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Large Diameter Carbon Steel Elbow DN400 custom

Large Diameter Carbon Steel Elbow DN400 Manufacturers

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Heavy-Gauge Large Diameter Carbon Steel Elbows

Large diameter elbows represent some of the most technically demanding components in industrial piping, requiring heavy forming equipment, precise dimensional control, and rigorous non-destructive testing to ensure the structural integrity of major pipeline systems. Our Large Diameter Carbon Steel Elbows, from DN400 (16 inches) and above, are manufactured using hot induction bending or heavy mandrel-press forming processes to achieve the consistent wall thickness and smooth internal profile required for high-volume fluid transport. Manufactured from ASTM A234 WPB or high-yield WPHY grades, these large elbows are the backbone of major water transmission mains, large-bore oil and gas gathering lines, industrial cooling water systems, and structural process piping in refineries and power plants. As a specialized manufacturer of large-diameter fittings, we have the press capacity and expertise to produce elbows up to DN1800 and beyond, in both standard and heavy-wall schedules. Every large diameter elbow is dimensionally verified by our quality team using specialized measurement equipment to ensure compliance with ASME B16.9 tolerances before release for shipment.

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Large Diameter Elbow Technical Data

ParameterSpecification Detail
Material GradesASTM A234 WPB/WPC, MSS SP-75 WPHY 52/60/65, A420 WPL6
Design StandardASME B16.9, MSS SP-75, DIN 2605
Size RangeDN400 (16") to DN1800 (72") and larger
Wall ThicknessSchedule STD, XS, and custom heavy wall
Bend Angles45°, 90° (LR and SR), 180° and custom angles
NDT TestingRT (Radiography), UT (Ultrasonic), MT (Magnetic Particle)

Large-Scale Infrastructure Applications

Large diameter carbon steel elbows are essential infrastructure components across many major industrial sectors. In municipal water supply and transmission systems, DN400 to DN1200 elbows route large-bore water mains around obstacles, under roads, and into pumping stations. Power plant cooling water systems use large elbows for the circulating water intake and discharge headers connected to cooling towers and condensers. Oil refinery crude oil feed systems and product distribution headers use large-diameter WPB elbows for the main process flow routing within the battery limits. Gas processing plants use DN400+ elbows for main gas gathering headers and plant inlet manifolds. Offshore platform topsides piping for seawater firewater and cooling systems commonly use large-diameter stainless or carbon steel elbows for main header routing. Steel mill and mining operations use them in large-bore slurry pipelines, compressed air mains, and cooling water circuits serving major production equipment.

Large Diameter Manufacturing Advantages

  • Specialized Heavy-Press Capability: Our heavy-duty forming equipment handles large-diameter billets that require significantly higher press forces than standard-size fittings, ensuring consistent dimensional quality.
  • Wall Thickness Control: Precision forming processes maintain uniform wall thickness at the extrados (outer radius) of large elbows, which is the highest-stress location and must meet the minimum thickness requirements of ASME B16.9.
  • Full NDT Verification: All large-diameter elbows are subject to mandatory non-destructive testing including radiographic and ultrasonic inspection to ensure freedom from internal defects before dispatch.
  • Custom Geometry Capability: We can produce non-standard bend angles, multi-plane bends, and custom heavy-wall specifications for bespoke large-diameter pipeline designs.

Heavy-Lift Logistics & Project Supply

We support payments via T/T and Irrevocable L/C at sight. Large diameter elbows are heavy, high-value components requiring specialized logistics management. All elbows are coated with anti-rust primer and their beveled ends are protected with heavy-duty steel or plastic caps. We use custom-designed, reinforced wooden cradles and steel-banded pallets to secure large elbows during sea freight and prevent deformation. For projects requiring multiple large elbows, we offer phased delivery scheduling aligned to construction and fabrication milestones. Complete project documentation is provided, including 3.1 Mill Test Certificates, dimensional inspection reports (including back-wall thickness measurements), and all applicable NDT test records. Our export team is experienced in the special handling and documentation requirements for oversized and overweight freight shipments to global project sites.

  • Q: Are large diameter elbows above DN600 available as standard stock items?
  • A: Very large diameter elbows (DN600 and above) are typically manufactured to order due to the wide variety of wall schedules, bend angles, and material grades specified by different projects. We maintain inventory of common DN400 and DN500 sizes and can quote rapid lead times for larger diameters from our raw material stock.
  • Q: What non-destructive testing is standard for large diameter carbon steel elbows?
  • A: As standard, we perform 100% visual inspection and dimensional check on all large elbows. For wall thickness verification, UT (ultrasonic testing) is performed at the extrados. For higher-grade applications, radiographic testing (RT) and magnetic particle inspection (MT) are also available and can be specified in the order.
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Jiangyin Gaoxin Pipe Fittings Co., Ltd.
About Us
JIANGYIN GAOXIN PIPE FITTINGS CO.,LTD.
Our company is a professional manufacturer of pressure piping components. As Large Diameter Carbon Steel Elbow DN400 Manufacturers，Our product range covers butt-weld, socket-weld, and threaded pipe fittings, including flanges and customized non-standard parts. These products are widely used in industries such as oil & gas, chemical processing, power generation, shipbuilding, papermaking, metallurgy, pharmaceuticals, and food processing. We manufacture according to standards such as ASME, EN,JIS,DIN,ANSI,GOST, MSS, GB/T,HG, DL, SH, SY,and have a complete range of inspection equipment, a strict quality control system, and various certifications（PED,AD2000,EAC, ABS,BV, DNV,NORSOK M650, ISO9001,ISO14001,ISO45001,etc.）, making us a leader in the industry.

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