This specification stipulates the requirements for material acceptance, welding procedure qualification and welder examination, welding preparation, welding procedure, post-weld heat treatment and welding inspection of low-temperature steel. This specification is applicable to the welding construction of electrode arc welding, submerged arc welding, gas tungsten arc welding, and gas metal arc welding for low-temperature steel equipment and pipelines in petrochemical, natural gas chemical and coal chemical engineering projects.
SH/T 3525-2015 history
2015SH/T 3525-2015 Welding specification of low temperature steel in petrochemical industry
2004SH/T 3525-2004 Welding specification of low temperature steel for petrochemical engineering