Americal Society for Testing and Materials (ASTM) has researched and defined various material standards for oil and gas industry. Properties of these materials depend on chemical properties of fluids to be handled, design temperatures and pressure as well of method of manufacture of pipe fittings. Many materials like orifice plates, restriction orifices are made from plates as per ASTM standards. Here is a list of such ASTM Standards for plates used for fittings made from plates.
| Sr. | Number | Title |
| 1 | SA 240 | Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications. |
| 2 | SA203 | Standard Specification for Pressure Vessel Plates, Alloy Steel, Nickel. |
| 3 | SA 516 | Standard Specification for Pressure Vessel Plates, Carbon Steel, for Moderate- and Lower-Temperature Service. |
| 4 | SA 285 | Standard Specification for Pressure Vessel Plates, Carbon Steel, Low- and Intermediate-Tensile Strength. |
| 5 | SA 387 | Standard Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum. |