GB/T 16672 Welds--Working positions--Definitions of angles of slope and rotation
GB/T 18591 Welding--Guidance on the measurement of preheating temperature,interpass temperature and preheat maintenance temperature
GB/T 25774.1 Examination of welding materials Part 1: Preparation of mechanical properties specimens of steel, nickel and nickel alloy deposited metals*, 2023-11-27 Update