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Precision Seamless Transitions High-Performance Concentric & Eccentric Reducers custom

Precision Seamless Transitions High-Performance Concentric & Eccentric Reducers Manufacturers

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Material & Manufacturing Process

High-Performance Concentric & Eccentric Reducers | Precision Seamless & Welded Pipeline Transitions.

Manufactured in full compliance with ASME B16.9 and EN 10253 standards, our concentric and eccentric pipe reducers deliver smooth internal fluid velocity transitions across changing pipe diameters. Utilizing advanced hot-mandrel push forming, cold-hydraulic swaging, and heavy hydraulic presses up to 6,800 tons, we process a broad spectrum of certified materials. This includes carbon steel (ASTM A105, A234 WPB, A350 LF2), stainless steel (304/304L, 316/316L), duplex & super duplex alloys (S31803, S32750), and nickel-based alloys (Inconel 625, 254SMO). Fully compliant with NACE MR0175/ISO 15156 for sour service, all reducers undergo normalized heat treatment, precise CNC end-beveling, and mandatory 100% NDT inspection (UT, RT, MT, PT) to guarantee complete internal soundness.

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Product

Concentric & Eccentric Reducers Technical Specifications

ParameterSpecification Detail
Material GradeASTM A105, S31803, S32750, Inconel 625, 254SMO
Design StandardASME B16.9, EN 10253, NACE MR0175/ISO 15156
CertificationPED, AD2000, DNV, NORSOK M-650, ABS, BV, ISO, NACE MR0175, EAC
Testing / InspectionUltrasonic (UT), Radiographic (RT), Magnetic Particle (MT), Penetrant (PT)

Specification Range

Jiangyin Gaoxin Pipe Fittings Co., Ltd. supplies a wide selection of seamless and welded concentric reducers (for vertical flow) and eccentric reducers (for horizontal flow). Powered by heavy hydraulic presses with capacities reaching up to 6,800 tons, our factory fabricates high-strength components across an expansive size range. Dimensional coverage extends from small-bore lines (DN15 / 1/2") up to extra-large outer diameter fabrications reaching DN3800 (150"). Wall thickness schedules span standard Schedule 10/40/80 up to XXS and custom heavy-wall specifications up to 100mm. Advanced coordinate measurement systems rigorously verify wall uniformity, taper angle, and bevel alignment prior to shipment.

Product Advantages

Operating since 1993 under an ISO 9001 certified quality system, our company guarantees optimal hydraulic efficiency, minimal turbulence, and high fatigue endurance under severe operating pressures

  • International Certification: Our reducers hold prestigious global credentials, including PED 2014/68/EU, AD2000, EAC, NORSOK M-650, and marine classification approvals from DNV, ABS, and BV. Gradual taper contours prevent gas pocket formation in pump suction lines when using eccentric configurations
  • Full Traceability & Documentation: Every shipment is delivered with an EN 10204 3.1 Mill Test Certificate featuring full 100% heat-number raw material traceability
  • Rigorous Testing & Inspection: Combined with sea-worthy export packaging, our components safeguard client infrastructure while lowering life-cycle operating costs.

Applications

Engineered to accommodate diameter changes, regulate fluid velocity, and eliminate air binding in process piping, our reducers are vital components across global industrial processing networks. Concentric reducers are widely specified in vertical pipeline headers, steam distribution systems, and riser manifolds. Eccentric reducers are essential in pump suction piping, slurry lines, and horizontal liquid transport where vapor entrapment must be avoided. Furthermore, our NACE-compliant carbon, stainless steel, and special alloy reducers serve in offshore oil platforms, LNG terminals, oil refineries, and chemical processing plants. Their precision machining and zero-leak pressure containment guarantee continuous, safe operational performance worldwide.

  • Q: What materials and standards apply to Concentric & Eccentric Reducers?
  • A: We manufacture Concentric & Eccentric Reducers in materials such as ASTM A105, S31803, S32750, Inconel 625 and to standards including ASME B16.9, EN 10253, NACE MR0175/ISO 15156, with full material traceability available on request.
  • Q: Can Concentric & Eccentric Reducers be customized for special project requirements?
  • A: Yes, our engineering team can review drawings, material grades and inspection requirements to provide customized Concentric & Eccentric Reducers solutions for EPC and industrial projects.
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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 Precision Seamless Transitions High-Performance Concentric & Eccentric Reducers 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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