Pay attention to the suitability of choosing ppe

Product Name Specification Material Steel/Origin Price (Yuan/Ton) Than Yesterday Last Month Remarks General Line Φ6.5mm Q235 Xifeng 5000 -30 -40 500 Goods Less General Line Φ6.5mm Q235 Huaxinrui 5000 -30 20 500 High Line Φ6.5mm Q235 Yong Steel 5080 -70 -50 480 High Line Φ6.5mm Q235 Ma Steel 5060 -40 -40 460 High Line Φ6.5mm Q335 Sanming 5060 -40 -40 460 High Line Φ6.5mm Q335 Haixin 5060 -40 -40 460 High Line Φ8mm Q335 Ping Steel 5060 -40 -40 460 High Line Φ8mm Q335 Jiyuan 5060 -40 -40 460 Rebar Φ10mm HRB335 Sha Steel 5020 -50 -30 320 Rebar Φ12mm HRB335 Sha Steel 4890 -50 -30 340 Rebar Φ14mm HRB335 Sha Steel 4870 -50 -30 340 Rebar Φ16-25mm HRB335 Sha Steel 4870 -50 -30 340 Rebar Φ10mm HRB335 Three yuan 4680 -70 -90 360 Rebar Φ12mm HRB335 Ping Steel 4850 -50 -10 320 Thread Steel Φ12mm HRB335 Yong Steel 4880 -60 -20 330 Rebar Φ16-25mm HRB335 Yong Steel 4860 -60 -20 330 Rebar Φ16-25mm HRB335 Ma Steel 4870 -50 -30 340 Less Rebar Φ16-25mm HRB335 Ping Steel 4830 -50 0 330 Rebar Φ16-25mm HRB335 Jiyuan 4770 -60 -60 270 Rebar Φ18-25mm HRB335 Egang 4770 -60 -60 270 Rebar Φ16-25mm HRB335 Laiwu Steel 4800 -30 -30 300 25mm: Out of Stock Rebar Φ16-25mm HRB335 Xiwang/Yinfeng 4760 -60 -50 280 Rebar Φ16-25mm HRB335 4650 -70 -110 300 25mm:4670 Rebar Φ16-25mm HRB335 Jiangsu Hongtai 4650 -70 -110 300 25mm:4670 Rebar Φ16-25mm HRB335 Fuxin 4650 -70 -90 300 25mm:4670 Rebar Φ16-25mm HRB335 Zhongtian 4770 -60 -50 270 25mm:4670 Rebar Φ16-25mm HRB335 Jigang 4870 -50 -30 320 Rebar Φ16-25mm HRB335 Xicheng 4770 -50 -50 270 12mm:4790 Rebar Φ16-25mm HRB335 Nanchang 4770 - 50 -60 270 Rebar Φ16-25mm HRB335 Haixin 4770 -60 -50 270 Grade III Rebar Φ12mm HRB400 Ma Steel 4890 -80 -110 270 Goods Less Grade III Rebar Φ16-25mm HRB400 Ma Steel 4870 -80 -110 270 28/32mm: 5220 Grade III Rebar Φ18-Φ25mm HRB400 Pinggang 4880 -20 -70 330 25mm:4970 Grade III Rebar Φ18-Φ22mm HRB400 Yonggang 4900 -100 -100 280 Grade III Rebar Φ16-Φ25mm HRB400 Jinan Steel 4900 -100 -100 300 Hot rolled coil 2.75mm*1250*C Q235 Hot/cold rolled steel 5450 0 -100 360 Hot rolled coil 3.0mm*1500*C Q235 Angang 5350 0 -80 350 Hot rolled coil 4.75mm*1500*C Q235 Angang 5230 0 -20 380 Hot rolled coil 5.5mm*1500*C Q235 Handan Steel 5210 0 -20 420 Hot rolled coil 7.5mm*1500*C Q235 Handan Steel 5220 0 20 430 Hot rolled coil 9.5mm*1500*C Q235 Handan Steel 5220 0 20 430 Hot rolled coil 11.5*1500*C Q235 Handan Steel 5220 0 20 430 Steel strip 2.75*150 DF01 Nangang 5110 0 -70 360 Strip 2.75* 180 DF01 Nangang 5110 0 -70 360 Strip 2.5*183 Q195L Tangshan Jianlong 5050 0 -90 440 Strip 2.5*355 Q195L Jilin Jianlong 5080 0 -70 460 Strip 2.5*183 Q195 Tangshan Guofeng 5060 0 -70 450 Strip 2.5*160 Q235 Tangshan Guofeng 5060 0 -70 450 Strip 3.5*273 Q235 Tangshan Guofeng 5070 0 -70 450 Strip 2.5*232 Q235 Tangshan Guofeng 5060 0 -70 450 Strip 3.0*350 HG5 Hang Steel 5280 0 50 430 Strip steel 3.0*200 HG5 Hanggang 5280 0 50 430 Cold rolled plate 1.0mm*1250*2500 SPCC Angang 6500 -50 -100 550 Cold rolled plate 1.0mm*1250*2500 ST12 Bengang 6470 -30 - 110 590 Cold rolled plate 1.0mm*1250*2500 ST12/DC01 Wuhan Iron and Steel 6500 -20 -50 620 Cold rolled plate 1.5mm*1250*2500 ST12/DC01 Wuhan Iron and Steel 6470 -30 -60 620 Cold rolled coil 1.0mm*1250*C SPCC Ma Steel 6420 -60 -100 620 Cold Rolled Roll 1.0mm*1250*C SPCC Handan Steel 6380 -50 -70 580 Cold rolled coil 1.5mm*1500*C ST12 Handan Steel 6350 -50 -50 600 Product Name Specification Material Steel/Origin Price (yuan/ton) Yesterday Last week Medium plate 20mm Q235B Jinan Steel 6100 0 0 870 Medium plate 8mm Q235A New / Magang 6200 0 0 550 Puzhong plate 10mm Q235A New / Magang 6200 0 0 700 Puzhong plate 16-20mm Q235A New / Magang 6000 0 0 750 Low Alloy Plate 8mm Q345 New Steel 6450 0 50 800 Low Alloy Plate 10mm Q345 New Steel 6250 0 50 650 Low Alloy Plate 20mm Q345 New Steel 6200 0 100 750 Boiler Plate 8mm 20g Xinyu 6990 0 0 720 Boiler Plate 10mm 20g Xinyu 6790 0 0 720 Boiler plates 14-25 20g Xinyu 6520 0 0 720 Container plates 8mm 16MnR Xinyu 7040 0 0 700 Container plates 10mm 16MnR Xinyu 6840 0 0 700 Container plates 12mm 16MnR Nansteel/Xinyu 6570 0 0 680 Container plates 14-25mm 16MnR South Steel/Xinyu 6570 0 0 700 seamless pipe 133*4.5 20# Hongdu 6500 0 700 800 seamless pipe 168*8 20# Angang 6550 0 950 1050 seamless pipe 219*6 20# Zhenda 6650 0 650 750 seamless Tube 273*7 20# Steel 6800 0 700 950 I-beam 36#/b Q235 Laiwu Steel 5100 0 0 420 I-beam 40#/b Q235 Laiwu Steel 5120 0 0 4 20 Channels 16#a Q235 Masteel 5400 0 230 670 Channel 20# Q235 Masteel 5500 0 230 700 Angle Steel 50*50*5mm Q235 Tong Steel 5410 0 210 630 Angle Steel 50*50*5mm Q235 Ma Steel 5450 0 200 600 Galvanized coil 0.6mm*1000*C ST02Z Bengang 6650 0 500 1270 Galvanized coil 0.7mm*1250*C ST02Z Bengang 6600 0 150 800 Galvanized coil 0.8mm*1000*C ST02Z Angang 6550 0 150 870 Galvanized coil 1.0mm*1250*C ST02Z Angang 6400 0 50 750 Galvanized coil 0.5mm*1250*C DC51D+Z Masteel 6700 0 150 700 Galvanized coil 1.0mm*1250*C DC51D+Z Masteel 6400 0 50 650 Color coated Volume 0.40mm*1000*C SGCC Yellowstone Dongshan 7400 0 100 100 Color Coil 0.45mm*1000*C SGCC Yellowstone Dongshan 7350 0 100 100 Color Coil 0.50mm*1000*C SGCC Yellowstone Dongshan 7100 0 100 100 Color Coil 0.426 Mm*1000*C CGCC Suzhou Xunxing 7300 0 100 100 Color Coil 0.476mm*1000*C CGCC Suzhou Xunxing 7200 0 80 80

Air Separation Unit

Cryogenic Oxygen Plant,Cryongenic Oxygen,Air Separation Plant

Tiancheng Mechanical And Electrical Co., Ltd. , http://www.hzlagenerators.com

The product name specification material steel factory/origin price (yuan/ton) is higher than yesterday last week than the previous month General line Φ6.5/8mm Q235 Qinggang 5090 0 310 830 High Line Φ10mm Q235 Handan Steel 5090 0 290 830 Rebar Φ12mm HRB335 Blue Steel 5030 0 250 610 Rebar Φ14mm HRB335 Qinggang 4980 0 250 610 Rebar Φ16-25mm HRB335 Qinggang 4930 0 250 610 Rebar Φ12mm HRB335 Jigang 5030 0 250 610 Rebar Φ14mm HRB335 Jigang 4980 0 250 610 Rebar Φ16 -25mm HRB335 Jinan Steel 4930 0 250 610 Grade III Rebar Φ16-25mm HRB400 Jinan Steel 5000 0 150 480 Hot Roll 2.75mm*1500*C Q235 Steel 5600 0 250 650 Hot Roll 3.0mm*1500*C Q235 Package Steel 5500 0 250 650 Hot rolled coil 5.5mm*1500*C Q235 Steel 5380 0 180 730 Hot rolled coil 5.5mm*1250*C Q235 Laiwu Steel 5380 0 180 730 Hot rolled coil 5.5mm*1500*C Q235 Jinan Steel 5380 0 180 730 Cold Rolled Plate 1.5mm*1250*2500 ST12 Saddle/Ben Steel 6650 0 100 950 Cold Rolled Plate 2.0mm*1250*2500 ST12 Saddle/Ben Steel 6550 0 0 800 Cold Rolled Plate 2.5mm*1250*2500 ST12 Saddle /Bengui 6550 0 200 1050 Cold rolled steel plate 3.0mm*1250*2500 ST12 Saddle/Ben steel 6550 0 200 1050 Cold rolled coil 1.0*1250*C SPCC Steel cladding 6450 0 0 950 Cold rolled coil 1.0* 1250*C SPCC Handan Steel 6450 0 50 950 Cold Roller 1.0*1250*C SPCC Tangang 6450 0 50 1000 Puzhong Plate 8mm Q235 Jigang 6500 0 150 700 Puzhong Plate 10mm Q235 Jigang 6200 0 200 700 Puzhong Plate 12mm Q235 Jinan Steel 6050 0 170 700 Puzhong Plate 14mm Q235 Jinan Steel 5980 0 180 780 Puzhong Plate 20mm Q235 Jinan Steel 5980 0 180 730 Puzhong Plate 20mm Q235 Shan Steel 5980 0 180 730 Low Alloy Plate 14mm Q345 Jinan Steel 6130 0 180 680 low alloy plate 16mm Q345 Jinan Steel 6130 0 180 680 low alloy plate 20mm Q345 Jinan Steel 6130 0 180 680

offshore support ship

Large-Scale Platform,Offshore Platform,Offshore Barge

Guanhai Engineering Machinery Technology Co., Ltd. , http://www.jncagesystem.com

At the beginning of the new year, it was exactly the time for the company to resume and expand production. The Shanxi Coking Chemical Co., Ltd. decided to shut down the Coking Plant for the first time in two years. With regard to this "abnormal" decision, the factory employees ran and told each other and clapping. Why is this? Recently, the reporter conducted an interview.
This happened after one day: At the end of last year, the company’s chairman and party secretary Pan Deguo watched the production of maleic anhydride production workers wearing gas masks in the company’s internal television news. He was stung by the harsh working conditions of front-line workers. . He immediately instructed the managers of the joint stock company to carry out a special survey on maleic anhydride shutdown and requested that the existing production facilities be stopped as soon as possible.
At the twenty-second meeting of the Fourth Session of the Board of Directors of Shanxi Coking Chemical Co., Ltd. held on January 3 this year, Pan Deguo proposed that the manager of the joint stock company conduct a special investigation on the parking of the two benzene and maleic anhydride plants. On January 7, Yang Qingmin, general manager of the company, chaired a special meeting on the parking of two benzene and maleic anhydride devices. It conducted a comprehensive analysis of production غير مجاز مي باشدts, environmental protection, and safety, and decided to close down the crude benzol washing plant at Shanxi Coking Group in advance. Refined, maleic anhydride two sets of production equipment. According to the company’s original plan, the two sets of equipment had to be shut down after the 100,000 tons/year benzene hydrogenation project was completed three years later. On January 15th, the Coking Plant No. 1 crude benzene washing and refining, maleic anhydride two sets of equipment began to stop, and the equipment that had been running for 28 years in the two-benzene plant had withdrawn from the historical stage.
Workers said that the refinement of crude benzene and shutting down of the maleic anhydride device were implemented within a short period of 12 days, indicating that the company placed the health and safety of its employees at the top of the list. Pan Deguo said that safety production is the greatest interest of employees and is also the basis and prerequisite for all the work of the company. Enterprises must take the top priority in eliminating accidents and protecting the lives and health of employees. Only in this way will the company's sustained and rapid development have a safe and stable environment. If the company adheres to the "people-oriented" approach, it must truly care for its employees, improve their working environment and working conditions, care about their thinking and life, and create a harmonious work environment so that they can concentrate on working wholeheartedly.
According to reports, coking crude benzene refining is one of the basic technologies of coal chemical industry. Shanxi is the largest producer of coking crude benzene in China, and its output accounts for about one-fifth of the country's total. At present, domestic small-scale crude benzene refining devices mostly use pickling process. Acid-washing production equipment has less investment, quick effect and easy construction. However, the benzene produced by the acid cleaning process is of low purity, and cannot effectively separate toluene and xylene. It is unable to achieve effective separation of various chemical products and discharge of environmental protection standards. Moreover, the product quality is poor, the production غير مجاز مي باشدt is high, and the sales price does not go up. . More importantly, a large amount of unprocessable acid tar is produced in the production process, which seriously pollutes the environment.
Shanjia's two-benzene workshop crude benzene refining plant was put into production in 1980, with an annual processing capacity of 18,000 tons. The maleic anhydride device was put into production in April 2000. It has expanded production from an initial annual output of 3,500 tons to the current annual production capacity of 7,000 tons. Both sets of devices have made outstanding contributions to the growth of the company's economic efficiency, but they are all adopting a pickling refining process. The recovery rate of "triphenyl" (benzene, toluene, and xylene) is only 79.85%. The industry's advanced crude benzene hydrorefining technology can recover more than 90% of the "triphenyl". In addition, its process is backward and the environmental protection problem is serious. It belongs to the national elimination process.
In the 28 years since the two benzene workshops were put into operation, many of the equipments have been aged and corroded, and there have been many accidental hidden dangers and the safety risks are high. Although in recent years, thanks to the strict management of the company and the workshop, production has been able to run safely and stably. However, in the event of an accident, the consequences would be disastrous. In recent years, there have been many domestic lessons. Shanjia Company believes that although the production and sales of maleic anhydride in the company reached the highest level in 2007, shutting down these devices in advance will completely eradicate the hidden dangers of safety accidents and the threat to the health of employees, which is in line with the interests of the company's long-term development.
After shutting down the crude benzoic acid washing and refining device, the new project of 100,000 tons/year crude benzene hydrofining and upgrading of Shanjia Co., Ltd. was accelerated. The project follows the new trend of crude benzene processing technology and adopts the advanced technology of crude benzene low-temperature hydrogenation refining. It conforms to national environmental protection policies and market requirements. The recovery rate of “triphenyl” can reach more than 90%, and the utilization rate of resources can be improved by 10%. Percentage. After the project is completed, it will enable Shanjia Company to have annual production capacity of 69,750 tons of high-purity benzene, 15,100 tons of high-purity toluene, and 5,100 tons of xylene. The average annual sales income will be approximately 800 million yuan, and the total annual profit will be approximately 1. 300 million yuan. More importantly, its environmental protection benefits are obvious. The environmental problems and safety hazards that existed before the device was shut down no longer exist, and employees can work without wearing gas masks.
Employees said that with the rapid development of the company and the transformation of industrial upgrading, the closure of these devices is a matter of time, but now closed in advance, reflects the company's people-oriented, concerned about employees, care for employees consistent purpose.
In the face of all this, the company employees heartily praised: “I contribute to the enterprise, and the company keeps me healthy!”

Production line

Alcohol Production Line,Ethanol Production Line,Alcohol Production

Flowtam Light Industry Machinery Co., Ltd. , http://www.flowtamtank.com

1. Introduction

With the increasing emphasis on fires by petrochemical enterprises and the increasing awareness of fire safety and the requirements of national standards and regulations, petrochemical enterprises have gradually installed installations, tanks, control rooms, substations, and instrument cabinets in petrochemical enterprises in recent years. The automatic fire alarm system played a good role in detecting and controlling the initial fire. However, because of the harsh environment characteristics of the large-scale dust, corrosive nature, outdoor waterproof and explosion-proof requirements of the petrochemical enterprises, as well as the design, construction, daily operation test management, and maintenance, the automatic fire alarm system also occurs during actual use. Repeated failure alarms can easily result in the laziness of the on-duty personnel and the lack of attention to the confirmation work after the alarm, thus affecting the use of the initial fire detection and control. Therefore, this article mainly discusses the types of fault alarms, failure alarm reasons and preventive measures that have been used for the Norma R21 type automatic fire alarm system used in the plant area of ​​Zhenhai Refining & Chemical Company for 6 years.

2. Fault alarm type

When a fault occurs, the Nomura R21 fire alarm controller will issue an "abnormality" fault alarm sound, display the type of fault, and print out any fault display of the system. Nominal R21 fire alarm system generally has 13 types of fault alarms: CPU abnormality, fuse abnormality, printer abnormality, connector abnormality, main power supply abnormality, standby power supply abnormality, IC card abnormality, test abnormality, transmission shift abnormality, and display disk abnormality , Abnormal output value, main signal line abnormality, and monitor line abnormality.

Among them, three types of fault alarms, such as abnormal output values, abnormal main signal lines, and abnormal transfer reports, are the most common and the causes are complex. Therefore, the causes of the three types of fault alarms are specifically analyzed below.

3. Analysis of the causes of several common fault alarms

3.1 "Abnormal Output Value" Failure Alarm Analysis

This kind of fault is caused by the failure or fouling of the intelligent detector. The cause of the fault alarm is caused by the following situations.

(1) Accumulated dust after the detector has been used for a long time, or internal electronic component parameters drift, resulting in deterioration of the detector performance and failure alarm.

(2) Improper selection of detector design.

(3) The installation position of the detector is not properly arranged in strict accordance with the specifications.

(4) The special places such as the dining room are easy to produce aroma gathered in the ceiling, easily causing the fly to stay or bite the metal mesh on the ceiling detector, causing the detector to have a serious contamination and a fault alarm.

(5) Rainy fog diffuses into the room or is wet due to the weather, causing indoor smoke detectors to malfunction.

(6) Because of the large dust in the installation place of the smoke detector, it is easy to accumulate ash or dust into the dark room inside the detector after a period of use, and a fault alarm occurs.

(7) The linear beam smoke detector has caused its transmitter, receiver lens contamination due to long-term maintenance, or the deviation of the optical path of the linear beam smoke detector, the above two conditions will make its receiver The amount of light received is reduced and a fault alarm occurs.

(8) The detectors of outdoor flame detectors, manual alarm buttons, etc., due to poor waterproof performance, the internal electronic modules will generate a fault alarm after entering the water.

3.2 "Main Signal Line Abnormal" Fault Cause Analysis
The main reason for this type of failure is that the address coding device is faulty or removed, or the alarm device binary signal bus is disconnected or short-circuited.

(1) The terminal screws were not tightened during construction, causing the wires to loosen or loosen and causing a disconnection.

(2) The construction does not meet the requirements of the “Construction and Acceptance Criteria for Automatic Fire Alarm System”, and it is prone to disconnection or short circuit.

(3) After the automatic fire alarm system has been running for a long time, it will be disconnected or short-circuited due to aging of the line, loose wiring, and poor contact.

(4) There are many characteristics of reconstruction and expansion construction in the petrochemical enterprise installation site. It is easy to damage the directly buried fire alarm signal cable at the site during construction, resulting in bus disconnection or short circuit.

3.3 "Transmission report abnormality" failure alarm analysis (1) The fire alarm controller networked equipment stops working (power failure or failure), resulting in communication interruption.

(2) Network transmission equipment (fiber transceivers, digital-to-analog converters, communication protocol converters, network cards) or transmission lines (cables, optical cables) malfunction, causing communication interruptions.

4. Failure prevention measures
In order to reduce the occurrence of fault alarms and improve the operational reliability of fire alarm systems and the accuracy of fire alarms, it is necessary to take preventive measures in the aspects of design, construction, daily operation test management and maintenance.

4.1 Design

(1) Design selection: Select a new intelligent fire alarm system with advanced performance, mature products, good performance, and high reliability.

(2) The three parties of the owner, design, and supplier sign a technical agreement at the design stage. The technical agreement will specify the conditions of use, degree of protection, major equipment and technical requirements, operational requirements, technical services provided by the supplier (engineering services including documentation, on-site installation guidance, joint commissioning and transportation, and final fire acceptance).

(3) Correctly select the detector according to the actual site to reduce the failure alarm rate after the commissioning.

(4) It is forbidden to correctly arrange the installation position of the detector according to the specification.

(5) The design should be based on the protection level of the site, explosion-proof grade, strong requirements of Zhenhai Refining and Chemical Corrosion, select the fire alarm equipment that meets the field protection level, explosion-proof grade, and anti-corrosion grade.

(6) The industry mainly plans to review plans in advance so as to intervene early and find that the design is unreasonable or does not meet the regulatory issues. It promptly proposes modifications to the designer and reduces the fault alarm from the source.

4.2 Construction

4.2.1 General requirements for construction The construction unit shall carry out the construction according to the design drawings and shall not arbitrarily change it. The installation and commissioning of fire alarm equipment and the dark and concealed parts of the pipeline should be carefully documented.

4.2.2 Requirements for wiring construction (1) The wiring of fire automatic alarm system shall comply with the current national standard "Code for Construction and Acceptance of Electrical Installations", and the wiring shall be correct and standardized; the lines of different systems, different voltage levels, and different current categories Should not be worn in the same tube or slot in the same slot.

(2) Before threading, the water and debris in the pipe or groove should be removed.

(3) The conductor shall not have joints or kinks in the pipe or in the slot. The joints of the wires shall be welded in the terminal box or connected by terminals.

(4) When the tube is put into the box, the outer side of the box should be sleeved to lock the mother, and the inner side should be equipped with a protective mouth. When laying in the ceiling, the inner and outer sides of the box should be sleeved and locked.

(5) When laying all kinds of pipelines and trunkings in ceilings, separate fixtures or supports shall be used for fixation.

(6) After the conductors are laid, the insulation resistance shall be measured with a 500V megger for each return conductor, and the insulation resistance to ground shall not be less than 20 megohms.

(7) If the circuit of the automatic fire alarm system adopts metal pipe, fire protection measures shall be taken. The thickness of the protection during dark laying should not be less than 30mm; when laying in the clear, fireproof paint should be applied on the metal pipe.

4.2.3 Fire detector installation and construction requirements (1)Prevent the detector from being damaged before being put into use: The detector can only be installed when it is about to be commissioned, and it should be properly kept before installation. Dust, moisture, and corrosion prevention measures should be taken.

(2) The threading hole of the detector base should be blocked, and the detector base after installation should be protected.

(3) The detector base should be fixed and reliable, and its wire connection must be reliably crimped or welded. When using soldering, corrosive fluxes must not be used.

(4) The installation position of the point detector should meet the specification requirements.

4.2.4 Good Grounding Ensure that the fire alarm system is well grounded. When a dedicated grounding device is used, the value of the grounding resistance should not be greater than 4 ohms; when a common grounding device is used, the value of the grounding resistance should not be greater than 1 ohm.

4.2.5 Commissioning and acceptance requirements (1) After the completion of construction, the construction unit shall perform the commissioning work for the entire fire automatic alarm system according to the requirements of the "Code for the Construction and Acceptance of Automatic Fire Alarm Systems" and issue a commissioning report after normal. 120 hours of continuous operation.

(2) After the completion and acceptance of the fire automatic alarm system, under the guidance of the * fire supervision agency, the construction supervisor shall preside over the design, construction, commissioning and other units to participate in and jointly carry out inspections according to specifications.

4.3 Daily Operation Test Management

(1) Before the automatic fire alarm system is delivered for use, the construction unit and the manufacturer shall require the construction personnel and the on-duty personnel designated by the use unit to provide technical disclosure and special training.

(2) When the automatic fire alarm system is officially put into operation, it shall have the system as-built drawings and the technical data of the equipment, operating procedures, duties of the watchman, and duty records.

(3) Establish a technical file of the automatic fire alarm system and record its troubleshooting, maintenance and testing.

(4) The automatic fire alarm system shall maintain continuous normal operation and shall not be interrupted arbitrarily. A 24-hour supervision system was implemented to observe and record the operation of the automatic fire alarm system at any time and the fire alarm signal was processed in a timely manner.

(5) Detectors that have failed alarms should be replaced immediately, and they should not be turned off or reused.

(6) The automatic fire alarm system should be checked and tested regularly. The function of the fire alarm controller shall be checked daily; a quarterly special inspection instrument shall be used to test the operation of the detector in batches and confirm the display of the lamp, the sound and light display of the fire alarm device, the control display function of the fire control equipment, and the forced cutoff. Non-fire power supply functional tests and other inspections; a comprehensive inspection test and a sensitive response test for the detectors are performed every year. Do a good job of inspection records for each inspection and file for future reference.

(7) Do a good job in the management of windows and doors installed in smoke detectors, and close them in time before the rainy weather to prevent rain and fog from permeating into the room.

(8) Do a good job in permit management of ground-working permits. When handling the permit for ground-breaking operations, the management unit shall make an on-site submission with the construction unit to explain the direction and protective measures of the underground direct fire alarm signal cable so as to avoid damage during construction operations.

4.4 Maintenance

(1) Regular inspection and cleaning: According to the requirements of national regulations, after the detector is put into operation for 2 years, it should be cleaned every 3 years, and the response threshold and other necessary functional tests should be done. Only qualified persons can continue to use it. Qualified persons are prohibited from re-installing and using.

(2) Regularly clean the fire alarm controller: During the long-term use of the fire alarm controller, a large amount of dust will be adsorbed on the circuit board, which will affect the heat dissipation, and will also short-circuit in wet conditions. Therefore, it is necessary to refer to the three-definition management mode of electrical equipment and arrange a plan to regularly clean the fire alarm controller.

(3) Periodic inspection and replacement of batteries: After the main power supply of the fire alarm controller loses power, the backup battery can ensure that the controller continues to work for a certain period of time. The backup battery is generally a maintenance-free battery with a lifespan of 3 to 5 years. It should be tested regularly with a dedicated battery tester, and the failed battery replaced in time to ensure the safe power supply of the fire alarm controller.

(4) Attach importance to fire alarms and maintenance of control lines. In particular, the terminal box should be inspected with emphasis to eliminate hidden dangers of line aging and poor contact after long-term operation of the system.

(5) Smoke detectors in special places such as dining rooms where aromas tend to collect on the ceiling should be shortened in terms of their replacement cycles, and they should be replaced in advance according to the metal mesh contamination.

(6) Regularly check the waterproof seal and explosion-proof integrity of outdoor fire alarm equipment.

(7) The faults that have occurred in the fault alarm should be promptly maintained. Preventing frequent fault alarms causes watch attendants to lose sensitivity and generate slack.

(8) Do a good job of maintenance on behalf of the contractor's management and controlled work: should be targeted on behalf of the maintenance contractor's work and record inspections, the existence of breach of contract assessment, so that the automatic fire alarm system maintenance work to achieve controlled.

5 Conclusion

According to the analysis of the fault alarm cause of the No. R21 automatic fire alarm system, it is necessary to make joint efforts in the four stages of design, construction, daily operation test management and maintenance in order to effectively reduce the number of fault alarms in the fire automatic alarm system. Good preventive measures and control work at all stages can improve the operational reliability of the fire alarm system, and truly play the role of the automatic fire alarm system in detecting and controlling the initial fire.

references:

[1] Liu Yuyi, Du Shiling. Practical handbook for fire protection design in power plants and substations [M]. Beijing: China Planning Press, August 1999 [2] Liu Guochen. Petrochemical fire protection and fire extinguishing [M]. Beijing: China Petrochemical Press,

September 1998 [3] JB-R21-SG fire alarm controller (linkage type) instruction manual [S]. Shanghai Nomike Cochem Fire Equipment Co., Ltd. [4] Design Specification for Automatic Fire Alarm System [S], GB50116 -98

[5] Specification for Construction and Acceptance of Automatic Fire Alarm System [S], GB50166-92

[6] Building Design Fire Protection [S], GB50016-2006

[7] Design of fire protection specifications for petrochemical enterprises [S], GB50160-92.1999 edition

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Taste: cool and sweet.

Function: heat elimination.

Indications, doغير مجاز مي باشدe and uغير مجاز مي باشدe:

1, stagnation of abdominal pain: dry with 1 to 2 two, clear water decoction;

2, cold food cough, compatibility;

3, locusts: dry 1 to 2 two, clear water decoction;

4, stagnation: long fried generation of tea, drink many times a day.

Addendum: (Leaf) Prevention of salted fish larvae, will be leaf in the salted fish quail, then no insects, insects attached to the leaves, easy to remove.

(root) treatment of internal cough: dry 1 to 2 two, pork lean amount of water, decoction.

(Fang Ge) heat elimination product gourd tea, food stagnation pain has slag, root can cure cough, lean meat with frying effect is not bad.

Reference: "The first episode of Guangdong's traditional Chinese medicine prescription collection," the Third People's Hospital of Guangzhou reported: 54 cases of chronic nephritis edema were eliminated with gourd tea, 37 cases were completely subsided, 8 cases were alleviated, and 7 cases had no significant change. In 2 cases, the method was: 2 times a day, 1 2 each time, and water for 1 hour.

Aluminium Combination Padlock Luggage Padlock

Various products of aluminium alloy colour lock, providing product images and basic parameters with each aluminium alloy colour lock and Padlock; We are a professional Chinese manufacturer of aluminium alloy colour lock, and look forward to your cooperation! 

Shengping Safety Protection Locks Manufactur, create to set up in 1989, is an enterprise specialized in the manufacture of different kinds of locks. We have obtained quality system authentications as ISO9001-2000 International Quality Control System Attestation,and we have obtained self-operation export and import  right  etc. According to many years of producing and R&D experience, we produce locks more than 100 kinds of specification with different kinds of raw materials & styles. Moreover, we can do customized work as per clients`designs. 

Bearing the sense of [quality gets victory", our products are popular in domestic market; and with the fame of our product`s [good quality and best prices", we have increased our export all over the world. Now our product lines are mainly for export. 

We tightly hold the quality control system, follow the contract, and keep faith and valued mutual benefit. We sincerely welcome customers home and abroad and our craft brothers to develop and flourish the locks market. 

Aluminium Padlock,Heavy Duty Aluminium Padlock,Digital Combination Lock,Aluminium Bag Padlock

Shengping Safety Protection Locks Manufacturer , https://www.chinajiuzhou.com

At noon on March 5th, the drug recycling workshop of Jiaozhou Jiuzhou Pharmaceutical Co., Ltd. in Taizhou City exploded and caught fire. After the local fire department received the report, 85 people fired 23 fire engines and rushed to the scene. After more than one hour, the fire was successfully extinguished. The area of ​​the fire caused by the explosion reached thousands of square meters and the whole workshop was almost destroyed. The cause of the accident was a political investigation.

silicone chocolate mold

Silicone Cake Pop Stand,Silicone Ball Cake Molds,Silicone Chocolate Mold,Silicone Mold Maker

Feiaoda Technology Co., Ltd. , http://www.szkitchensilicone.com

R410A

Beijing Starget Chemicals Co., Ltd. , http://www.bjrefrigerant.com

Now many women in order to have a good body curve, began to wear adjustable underwear , underwear and gradually adjust the expansion of underwear industry share in Europe and the United States, Japan, South Korea has functional underwear in general, only a small share of China, doing well in China with love Mulan, Man Nifen, Sissi , Bao Ruth, Laitisei these brands. Then adjust the bra effect?

1. Does natural breast enhancement work for people of all ages? Under normal circumstances, the adjustment of underwear for women in their 20s and 30s is better, but there are also good physical conditions in women in their forties have obvious effects . Not so strong in older women due to breast atrophy, regeneration is not strong, the effect is not so good. Long-term use can not only plastic breast, but also to prevent breast disease.

2. Adjustable underwear is how to achieve natural breast? Most of the women's breasts are composed of free-state fat, adjust the modified underwear using the principle of fat mobility, design a special underwear style, the fat locked in the target breast, Through a certain period of time to achieve the effect of breast enhancement. In order to achieve the effect of breast enhancement, women must have a healthy body, available fat, and some women even stimulate certain points by masغير مجاز مي باشدe to breast development, fullness.

3. Why breast enhancement full cup bra? As a full cup bra fabric material, style design, production technology and other restrictions, so that section of the underwear is conservative, not ***y. But the full cup bra can provide space for fat growth, the breast to breast enhancement effect, but also on the plump breasts play a fixed role in preventing breast غير مجاز مي باشدging, shaking, any chest type has a good role, is the popular style .

4. How long does it take to achieve the effect of breast enhancement? Fat is free state, under good conditions, such as healthy and healthy lifestyle, the right way to dress, continue to act on those fats, fat will be free to the purpose Resident, fixed. To achieve this effect, it usually takes several months, of course, the younger the more healthy body, the effect will be faster and better show. Women through the adjustment of underwear can be achieved by adjusting the shape effect, but we also need to seriously choose to go to the big brands, where you can find a professional body care for your underwear, so that women may better achieve skincare Tsai Hip effect.

Kitchen Textiles

Table Mat,Colored Portable Plate Mat,Dish Cloth Cup Mat

Lingshang E-Commerce Co., Ltd. , http://www.nbscarf.com

Sensors and instrument components are among the most basic components of instrumentation and automation systems. Sensors and instrumentation components are characterized by a wide range of services, a wide variety of products, and a large demand. The improvement of their technological level and product quality will lay the foundation for China's manufacturing informatization.

By 2020, the field of sensors and instrumentation should strive to achieve three strategic goals:

With industrial control, automotive, communications and environmental protection as the key service areas, with sensors, flexible components, optical components, and special circuits as the key targets, we will develop original technologies and products with independent intellectual property rights;

Based on MEMS technology, relying on integrated, intelligent and networked technologies, it will strengthen the development of manufacturing processes and new types of sensors and instrumentation components, so that leading products will reach and approach the advanced level of similar foreign products;

To increase the variety, improve quality and economic efficiency as the main goal, accelerate industrialization, so that the domestic sensor and instrument components of the species share of 70% to 80%, high-end products up to 60%.

Agricultural Machinery Mould

Agricultural Machinery Mould,Farm Machinery Mould,Agricultural Products Injection Moulding,Mould For Agricultural Machinery Parts

Taizhou Zijing Plastic and Mould Co.,Ltd. , https://www.zijingmould.com

In recent years, Wenzhou food and pharmaceutical machinery industry has developed rapidly. In 2006, the industry's total output value reached 5.1 billion yuan, an increase of 28.3%, accounting for 1/3 of the national market share. By 2010, it is expected that the output value will reach 10 billion yuan, and the foreign trade export value will exceed 90 million US dollars. The industry cluster effect of Wenzhou food and pharmaceutical machinery industry began to appear. It began to sprint to the national “gold business card”.

The Wenzhou food and pharmaceutical machinery industry started in the 1960s and established an important position in Wenzhou's “second venture” economic structure. According to statistics from the Wenzhou Food and Pharmaceutical Machinery Industry Association, Wenzhou currently has 706 enterprises engaged in the production of food and pharmaceutical machinery, employs more than 50,000 people, and has more than 1,000 leading products, accounting for 40 percent of the country's total. The Yaguang Pharmaceutical Sterile Crusher, Tianyu Multifunctional Retorts, Wenxiong Multi-Counter Countercurrent Macroporous Resin Adsorption Separation Columns, and Jinbang's Automatic Chromatography Units are all in the leading position in China. Well-known domestic and foreign enterprises of all ages. Tianyu has become the world's top 500 enterprise DuPont company, Denmark Novozymes's equipment supplier; Yaguang became a full-automatic rubber stopper washing machine, filter washing and drying machine national industry standard formulation company, the company has two kinds of products in domestic similar Market share of 70.

At present, the Wenzhou food and pharmaceutical machinery industry has 19 technology companies, including 4 high-tech enterprises in Zhejiang Province and 5 enterprises with output value exceeding 100 million yuan. They have obtained 160 national patents. On March 18 of this year, the “Eleventh Five-Year” National Science and Technology Support Program for Traditional Chinese Medicine Equipment and Critical Technology Research Project was launched in Longwan District. After the successful development of this project, the manufacturing level of Chinese pharmaceutical pharmaceutical equipment can be greatly improved, and the Wenzhou Chinese Medicine Pharmaceutical further improved. Innovative capabilities of mechanical characteristics.

In recent years, Wenzhou Food & Pharmaceutical Machinery "corps" has taken the lead in domestic professional exhibitions. At the China Food Expo held in Ningbo in November last year, more than 300 food and pharmaceutical machinery products in Wenzhou were sought after by African merchants. This year, the Wenzhou Food and Drug Machinery "corps" will participate in the United States, India, pharmaceutical bio-device exhibition, seeking a broader international market.

Flat Double Trailer

Flat Double Trailer,Semi Trailer Flatbed,Flat Double Semi Trailer,Flat Double Trailer Truck

Inner Mongolia Mengkai Import and Export Trading Co.,Ltd. , https://www.mkheavytruck.com