HG/T 3179-2002 Surfacing procedure qualification and welder performance qualification for high pressure urea equipment

HG/T 3179-1988

HG/T 3179-2023 Urea high-pressure equipment welding process qualification and welder skill evaluation

HG/T 3172-2002 Urea high-pressure equipment manufacturing inspection methods - Sample preparation for testing the tendency of intergranular corrosion of ultra-low carbon chromium-nickel-molybdenum austenitic stainless steel with urea grade HG/T 3173-2002 Urea high-pressure equipment manufacturing inspection methods and test method for intergranular corrosion tendency of urea grade ultra-low carbon chromium-nickel-molybdenum austenitic stainless steel HG/T 3174-2002 Urea high-pressure equipment manufacturing inspection methods; Selection of Cr-Ni-Mo low-carbon austenitic stainless steel for urea grade; selective corrosion inspection and metallographic examination HG/T 3175-2002 Urea high-pressure equipment manufacturing inspection methods, ultrasonic detection of automatic stacking layer of stainless steel belt-fed welding JB 4708-2000 JB/T 4730.3-2005 Nondestructive testing of pressure equipments—Part 3:Ultrasonic testing JB/T 4730.4-2005 Nondestructive testing of pressure equipments—Part 4:Magnetic particle testing JB/T 4730.5-2005 Nondestructive testing of pressure equipments—Part 5:Penetrant testing JB/T 4730.6-2005 Nondestructive testing of pressure equipments—Part 6:Eddy current testing