Pipe Bend
Large Diameter Alloy Steel Pipe Bend is a hot-formed piping component manufactured from seamless or welded alloy steel pipe and used to change the direction of high-temperature and high-pressure piping systems. Hongcheng manufactures and supplies large diameter alloy steel pipe bends for power generation, refinery process piping, long-distance high-temperature pipelines and utility systems.
Product Overview
Large Diameter Alloy Steel Pipe Bend is a hot-formed piping component manufactured from seamless or welded alloy steel pipe and used to change the direction of high-temperature and high-pressure piping systems. Hongcheng manufactures and supplies large diameter alloy steel pipe bends for power generation, refinery process piping, long-distance high-temperature pipelines and utility systems.
These bends are typically produced from materials including ASTM A335 P91, A335 P22, A335 P11, GB/T 5310 12Cr1MoVG and other alloy steel grades. Material selection, bending process and heat treatment are determined according to the applicable material specification, product size and project requirements.
Hongcheng supplies large diameter alloy steel pipe bends with heat treatment performed in accordance with applicable material specifications and purchaser requirements. Full material traceability, inspection documentation and project-specific technical support are available. Custom bending radius, angles, wall thickness transitions and end preparations can be supplied according to project drawings and specifications.
Material & Heat Treatment
Large diameter alloy steel pipe bends are manufactured from alloy steel grades containing Chromium (Cr), Molybdenum (Mo), Vanadium (V), Manganese (Mn), Silicon (Si) and Carbon (C) within the limits specified by the applicable material standard.
Chromium and molybdenum contribute to the material's elevated-temperature mechanical properties and creep strength. Material suitability for specific service conditions depends on operating conditions, design requirements and applicable project specifications.
Heat treatment is performed according to the applicable material specification, qualified manufacturing procedures and purchaser requirements. Typical processing may include normalizing, tempering and other treatments specified by the material grade and applicable standard. Actual heat-treatment conditions depend on the applicable material specification, product size, bending process and project requirements.
Manufacturing Process
Raw Material Inspection → Cutting → Forming / Hot Bending → Heat Treatment → Beveling → Inspection & Testing → Marking → Packing
Formed construction is supplied according to product size, bending radius, manufacturing route and applicable specifications. For welded constructions, welding and applicable PWHT are performed according to qualified welding procedures and project requirements.
Hongcheng controls bending accuracy, heat treatment, wall thickness integrity and inspection throughout the manufacturing process to meet applicable standards and purchaser specifications.
Technical Parameters
|
Parameter |
Specification |
|
Product |
Large Diameter Alloy Steel Pipe Bend |
|
Base Material Standards |
ASTM A335, GB/T 5310 and other applicable alloy steel specifications |
|
Material Grades |
P91, P22, P11, 12Cr1MoVG and other alloy steel grades |
|
Bending Radius |
R=3D, R=5D, R=10D and Custom |
|
Bending Angle |
90°, 180° and Custom Angles |
|
End Preparation |
Beveled Ends, according to applicable standards / ASME B16.25 where applicable |
|
Dimensional Standard |
Dimensional tolerances per customer drawings & project specifications (induction hot bends are not covered by ASME B16.9) |
|
Size Range |
NPS 24–48 (DN600–DN1200), subject to size, applicable standard and manufacturing capability |
|
Wall Thickness |
SCH 40, SCH 80, SCH 160, XXS and Custom |
|
Heat Treatment |
According to applicable material specification requirements |
|
Surface |
Black Painted / Anti-Rust Oil / Natural Finish |
|
MTC |
EN 10204 3.1 available |
|
Customization |
Custom Radius, Angle, Wall Thickness and Marking Available |
Inspection & Testing
Inspection and testing are performed according to the applicable material specification, dimensional standards and purchaser requirements.
Available inspection and testing services may include:
EN 10204 Type 3.1 Material Test Certificates (MTC) can be provided according to purchase requirements. Third-party inspection and additional NDT are available upon request.
Applications
Large diameter alloy steel pipe bends are commonly used in:
• Power Plant Main Steam and Hot Reheat Piping
• Long-Distance High-Temperature Piping
• Refinery Process Piping
• Utility Boiler Systems
• High-Temperature Piping Systems
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Projects of Pipe Bend
Power Plant Projects
Products: P91 Pipes · P92 Pipes · Pipe Fittings · Pipe Spools
FAQs
What material grades are available for large diameter alloy steel pipe bends?
Large diameter alloy steel pipe bends can be manufactured from various alloy steel grades including ASTM A335 P91, P22, P11 and GB/T 5310 12Cr1MoVG. Material selection should be confirmed against the applicable design code and project requirements.
What post-weld heat treatment is required for large diameter alloy steel bends?
PWHT may be required depending on the applicable construction code, wall thickness, welding procedure and project requirements. Where welding is required, these bends should be welded using qualified procedures with preheating and PWHT applied as required by the applicable code and project specifications.
Can custom bending radius and angles be supplied?
Yes. Hongcheng can manufacture custom large diameter alloy steel pipe bends according to customer drawings and technical specifications, including custom bending radius, angles, wall thickness and marking requirements.
What standards are supported?
Large diameter alloy steel pipe bends can be manufactured from alloy steel pipe conforming to ASTM A335, GB/T 5310 or other applicable specifications. Dimensional requirements may follow ASME B16.9 or applicable GB/T fitting standards, while material, bending, heat treatment and inspection requirements are controlled according to the applicable product specification and project requirements.
Wuliyao Industrial Zone, Yanshan County, Cangzhou City, Hebei Province, China.
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