| ANSI B 16.9 | Wrought Steel Buttwelding Fittings |
| ANSI B 16.28 | Wrought Steel Buttwelding Short Radius Elbows & Returns. |
| ANSI B 16.11 | Forged Steel Fittings Socket Welding & Threaded. |
| ANSI B. 16.5 | Pipe Flanges and Flanged Fittings |
| ANSI B. 16.25 | Butt Welding/ Bevelled Ends |
| MSS SP-43 | Wrought Stainless Steel Buttwelding Fittings. |
| MSS SP-75 | High Test Wrought Buttwelding Fittings |
| BS 1640 | Steel Butt Welding Pipe Fittings for the Petroleum Industry |
| ASTM A105 | Carbon Steel forgings for piping Applications. |
| ASTM A 181 | Carbon Steel forgings for general purpose piping. |
| ASTM A182 | F Forged or Rolled Alloy Steel Pipe Flanges, Forged Fittings & Valves and parts for high temperature service. |
| ASTM A 193 | S Alloy Steel & Stainless Steel Bolting materials for High temperature Service. |
| ASTM A 194 | Carbon & Alloy Steel Nuts or Bolts for high pressure or High Temperature Service or both. |
| ASTM A 234 | Piping fittings of wrought carbon steel & Alloy Steel for moderate and High temperature service. |
| ASTM A 266 | Carbon Steel Forgings for Pressure Vessel Components |
| ASTM A312 | Seamless & Welded Austenitic Stainless Steel Pipes. |
| ASTM A 333 | Seamless & Welded Steel Pipe for Low Temperature Service |
| ASTM A 335 | Standard Specification for Seamless Ferritic Alloy steel pipe for High Temperature service. |
| ASTM A 350 | Carbon & Low Alloy Steel forgings, requiring notch toughness testing for piping components. |
| ASTM A 387 | Specification for Pressure Vessel Plates, Alloy Steel, Chromium- Molybdenum |
| ASTM A 403 | Wrought Austenitic stainless steel piping fittings. |
| ASTM A420 | Piping fittings of wrought carbon steel and alloy steel for low temperature service |
| API 5L | Line Pipes |
| API 5LX | High Test Line Pipe |
| ASTM A 515 | Standard specifications for Pressure Vessel Plates, Carbon Steel, for intermediate and Higher Temp. service. |
| ASTM A 516 | Standard Specifications for Pressure Vessel Plates Carbon steel for Moderate and Lower temp services. |
| ASTM A 517 | Standard specifications for Pressure Vessel Plates Alloy Steel High Strength Quenched & Tempered. |
| ASTM A 694 | Specification for Carbon & Alloy Steel forgings for pipe flanges, fittings, valves & parts for high pressure transmission service. |
| ASTM A 860 | Specification for wrought High Strength Low Alloy Steel butt welding fittings. |
| IS 2002 | Specification for steel Plates for Boilers. |
| IS 2062 | Specification for weldable structure steel. |
IS 1239
IS 3589 | Mild Steel Tubes Tubulars & other wrought steel fittings |
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