... tubes. 2) Standard: API, ANSI, ASME, JIS, DIN 3) As customer requirement 4) Surface treatment: Transparent oil, rust-proof oil, hot ... galvanizing 5) Price: Very competitive 6) Special design availableOur products are used in oil, gas, chemistry, electric, shipbuilding ... , DIN, and JISB. We also provide non-standards products as customer design. elbow