All of materials used for construction of the steam boiler for best design should refer to ASME Code (American Society of Mechanical Engineers) because ASME Code takes high care to ensure the quality of the material. All of specification materials with classification of temperature design of material, allowable pressure, corrosion, manufacturing tolerance, erosion, wear and tear can be seen in ASME Boiler and Pressure Vessel (ASME BPV) Code Section II Parts A, B, C, and D. While for design and do calculation steam boiler refers to ASME BPV Section I.
ASME BPV Section II consists of four separate books:
1. ASME BPV Section II Part A: Ferrous Material Specifications
This code provides ferrous material specification that is safe for use on pressurized equipment.
2. ASME BPV Section II Part B: Nonferrous Material Specifications
This code provides nonferrous material specification that is safe for use on pressurized equipment.
3. ASME BPV Section II Part C: Specification for Welding Rod, Electrodes, and Filler Metals
This code provides filler metal procurement guidelines, specification for carbon, stainless and low alloy steel electrodes for shielded metal arc welding, specification for carbon and low alloy steel rods for oxyfuel gas welding, welding shielding gases, and so on.
4. ASME Section II Part D: Properties
This code provides properties of material such as stress tables, physical properties tables, chats and tables for determining shell thickness of components under external pressure.