API 5Lcarbon seamless steel pipe , ASTM A106 be widely used in construction,water gas transport Min order:20ton seamless steel ... :SA53B, SIZE: 1/2"-28",13.7-711.2mmHigh pressure used boiler carbon steel pipe ASTM A106 GB.R ,Steel:SA106B,SIZE ... : 1/2"-28",13.7-711.2mmApplication: widely used in construction ,installation of drainage pipes factories machining projects transport ...