Technical

1. Technical Drawings for ASME B16.5 Class 150 Flanges 2. Flange & Bolting Dimensions for Class 150 All dimensions are provided in both mm and inch units. The two unit system shall be used respectively and exclusively. The bolting of …

1. The Brief History of ASME B16.5 ASME B16.5 is the standard specification for pipe flanges and flanged fittings sized from NPS 1/2 (DN 15) to NPS 24 (DN 600). It is the most widely used flange standard in piping …

The tensile and yield strength of ASTM A335 P91 steel changes at different/ elevated working temperatures. According to ASME BPVC Section II Part D, their relationships are listed in below tables. 1. Tensile Strength – Temperature Ratings of ASTM A335 …

The ASME SA335 P91/ ASTM A335 P91 seamless pipes are widely used in power plant steam piping systems. However, in engineering practice, you will find that P91 steel is designated with two UNS number: UNS K91560 and UNS K90901. This …

In pipeline engineering, the sizes of piping components are designated by two systems: NPS and DN. NPS is referred to as nominal pipe size which is the US customary system while DN is referred to as nominal diameter which is …

In order to obtain optimum weld metal in term of chemical composition and mechanical properties, the welding process and weld consumables(wire, rod, flux, electrode, etc) for T91/ P91 steel shall be carefully selected. It is very difficult to find a …

T91/ P91 steel manufactured to ASTM A335 P91 or ASTM A213 T91 is a typical tempered martensite in term of microstructure. They can be welded by many common welding methods including SMAW, SAW, GSAW(TIG/MIG), and FCAW, etc. Metals-Piping not only …

The ASTM A213 T91 seamless tubes are primarily used for boiler, superheater, and heat-exchanger. It is also an 9Cr-1Mo-V alloy steel with UNS designation K90901. Compared to its equivalent ASTM A335 P91, the chemical composition requirement of T91 steel is …

P91 is one of the steel grades specified by ASTM A335, the standard specification for seamless ferritic alloy steel pipe for high-temperature service. The maximum allowable stress in different temperature ranges shall be determined by ASME B31.1 and ASME B31.3 …

Designated as UNS K91560, the T91/ P91 steel is a 9Cr-1Mo ferritic alloy steel with deliberate addition of vanadium and niobium, as well as controlled nitrogen content. It has outstanding heat-resistance and creep strength. It also has good resistance to …

Seamless steel pipes or tubes manufactured to ASME SA335 P92 or ASME SA213 T92 are widely used in supercritical and ultra-supercritical power plant units. Postweld heat treatment for this material is mandatory. The P92/ T92 steel (UNS K92460, 9Cr-2W) shall …

The P92/ T92 seamless pipes or tubes manufactured to either ASME SA335 or ASME SA213 are widely applied in modern ultra-supercritical power plant units to improve heat efficiency. According to Metals-Piping’s engineering practice, it is most applicable to the steam-temperature …