1. What is a pressure vessel?

A pressure vessel is a closed device containing a gas or liquid and bearing a certain pressure. Application scope is defined as: (1) maximum working pressure is greater than or equal to 0.1 MPa (pressure) gas, maximum working temperature is higher than or equal to the standard boiling point of the liquefied petroleum gas and liquid, the volume is greater than or equal to 30 l and inner diameter (non circular cross section in the cross section of the largest geometry size) is greater than or equal to 150 mm of fixed and mobile container; (2) Gas, liquefied gas and liquid with standard boiling point equal to or below 60℃, rated working pressure greater than or equal to 0.2MPa (measured pressure), pressure and volume product greater than or equal to 1.0MPaL gas cylinder; For rapid cooling.

2. What are the differences between using and managing simple pressure vessels and ordinary pressure vessels?

(1) Ordinary pressure vessels must be registered, simple pressure vessels do not need to be registered.

(2) Ordinary pressure vessels shall be inspected by special equipment inspection and testing institutions. Simple pressure vessels shall be regularly serviced and inspected by the user during the recommended service life. Only when abnormal conditions are detected, special equipment inspection and testing institutions should be invited for inspection; Simple pressure vessels that have reached the recommended service life must be scrapped. If repeated use is required, regular inspections should be carried out in accordance with the Rules for Periodic Inspection of Pressure Vessels.

3. What conditions must a simple pressure vessel meet?

① The container is composed of a cylinder, a flat head, a convex head (without a spherical crown head) or two convex heads;

② Cylinder, cylinder head and nozzle and other main pressure parts of the material for carbon steel and austenitic stainless steel;

③ The design pressure is less than or equal to 1.6Mpa; ④ The volume is less than or equal to 1000L;

⑤ the product of working pressure and volume is greater than or equal to 2.5MPa·L and less than or equal to 1000MPa·L;

⑥ the medium is vapor evaporated from air, nitrogen and medicinal distilled water; ⑦ The design temperature is greater than or equal to -20℃, the highest working temperature is less than or equal to 150℃;

⑧ Do not directly use flame welding containers.

4. When will the Simple Pressure Vessel Safety Monitoring Regulations come into effect?

The safety monitoring of simple pressure vessels has been effective since July 1, 2007.

5. What does regular inspection of pressure vessels include?

Annual inspection, comprehensive inspection and resistance voltage test.

6. Why should we strengthen the safety training of pressure vessels?

① Pressure vessel is widely used, the consumption rate increases;

(2) the accident rate is high, the accident consequence is particularly serious, the explosion is catastrophic;

③ Shock wave damages equipment, buildings or directly injures people;

(4) Personal injury caused by equipment and building debris or failure;

⑤ Medium overflow can cause poisoning, burning, explosion and scald and other chain reactions.

7. Why pressure vessels are prone to accidents (the reason for the high accident rate?)

(1) pressure and temperature resistance;

② Contact with corrosive media;

(3) Complex local stress;

④ It often hides serious defects;

Continuous operation is not easy to check;

⑥ The use management does not meet the requirements.

8. Classification of pressure vessels?

According to the characteristics of use, it can be divided into fixed pressure vessels and mobile pressure vessels. Mobile pressure vessels are divided into cylinders, cylinders and tankers according to their intended use.

9. What is a gas cylinder?

In general, closed containers, metallic or non-metallic, of the type used for the storage and transportation of permanent gases, liquefied gases, and dissolved gases of a volume not exceeding 1000L (usually 35 to 60l) are called gas cylinders

10. What type of cylinder?

According to the gas cylinder structure is divided into seamless gas cylinder, welded gas cylinder and dissolved acetylene gas cylinder;

According to the state of the working medium, it can be divided into permanent gas cylinders, liquefied gas cylinders and dissolved acetylene cylinders.