ASTM A234 WP91 Elbow 90deg LR SR ASME B16.9
High-Temperature Alloy Steel Butt Weld Elbow | ASME B16.9
ASTM A234 WP91 elbows are high-performance alloy steel butt weld fittings manufactured from 9Cr-1Mo-V-Nb steel, specifically designed for ultra-high temperature and high-pressure applications. Produced in accordance with ASTM A234 material specification and ASME B16.9 dimensional standard, WP91 elbows offer outstanding creep resistance, oxidation resistance, and long-term structural stability.
Available in 90 degree long radius (LR) and short radius (SR) configurations, WP91 elbows are widely used in supercritical and ultra-supercritical power plants, refineries, and high-temperature process piping systems.
We are a professional ASTM A234 WP91 Pipe fitting 90 Deg Elbow LR SR, 45Deg Elbow manufacturer in China
Based on our deep and professional expereince,and as one of the most professional chrome moly manufacturer in china ,we can produce high quality Chrome Moly Alloy steel pipe fittings,A234 WP91 Pipe fittings.WP91 is one of the steel grade in ASTM A234,which is made of A335 P91 Pipes,W means weldable,P means pressure,91 is grade 91. While Digital 9 is referring to the Cr content 8-9.5%.
Elbow Types – 90° LR & SR
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90° Long Radius (LR):
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Radius = 1.5 × NPS
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Lower pressure drop, smoother flow
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Preferred for high-temperature steam lines
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90° Short Radius (SR):
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Radius = 1.0 × NPS
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Compact piping layouts
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Used where space is limited
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Standard: ASME B16.9
ASTM A234 WP91 Elbow Butt Pipe Fittings Specification
ASTM A234 WP91 pipe fittings are produced from A335 P91 Seamless pipes,and it connects with A182 F91 Flange,and A335 P91 Pipes in the pipeline connections.
Product Range – ASTM A234 WP91 Elbows
We supply a full range of WP91 butt-weld elbows:
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90° Long Radius (LR) Elbow
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45° Elbow
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180° Return Bend
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Short Radius (SR) Elbow
Size Range: ½” – 48″ (DN15 – DN1200)
Wall Thickness: SCH 10 – SCH 160, XXS
Dimensional Standard: ASME B16.9
ASME B16.9 A234 WP91 Pipe fittings dimension
A234 WP91 is one of the steel grade in ASTM A234 standard.W means weldable,P means pressure,91 is grade 91.the starting material is ASTM A335 Gr P91 Seamless pipes,widely used for POWER PLANT FABRICATION,Chemical & Fertilizers, Power Generation and Nuclear Industries.
According to the standard Astm A234 A234M 2018 latest edition,
There are type 1 and type 2 in A234 WP91 grade.
We can provide Bevel end according to ASME B16.25 Buttwelding Ends
Figure 2(a)Figure 3(a) Figure 3(a),Figure 3(C)
This Standard covers the preparation of buttwelding ends of piping components to be joined into a piping system by welding. It includes requirements for welding bevels, for external and internal shaping of heavy-wall components, and for preparation of internal ends (including dimensions and tolerances). Coverage includes preparation for joints with the following: no backing rings; split or noncontinuous backing rings; solid or continuous backing rings; consumable insert rings; gas tungsten arc welding (GTAW) of the root pass.
Chemical Composition of ASTM A234 WP91 Pipe fittings:
| Grade | C | Mn | P | S | Si | Cr | Mo | Ni |
| A234 WP91 | 0.08-0.12 | 0.3-0.6 | ≤0.02 | ≤0.01 | 0.2-0.5 | 8-9.5 | 0.85-1.05 | ≤0.4 |
Mechanical properties of ASTM A234 WP91 Pipe fittings:
| Item | Tensile Strength KSI(MPa) | Yield Strength KSI(MPa) |
| A234 WP91 | 85-110(585-760) | ≥60(415) |
ASTM A234 WP91 Heat Treatment
Except when Supplementary Requirement S1 is specified by the purchaser, Grade WP91 Type 1 and Type 2 shall benormalized 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. 7.3.6
ASTM A234 WP91 Hardness
All fittings of Grade WP91 Type 1 and Type 2 shall be hardness tested and shall have a hardness of 190 HBW-250 HBW.
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
OUR MAIN EXPORT COUNTRIES
- ASIA – Thailand, Singapore, Vietnam, South Korea
- Middle East – Kuwait, Dubai, Saudi Arabia, Yemen, Qatar,Oman, Bahrain, Jordan
- Europe – United Kingdom, Italy, Belgium,
- South America – Argentina, Chile, Brazil, Colombia, Venezuela,
- Africa – Nigeria, South Africa,Sudan,Libya
How to order the ASTM A234 WP 91 Pipe fittings?
Example#1，ELBOW ASTM A234 WP 91 type 2 , 90 DEG, SMLS BW Sch160 MM , 12 INCH
Example#2 ,ASTM A234 WP91 90 Degree Elbow,LR 8 Inch, SCH 160,
Example#3, ASTM A234 WP91 90 Deg. Elbow SR, Seamless, 6 Inch SchXXS
ASTM A234 WP91 Elbow 90deg LR ASME B16.9
ASTM A234 WP91 90° long radius and short radius elbows manufactured to ASME B16.9 provide exceptional performance in ultra-high temperature and high-pressure piping systems. With superior creep strength and oxidation resistance, WP91 alloy steel elbows are the preferred solution for supercritical power plants, refineries.
