Get Asme Section Viii, Div. 1 & Section Ix Code Seminar - Bureau Veritas

One of the main differences between Divisions 1 and 2 is that Division 2 uses lower design margins often resulting in higher material allowable stresses. Design margins are reduction factors applied to the material's ultimate tensile strength (UTS) for the purpose of setting material allowable stresses in ASME II-D.

ASME Section VIII is the section of the ASME Boiler & Pressure Vessel Code (BPVC) that covers pressure vessels. It specifically refers to the pressure vessels that operate at pressures, either internal or external, that exceed 15 psig. ASME Section I covers steam applications on fired vessels (boilers).

Pressure vessels use 3.5 to 4.0, automobiles use 3.0, and aircraft and spacecraft use 1.2 to 3.0 depending on the application and materials. Ductile, metallic materials tend to use the lower value while brittle materials use the higher values.

One of the main differences between Divisions 1 and 2 is that Division 2 uses lower design margins often resulting in higher material allowable stresses. Design margins are reduction factors applied to the material's ultimate tensile strength (UTS) for the purpose of setting material allowable stresses in ASME II-D.

Appendix M of Section VIII, Division 1 of the ASME Boiler and Pressure Vessel Code[1] provides rules for the use of isolation (stop) valves between ASME Section VIII Division 1 pressure vessels and their protective pressure relieving device(s).

ASME Standards Section VIII, Division 1 For tensile strength, the code requires a safety factor of 3.5 for non-bolting and 4 or 5 for bolting. In addition, if the product form is welded tube or pipe, a joint efficiency factor of 0.85 is typically applied. This can be seen by several of the notes in the stress tables.

Minimum requirements for safe construction and operation, per Division 1, 2, and 3. Section VIII Division 1: 15 psig < P < 3000 psig.