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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 …

1. General Tolerances for All Fittings of ASME B16.9 *All dimensions are in mm unit. NPS: Nominal Pipe Size; DN: Nominal Diameter. *O.D: outside diameter at bevel; I.D: inside diameter at end; Both P & Q are angularity tolerances. *A …

The P92 steel, also known as 9Cr-2W, is designated as UNS K92460. It may be used for the construction of ASME BPVC Section I and Section III, Division 1 according Code Case 2179-8. The P92 steel can be furnished in …

1. The Tensile Test Results for ASTM A335 P92 Pipe Bends The mechanical properties of the four pieces of ASTM A335 P92 pipe bends shall be tested and reviewed. It includes tensile strength, yield strength, elongation, as well as the …

1. General Introduction For 600 MW and 1000 MW power plant electric-unit, the P92 alloy steel is widely applied in super-critical main steam line or reheating steam line. It can be furnished in accordance with ASTM A335 P92, ASME SA335 …

1. The Development of ASTM A335 P92 In order to improve the heat efficiency of reheating steam pipeline in power plant, the reheating-temperature can be designed as high as 621°C, which is known as the super-critical temperature. The Unite States firstly …

Designated as UNS K11597, ASTM A335 P11, is also known as 1.25Cr-0.5Mo. Generally, its minimum tensile strength and yield strength are respectively 415 MPa and 205 MPa at room temperatures. However, its tensile & yield strength values in different elevated …

Due to the poor weldability and cold-cracking susceptibility, there is high risk of cold cracking during the welding of ASTM A335 P11 seamless pipes. Several special measures shall be taken during the welding process and relative inspection shall be conducted …

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