Carbon steel pipe elbow pipe elbow:Material: carbon steel, stainless steel,alloy steel, Aluminum alloy and so on.Standard: GB/T12459, GB/T13401, SH3408, SH3409, HG/T21635, HG/T21631, ASME B16.9, MSS SP-43, DIN 2605, JIS B2313Size:seamless fittings 1/2" - 20" (DN15 - DN500),welded fittings 1/2" - 48" (DN15 - DN1200) Wall thickness: SCH5S-SCH160 45 degree, 90 degree, 180 degree Pipe fittings