【行业标准】 火力发电厂金属技术监督规程

This specification is applicable to the supervision of the following metallic parts : a) High temperature pressure parts (including main steam pipe, reheat steam pipe, super heater pipe, reheater pipe, header and TEE) with working temperature greater than or equal 400 ℃, and small pipes/tubes connecting pipes/tubes and headers.b) Steam pipe and inter-connected pipe with working temperature greater than or equal 400 ℃.c) Steam water separator, water storage tank and pressure vessel of drum and once through boiler with working pressure greater than or equal 3.8 MPa.d) Pressure bearing steam water pipes/tubes and components with working pressure greater than or equal 5.9 MPa (including water wall pipe, economizer pipe, header, desuperheating water pipe, drain pipe and main water supply pipe). e) Turbine shaft, impeller, blade, larkin, bearing bush, generator shaft, retaining ring and fan blade.f) Bolts with working temperature greater than or equal 400 ℃.g) Cylinder, steam chamber, main steam valve, regulating valve, nozzle, diaphragm, diaphragm sleeve and valve shell with working temperature greater than or equal 400 ℃.h) Low temperature re-heat steam pipe with longitudinal weld for 300 MW and above units.i) Boiler steel structure.