carbon steel reducing elbow 1.size:1/2"to 72" 2.material:carbon/stainless/alloy steel 3.ISO9001 4.competitive price 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 ...