Phanuphong Steel and Plates is a well-respected manufacturer and supplier based in Bangkok, Thailand, known for providing top-notch steel products and fittings that cater to a variety of industrial needs. Among their impressive lineup, the Alloy Steel WP91 Pipe Fittings stand out for their remarkable durability, strength, and adherence to international standards. These fittings are engineered to handle extreme pressure and high temperatures, making them essential in sectors like oil, gas, petrochemicals, power generation, and refineries. With a commitment to quality, prompt delivery, and cost-effectiveness, Phanuphong Steel has built a reputation as a dependable partner for global infrastructure and energy projects.
The Alloy Steel WP91 Pipe Fittings are primarily made up of chromium and molybdenum, with additional elements like carbon, manganese, phosphorus, sulfur, and vanadium to boost their performance. This unique blend gives them exceptional strength at high temperatures, resistance to corrosion, and long-lasting durability. On the mechanical side, they boast a minimum yield strength of about 275 MPa and a tensile strength that falls between 585 and 760 MPa. These fittings also provide excellent hardness, toughness, and resistance to oxidation and creep. Their strong mechanical properties make Alloy Steel WP91 Pipe Fittings perfect for challenging environments where reliability, efficiency, and a long service life are crucial.
Specifications : ASTM A234 / ASME SA234
Dimensions : ASME/ANSI B16.9, ASME B16.28, MSS-SP-43
Size : 1/8” NB TO 48” NB. (Seamless & 100% X-Ray Welded, Fabricated)
Type : Seamless / Welded / Fabricated
Bending Radius : R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom
Thickness : Sch 5s, Sch 10s, Sch 40s, Sch 80s, Sch 160s, Sch XXS
| Grade | C | Mn | Si | S | P | Cr | Mo |
| A234 WP91 | 0.08-0.12 | 0.3-0.6 | 0.2-0.5 | ≤0.02 | ≤0.015 | 8-9.5 | 0.85-1 |
| Grade | Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation % |
| A234 WP91 | ≥590 | ≥415 | ≥20 |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Alloy Steel WP91 Pipe Fittings are widely utilized in high-pressure and high-temperature settings, such as boilers, heat exchangers, superheaters, and steam pipelines. Industries like power generation, refining, chemicals, and petrochemicals depend on them for critical piping systems that demand superior performance. They’re also commonly found in turbine systems and industrial equipment where durability and strength under thermal stress are vital. Thanks to their excellent weldability and mechanical strength, they are well-suited for complex fabrication and structural applications. With outstanding resistance to creep, oxidation, and corrosion, Alloy Steel WP91 Pipe Fittings truly excel in demanding conditions.
Phanuphong Steel is a leading manufacturer, supplier and exporter of high-quality Carbon Steel, Alloy Steel, Mild Steel and Galvanized Steel products. Our extensive product range includes Pipes, Tubes, Flanges, Pipe Fittings, Forged Fittings, Sheets and Plates, catering to various industries in Bangkok, Thailand.
Copyright 2025 Phanuphong Steel. All rights reserved
