Raw materials: stainless steel 304, 304L, 316, 316L and 321 Size: ... ERW weld ,spiral pipe seamless pipe, flange,elbow,galvanized tube and other product).All the product have been approved by ... Flanges, Built to Different JIS Standards, Available in Various MaterialsRaw materials: stainless steel 304, 304L, 316, 316L and 321Size: 10 ... , Built to Different JIS Standards, Available in Various Materials