... 3.Standard: ASME, ANSI, JIS, DIN, EN10253 pipe fitting Elbow1)Carbon steel fitting and alloy steel fitting2)Standard: ASME, ANSI, JIS, DIN, EN102533)Material ... : 20#, alloy steel, A106, A53, A2344)Size: 1/2''-48 ... )Surface treatment: Transparent oil, rust-proof oil, hot galvanizing pipe fitting