2　Normative References

The following references are essential to this Standard.While for those with date noted，only their revisions noted with date shall be applicable to this Standard and for those without date noted，their latest revisions（including their all amendments）shall be applicable to this Standard.

GB/T 699　Quality carbon structural steels

GB/T 700　Carbon structural steels

GB 713　Steel plates for boilers and pressure vessels

GB/T 985.1　Recommended joint preparation for gas welding，manual metal arc welding，gas-shield arc welding and beam welding

GB/T 985.2　Recommended joint preparation for submerged arc welding

GB/T 1220　Stainless steel bars

GB/T 3077　Alloy structure steels

GB/T 3274　Carbon structural and low alloy steel-hot-rolled plates and strips

GB 6479　Seamless steel tubes for high-pressure chemical fertilizer equipments

GB/T 8163　Seamless steel tubes for liquid service

GB 9948　Seamless steel tubes for petroleum cracking

GB/T 14976　Stainless steel seamless tubes for liquid transport

GB 24511　Stainless steel plate，sheet and strip for pressure equipments

GB 50009-2012　Load code for the design of building structures

GB 50128　Code for construction and acceptance of vertical cylindrical steel welded storage tanks

NB/T 47008　Carbon and alloy steel forgings for pressure equipments

NB/T 47010　Stainless and heat-resisting steel forgings for pressure equipments

NB/T 47015　Welding specification for pressure vessels

JB/T 4730　Nondestructive testing of pressure vessels

JB/T 4736　Reinforcing pad