Marzouk Steel, headquartered in Tunis, Tunisia, is a trusted manufacturer and supplier of high-quality steel products, serving industries that demand strength, durability, and precision. Among its specialized offerings are Alloy Steel WP91 Pipe Fittings, engineered for high-pressure, high-temperature, and critical piping applications. Manufactured using advanced forging and forming technology with stringent quality control, WP91 fittings provide exceptional tensile strength, toughness, and corrosion resistance. Marzouk Steel ensures that every WP91 pipe fitting meets international standards, offering engineers and fabricators reliable solutions for power generation, petrochemical plants, oil and gas pipelines, and heavy industrial piping systems.
Alloy Steel WP91 Pipe Fittings are made from high-grade chromium-molybdenum-vanadium (Cr-Mo-V) alloy steel, designed for superior tensile strength, hardness, and thermal stability. Their chemical composition, including carbon, chromium, molybdenum, and vanadium, enhances toughness, impact resistance, and fatigue strength. WP91 fittings undergo precise heat treatment to optimize yield strength, tensile strength, and toughness. Designed to maintain structural integrity under high-pressure and high-temperature conditions, these fittings are ideal for demanding industrial, petrochemical, and power generation applications where long-term reliability and performance are essential.
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 used in industries requiring durable and high-performance piping connections. They are commonly applied in boilers, heat exchangers, turbines, petrochemical plants, oil and gas pipelines, and heavy industrial machinery. Engineered to withstand extreme pressures, elevated temperatures, and cyclic mechanical loads, WP91 fittings ensure secure, leak-proof connections. Engineers and fabricators rely on these fittings for critical applications where safety, durability, and operational efficiency are essential. Their combination of mechanical strength, toughness, and corrosion resistance ensures dependable performance in demanding industrial and energy-related environments.
Marzouk 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 Tunis, Tunisia.
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