GB/T 46150.1-2025 Boilers and pressure vessels—Part 1:Performance requirements

Scope

This document specifies the performance requirements for the construction of boilers and pressure vessels.
This document applies to the construction requirements of boilers and pressure vessels, excluding requirements for operation, maintenance, and inspection of in-service equipment.
The scope of pressure vessels is defined as follows:
a) The main body of the pressure vessel, including the bevel surface of the first circumferential joint welded (bonded) to external pipelines or devices, the end face of the first threaded joint of the pressure vessel, the first sealing surface of the flange connection, the first sealing surface of the special connection or pipe connection, the pressure-bearing cover and its fasteners of the openings of the pressure vessel, and the welding seams of non-pressurized components and pressurized components;
b) Safety accessories and instruments directly connected to the pressure vessel;
c) Non-pressurized components directly connected to the pressure vessel, such as supports, skirt supports, etc.
The scope of boilers is defined as follows.
a) The main body of the boiler, including the boiler drum (shell), start-up (steam) separator and water storage tank, heating surfaces, header tanks and their connecting pipelines, furnace, combustion equipment, air preheater, furnace wall, smoke (air) ducts, and framework (including platforms and ladders) and other components.
b) Pipelines within the boiler, including:
1) Power station boilers, including main feedwater pipelines, main steam pipelines, reheated steam pipelines, and branch pipelines within the first valve (excluding valves, the same below);
2) Boilers other than power station boilers equipped with gas (water, oil) separation cylinders (hereinafter referred to as "gas separation cylinders"), including pressurized pipelines within the first circumferential welding joint from the outlet of the water (oil) pump t

Development Information

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