A234 Wp91 Caps,SA234 Wp91 caps,ASME B16.9,A234 Wp91 Pipe Fittings
We are the professional manufacturer and exporter of ASTM/ASME A234/SA234 Wp91 Pipe caps, X10crmovnb9-1 Caps in China.
What Is an ASTM A234 WP91 Cap?
An ASTM A234 WP91 cap ,functionally like the A182 F91 Blind flanges Butt welded chome moly steel fitting designed to seal the end of a pipe run in high-temperature applications. WP91 offers enhanced strength and creep resistance at temperatures up to 750 °F (400 °C).
SA234 WP91 is a ferritic alloy steel that has very high strength properties, which do not deteriorate with time, and are creep resistant. It is also called 9 Cr 1 Mo steel
Equivalent grade of P91 grade: T91, K90901, X10CrMoVNb9-1, 1.4903
Our A234 WP91 Caps are made seamless,formed from ASME SA 387 Grade 91 Steel Plate,through hot forming process
ASTM A234 WP91 CAPS SPECIFICATION
Specifications : ANSI/ASME B16.9, B16.28, MSS-SP-43.
Standard : ASTM A234 / ASME SA234
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Certifications: EN 10204 3.1/3.2 MTC; radiographic/ultrasonic testing available
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Sizes: NPS ½″–48″ (DN 15–DN 1200), Schedule 10–XXS
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Lead Times: In-stock standard sizes; custom dimensions on request
Type : Seamless
ASTM A234 WP91 CAPS CHEMICAL COMPOSITION
| Grade | C | Mn | P | S | Si | Cr | Mo |
| A234 WP91 | 0.08-0.12 | 0.3-0.6 | ≤0.015 | ≤0.02 | 0.2-0.5 | 8-9.5 | 0.85-1.05 |
ASTM A234 WP91 PIPE FITTINGS MECHANICAL PROPERTIES
| Element | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| A234 WP91 | ≥590 | ≥415 | ≥20 |
Heat Treatment for A234 WP91 pipe fittings
Pipe fittings of ASTM A234 alloy steel, after forming at an elevated temperature, shall be cooled to a temperature. below the critical range under suitable conditions to prevent injurious defects caused by too rapid cooling, but in no case more rapidly than the cooling rate in still air.
Grade WP91 shall be normalized at 1900 °F [1040 °C] minimum, and 1975 °F [1080 °C] maximum, and tempered in the temperature range of 1350 °F [730 °C] to 1470 °F [800 °C] as a final heat treatment.
Inspection and test for A234 WP91 pipe fittings
Except for dimensional inspection and visual examination, the inspection & tests that shall be selectively performed on ASTM A234 alloy steel pipe fittings include: liquid penetration test, magnetic particle examination, ultrasonic test, nondestructive electromagnetic(eddy current) test.hardness testng
Marking:Standard/ As per request
Packing: Wooden case(Fumigation free) Or as per request
Inspection: In house and third party
Document: MTC EN10204-3.1 can be provided prior to shipment
How to order our A234 Wp91 Caps?
Example#1,
