Instructions for labor protection when handling oxygen and acetylene cylinders

Free technical library

OCCUPATIONAL SAFETY AND HEALTH
Free library / Occupational Safety and Health / Standard instructions for labor protection

Instructions for labor protection when handling oxygen and acetylene cylinders

Occupational Safety and Health

Occupational Safety and Health / Standard instructions for labor protection

Comments on the article

Safe Operation

1. General requirements for labor protection

1.1. This labor safety instruction is intended for workers engaged in servicing oxygen and acetylene cylinders (hereinafter referred to as cylinder servicing workers).

Persons at least 18 years of age who have passed a medical examination, special technical training in this specialty, passed an exam and completed an on-the-job internship are allowed to independently work on servicing cylinders. A certified cylinder maintenance worker is issued a certificate signed by the chairman of the commission and the safety inspector for the right to carry out work.

1.2. Admission to work for a cylinder maintenance worker is issued by order of the enterprise after an introductory briefing, the issuance of a certificate of knowledge testing on labor protection and on-the-job training.

1.3. All work after initial instruction at the workplace and testing of knowledge during the first 2 to 5 shifts (depending on the length of service, experience and nature of the work) is carried out under the supervision of a foreman or experienced worker, after which the employee’s permission to work independently is issued.

An employee who has received instruction and has demonstrated unsatisfactory knowledge is not allowed to work and must undergo repeated instruction.

1.4. Repeated testing of the employee’s knowledge of cylinder maintenance must be carried out by the enterprise commission: periodically - at least once every 12 months; when moving from one enterprise to another; at the request of the person responsible for supervision. The results of testing the knowledge of workers in servicing cylinders must be documented in a protocol, the number of which is affixed to the certificate and approved by the seal of the enterprise.

1.5. The cylinder maintenance worker is obliged to comply with the work and rest schedule established by the organization’s administration.

Smoking in warehouse, production and auxiliary premises and on the territory is permitted only in specially designated areas marked “Smoking Area”, provided with fire extinguishing equipment and equipped with bins or boxes with sand, fire extinguishers with carbon dioxide, and compressed nitrogen cylinders.

1.6. Oxygen production is an explosive and hazardous industry, including cylinder maintenance work.

Pure oxygen and its mixture with air are not toxic; the degree of toxicity depends on the oxygen concentration and the individual sensitivity of the person.

1.6.1. Oxygen gas is an active oxidizing agent. Most substances and materials in contact with oxygen become explosive and fire hazardous.

This danger increases with increasing temperature, pressure, flow rate and volume fraction of oxygen in the air.

1.6.2. Mixtures of gaseous oxygen with combustible gases are explosive.

1.6.3. Lubricants and grease contamination of surfaces in contact with oxygen cause fire or, at a certain layer thickness, cause a detonation explosion.

1.6.4. The combustion rates of materials in oxygen are tens of times higher than in air. A particular danger is posed by the fire of clothing of personnel located in an atmosphere with a high oxygen content. The rate of burning of most fabrics is such that the victim does not have time to tear off his burning clothes.

1.6.5. Structural and sealing non-metallic materials (fiber, nylon, polycarbonate, rubber based on natural rubber, etc.) can easily ignite in high-pressure oxygen when an ignition source appears (spark, friction, shock wave, etc.). Ignition of non-metallic material may ignite the metal in contact with it.

1.6.6. Metals that burn intensely in an oxygen environment include titanium, aluminum and its alloys, carbon and stainless steels. Copper and alloys based on it do not burn in oxygen, but when exposed to high energy sources (for example, when burning a non-metallic material), copper and brass parts may melt.

1.6.7. Oxygen is heavier than air. When gaseous oxygen leaks due to leaks in the connections of the valve or reducer, it can accumulate in low places.

1.6.8. Workers servicing oxygen cylinders may be exposed to the following hazardous and harmful production factors:

increasing the oxygen content in the working area at atmospheric pressure, which should not be more than 23% of the volume;
unguarded moving or rotating equipment.

1.6.9. The shell of oxygen cylinders is made of carbon steel in accordance with GOST 949-73 "Steel cylinders of small and medium volume for gases at Рр 19,6 MPa, technical conditions." It is made of seamless pipes and is designed to operate at temperatures from -50 to +60°C. For oxygen, cylinders with a volume of 5 l and 40 l are used.

1.6.10. Oxygen cylinders are produced for a pressure of 14,7 MPa (150 kgf/cm2), the neck thread of oxygen cylinders is 27,8 mm. The number of threads with a full profile must be at least 8.

1.6.11. The oxygen cylinder must be equipped with a valve of type VK-86 or VK-94 according to the specifications “Valve of an oxygen cylinder of medium capacity for P 20 MPa (200 kgf/cm2).

1.6.12. Oxygen cylinders must be painted blue with the inscription “oxygen” in black. The height of the inscription signs is at least 6 cm.

1.6.13. The following information must be stamped on the top spherical part of each cylinder:

manufacturer's trademark;
balloon number;
actual mass of an empty cylinder (kg);
date (month, year) of manufacture and year of the next survey;
operating pressure Р, MPa (kgf/cm2);
test hydraulic pressure P, MPa (kgf/cm2);
cylinder capacity (l);
stamp of the quality control department of the manufacturer of a round shape with a diameter of 10 mm.

The weight of the cylinders is indicated taking into account the weight of the applied paint, the ring for the cap and the shoe, but without the weight of the valve.

1.6.14. Valves in oxygen cylinders must be screwed in using sealing materials that cannot ignite in an oxygen environment.

1.7. Acetylene production is an explosive and hazardous industry, including work on servicing acetylene cylinders.

Chemically pure acetylene is a colorless gas with a faint ethereal odor. Technical acetylene has a sharp, specific odor due to the presence of impurities in it, in particular hydrogen phosphide.

1.7.1. Acetylene is a weak drug. Inhaling air containing up to 5% acetylene does not cause any pain. At high concentrations, acetylene acts as an asphyxiant gas.

1.7.2. Acetylene explodes in a mixture with air and oxygen when the acetylene content is in the range of 2,2 - 100% vol.

1.7.3. Workers servicing acetylene cylinders may be exposed to the following hazardous and harmful production factors:

gaseous toxic impurities in acetylene: hydrogen sulfide and hydrogen phosphorous;
increased gas contamination and dustiness of the air in the working area;
unguarded moving or rotating equipment.

1.7.4. The shell of acetylene cylinders is made of carbon steel in accordance with GOST 949-73 "Steel cylinders of small and medium volume for gases at Рр 19,6 MPa, technical conditions." Manufactured from seamless pipes in volumes of 1,3 l, 5 l, 10 l and 40 l and designed to operate at temperatures from -50 to +60°C.

1.7.5. An acetylene cylinder is a metal shell filled with porous filler and acetylene solvent.

1.7.6. Technical characteristics of acetylene cylinders (shells) are presented in table. 1

Table 1

(click to enlarge)

The weight of the cylinders is indicated without valves, caps, rings and shoes and is a reference value.

1.7.7. Acetylene cylinders are produced for a pressure of 10,0 MPa (100 kgf/cm2), the neck thread of acetylene cylinders is 30,3 mm. The number of threads with a full profile must be at least 8.

1.7.8. Depending on the porous filler, acetylene cylinders are produced with bulk porous mass (BAU-A coal) and with cast porous mass (LPM).

Cylinders with coal BAU-A are produced by JSC "Lentekhgaz" (St. Petersburg).

Cylinders with cast porous mass are produced by JSC Ural-Techgaz Plant (Ekaterinburg).

1.7.9. Technical acetone is used as an acetylene solvent in accordance with GOST 2768-84.

1.7.10. Acetylene cylinders must be equipped with valves such as VBA and BA.

1.7.11. Acetylene cylinders must be painted white with the inscription "Acetylene". The inscription is red, the height of the signs is at least 6 cm.

On cylinders with LPM, in contrast to cylinders with bulk porous mass made of activated carbon of the BAU-A brand, below the inscription “Acetylene” the letters “LM” 6 cm high are painted in red paint. On the upper spherical part of cylinders with LPM manufactured before 1988. , the stamp of the porous mass filler plant “B21” is stamped, and on the cylinders manufactured starting in 1988, the stamp “LM” is stamped.

1.7.12. The following information must be clearly stamped on the top spherical part of each cylinder:

manufacturer's trademark;
balloon number;
the actual weight of the empty cylinder (kg) with an accuracy of 0,2 kg;
date (month and year) of manufacture and year of the next survey;
operating pressure Р, kgf/cm2;
test hydraulic pressure П, kgf/cm2;
cylinder capacity (l): for cylinders with a capacity of over 12 l, actual with an accuracy of 0,3 l; for cylinders with a capacity of up to 12 liters inclusive - nominal;
stamp of the quality control department of the manufacturer of a round shape with a diameter of 10 mm;
date of filling with porous mass;
tare weight T - the weight of the cylinder without a cap, but with a porous mass, a shoe, a ring, valves and solvent, kg.

1.8. In accordance with the Standard Industry Standards, workers, depending on their working conditions, must be provided with free work clothing, safety footwear and other personal protective equipment (PPE):

tarpaulin mittens;
rubber aprons;
respirators;
glasses.

1.9. In addition to these instructions, workers should know:

instructions for emergency situations at the workplace;
accident elimination plan;
instructions at your workplace;
fire safety instructions in the workplace;
rules for the use of PPE (respirators, goggles, helmets, etc.);
rules for using primary fire protection equipment (fire extinguishers, fire hoses);
rules of personal hygiene;
rules for first aid in case of accidents;
rules for the design and safe operation of pressure vessels;
standard instructions on labor protection when filling oxygen cylinders and handling them by consumers;
rules for the transportation by road of inert gases and compressed and liquefied oxygen;
safety and health regulations for acetylene production and flame processing of metals;
interindustry rules on labor protection in the production of acetylene, oxygen, the spraying process and gas-flame processing of metals.

1.10. Employees must immediately report cases of injury and equipment malfunction (gas leaks, etc.) to the shift supervisor or station manager.

1.11. Employees are responsible for violation of the requirements of this instruction in accordance with applicable law.

2. Labor protection requirements before starting work

Before starting work, the employee should:

put on the overalls, special footwear and mittens laid down according to the norms;
read the entries in the logbook and accept the equipment, making sure that all mechanisms and parts are in good working order;
prepare a soap solution to check for gas leaks;
inspect the primary fire extinguishing equipment and make sure that they are in good condition;
check the correctness of the lighting;
check the scales used for weighing cylinders using a standard weight, record the test results in a journal;
prepare a working tool and writing materials.
inspect and, if necessary, prepare the cages for the installation of cylinders.

3. Labor protection requirements during work

3.1. Work only in overalls and PPE.

3.2. Follow job instructions for receiving, storing and issuing cylinders.

3.3. Make sure that posters are posted in the cages indicating the condition of the cylinders (empty, full, for repair, etc.).

3.4. When accepting empty cylinders from the consumer, the employee must:

carry out an external inspection for the absence of dents, nicks, vents and other visible damage, as well as dirt and traces of oil or other organic contaminants on the surface of the cylinders and valves;
make sure that oxygen cylinders have a distinctive blue color and the inscription “OXYGEN” in black paint, acetylene cylinders have a white color and the inscription “ACETYLENE” in red, cylinders with LPM have the red letters “LM”;
make sure that the cylinders do not have a loose threaded ring on the neck, as well as an oblique or weak shoe nozzle and are equipped with: oxygen cylinders with valves of type VK-86 or VK-94, acetylene cylinders with valves of type VBA-1 or VA-1;
establish that the valve spindles turn easily and the valves do not have external damage;
check the presence of residual pressure in the cylinders, which should not be lower than 0,05 MPa (0,5 kgf/cm2), and the scheduled date for the next inspection of the cylinders.

3.5. Based on the results of the inspection of the cylinder and its passport data, reject the cylinders.

3.6. Place faulty cylinders in cages separately from filled, empty, and suitable for filling.

3.7. A batch of oxygen cylinders (or one cylinder) when supplied to the consumer must be accompanied by a quality document containing the following data:

name of the manufacturer and its trademark;
name, brand and grade of the product;
batch number;
date of manufacture of the product;
amount of gas in kg or m3;
results of tests or confirmation of oxygen compliance with standard requirements.

3.8. Carry out quantitative and qualitative acceptance of cylinders from vehicles and wagons, recording the results of acceptance and shipment in a journal and register.

3.9. Workers must have a certificate for the right to operate a crane beam; they can be involved in operating the crane beam by order of the foreman after an extraordinary briefing with a record of this in the briefing log.

3.10. Do not arrange cylinders during the inspection without a fence.

3.11. Cylinders should be stored in specially equipped warehouses. Joint storage of oxygen and acetylene cylinders is not permitted.

3.12. Cylinders should be stored in an upright position in specially equipped cages. The cages are equipped with barriers that protect the cylinders from falling. The passages between the rows of cages must have a width of at least 1,4 m for the free passage of trolleys with cylinders.

3.13. To protect filled cylinders from direct sunlight, glass windows in the warehouse should be frosted or painted over with white paint.

3.14. Cylinder storage should be divided into compartments. Each compartment must have its own exit to the outside.

3.15. Only filled or only empty cylinders can be placed in one compartment.

3.16. To ensure fire safety, each compartment must have a fire hydrant; the premises must also be equipped with fire extinguishers.

3.17. Reception and release of cylinders is made only in the presence of caps.

3.18. During work it is forbidden:

use a sparking tool;
smoking indoors (warehouses);
block up aisles;
allow unauthorized persons to enter the workplace;
hit the balloons against each other;
obstruct access to primary fire extinguishing equipment;
store cylinders in warehouses outside the cages and leave the cages open without safety chains;
place empty, full and rejected cylinders in one compartment.

3.19. Before shipping filled cylinders to the consumer, the receiver must check the cylinders by opening the valves of two to three cylinders in each container; Only after making sure that the cylinders are full should they be shipped to the consumer.

3.20. The condition of the containers should be checked (presence of chains, hooks, eyes, their general condition).

3.21. It is necessary to monitor the cleanliness and order in and around the warehouse, as well as distribute transport to loading and unloading points, and correctly draw up invoices.

3.22. Particular attention should be paid to ensure that oxygen cylinders are not contaminated with oil; At the slightest suspicion, cylinders should be rejected.

3.23. Do not release cylinders if the consumer has violated the rules for handling cylinders (dirty car, lack of gaskets, corners, caps, etc.).

3.24. When accepting a shift, the employee is required to check the number of cylinders in the warehouse. During the shift, keep records of shipped, returned and rejected cylinders.

4. Labor protection requirements in emergency situations

4.1. In the event of danger or situations that could lead to accidents or incidents, an emergency signal should be given in the warehouse premises.

4.2. If an oxygen leak (by sound) is detected from the cylinder, it is necessary, if possible, to close the cylinder valve with a special key. If a constant gas leak is detected from a cylinder or cylinders, they should be quickly removed from the premises to a well-ventilated area.

4.3. If an external or internal source of heating (ignition) appears, which could lead to a cylinder explosion, the cylinders should be evacuated immediately. If it is impossible to remove from the danger zone, it is necessary to cool the cylinders with water until they cool completely.

4.4. When the oxygen coming out of the cylinder catches fire, open the cylinder valve as quickly as possible; Water the cylinder with water until it cools completely, then remove it from the cylinder area. If the acetylene escaping from the cylinder catches fire, close the cylinder valve as quickly as possible; Water the cylinder with water until it cools completely, then remove it from the cylinder area.

4.5. If clothing soaked in oxygen catches fire, immediately immerse yourself in a bath of water or pour water over the victim. If there is no water, you need to throw off or tear off your clothes; It is not allowed to put out the flame or wrap up the victim, because Clothing soaked in oxygen can burn without access to air.

4.6. In the event of an accident, the victim or eyewitness is obliged to notify the shift supervisor or foreman, who must organize first aid for the victim: ensure a flow of fresh air, rest, warmth, and clean clothes. If gas gets into your eyes or skin, rinse with warm water; if you get a burn, apply an aseptic bandage. If necessary, call an ambulance.

5. Labor protection requirements at the end of work

At the end of a shift, an employee should:

5.1. Clean up the work area and remove tools.

5.2. After working with carbon tetrachloride to remove oil stains from an oxygen cylinder, the remainder of the substance should be returned to storage.

5.3. Close cages with cylinders with chains.

5.4. Make an entry in the logbook about the condition of the equipment and the presence of cylinders.

5.5. Take off and put in order the overalls and personal protective equipment, put them in a special closet. Wash your face and hands with soap and take a shower.

5.6. Report to the supervisor of the end of the shift.

5.7. Turn off the lights, close the doors.

5.8. Leave your workplace only with the permission of the work manager.

We recommend interesting articles Section Standard instructions for labor protection:

▪ Laser Therapy Specialist. Standard instruction on labor protection

▪ Work on gear cutting machines. Standard instruction on labor protection

▪ Loading and unloading of hopper cars. Standard instruction on labor protection

See other articles Section Standard instructions for labor protection.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Artificial leather for touch emulation 15.04.2024

In a modern technology world where distance is becoming increasingly commonplace, maintaining connection and a sense of closeness is important. Recent developments in artificial skin by German scientists from Saarland University represent a new era in virtual interactions. German researchers from Saarland University have developed ultra-thin films that can transmit the sensation of touch over a distance. This cutting-edge technology provides new opportunities for virtual communication, especially for those who find themselves far from their loved ones. The ultra-thin films developed by the researchers, just 50 micrometers thick, can be integrated into textiles and worn like a second skin. These films act as sensors that recognize tactile signals from mom or dad, and as actuators that transmit these movements to the baby. Parents' touch to the fabric activates sensors that react to pressure and deform the ultra-thin film. This ... >>

Petgugu Global cat litter 15.04.2024

Taking care of pets can often be a challenge, especially when it comes to keeping your home clean. A new interesting solution from the Petgugu Global startup has been presented, which will make life easier for cat owners and help them keep their home perfectly clean and tidy. Startup Petgugu Global has unveiled a unique cat toilet that can automatically flush feces, keeping your home clean and fresh. This innovative device is equipped with various smart sensors that monitor your pet's toilet activity and activate to automatically clean after use. The device connects to the sewer system and ensures efficient waste removal without the need for intervention from the owner. Additionally, the toilet has a large flushable storage capacity, making it ideal for multi-cat households. The Petgugu cat litter bowl is designed for use with water-soluble litters and offers a range of additional ... >>

The attractiveness of caring men 14.04.2024

The stereotype that women prefer "bad boys" has long been widespread. However, recent research conducted by British scientists from Monash University offers a new perspective on this issue. They looked at how women responded to men's emotional responsibility and willingness to help others. The study's findings could change our understanding of what makes men attractive to women. A study conducted by scientists from Monash University leads to new findings about men's attractiveness to women. In the experiment, women were shown photographs of men with brief stories about their behavior in various situations, including their reaction to an encounter with a homeless person. Some of the men ignored the homeless man, while others helped him, such as buying him food. A study found that men who showed empathy and kindness were more attractive to women compared to men who showed empathy and kindness. ... >>

Random news from the Archive

Antidepressants for alcoholism 10.02.2018

Scientists at the University of Queensland in Australia have found that certain antidepressants can reverse the harmful effects of alcohol on brain cells.

Experts set up an experiment on adult mice. They were given alcohol in large quantities for 15 weeks, which led to a deterioration in the ability of the brain to produce new cells, neurons. After two weeks of daily treatment with tandospirone, the scientists were able to restore the initial performance and neutralize the harmful effects of alcohol.

The authors of the work recalled that the danger of excessive alcohol consumption is that it interferes with neurogenesis - the production of new brain cells.

"Our experiments in mice have shown that tandospirone promotes neurogenesis, but for the first time it has been demonstrated that it can completely reverse alcohol-induced disruption of this process," said lead neuroscientist Professor Selena Bartlett.

In addition, scientists have shown that the antidepressant alleviates the anxiety syndrome that is characteristic of refusing to drink alcohol after drinking it frequently.

Other interesting news:

▪ Ford Glare-Free Highbeam headlight system

▪ Hybrid ATV Krampus

▪ Microcontrollers STM32 Value Line

▪ Edible cheese capacitors and energy

▪ World's largest bacterium discovered

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ site section Power Amplifiers. Article selection

▪ article Lost Illusions. Popular expression

▪ article Where did the different breeds of dogs come from? Detailed answer

▪ article Documentation. Job description

▪ article Stepper motor driver with microstepping mode. Encyclopedia of radio electronics and electrical engineering

▪ article On the difficulties of modernizing TVs. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

All languages of this page

Home page | Library | Articles | Website map | Site Reviews