Description / Scope

This standard applies to steel welded vessels and apparatus (hereinafter referred to as vessels) operating under the pressure of not more than 21 MPa, under vacuum with the residual pressure of at least equal to 665 Pa (5 mm Hg) or non-pressure vessels and apparatus with the wall temperature of not less than minus 70ºC designed for implementation in processing plants of chemical, petrochemical, petroleum refining industry, petroleum industry, gas and other branches of industry.
This standard establishes main technical requirements to design, materials, production (rework), test methods, acceptance and delivery, reconstruction, repair, assembly of vessels and apparatus.
This standard does not cover:
- the vessels operating under the vacuum with the residual pressure of below 665 Pa (5 mm Hg);
- the vessels designed for transportation of petroleum and chemical products;
- cylinders for compressed gases, liquified gases and dissolved gases;
- tube furnaces;
- reservoirs (tanks) for storage of chemical and petroleum products designed in accordance with the construction norms and the special rules.
In addition to the requirements of this standard, follow the norms and the rules on industrial safety.