ฝาครอบชุบกัลวาไนซ์

TYPE : CAPS (Hot-Dipped Galvanized)
WALL THICKNESS (Sch) : 40, 80, STD, XS
STANDARD : ASTM/ASME A/SA234 WPB , ASME B16.9
GRADE :  WPB
SIZE SEAMLESS : 1/2 - 16 inch