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Non-Critical Piping Lap Joint Flange custom

Non-Critical Piping Lap Joint Flange Manufacturers

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Material & Process Introduction

Lap Joint Flange – Flexible, Cost-Effective Two-Part Flanking System for Non-Critical Piping.

The Gaoxin Integrity Standard: Precision ring Forging and customized Heat Treatment for Loose-Plate backing Flanges At Jiangyin Gaoxin, our Lap Joint Flanges, which act as backing rings for lap joint stub ends, are manufactured using advanced ring forging or specialized plate cutting and forming techniques. The critical aspect of our process is ensuring optimal flat sealing surfaces and precise bolt hole alignment on the loose flange, allowing for effortless rotation around the pipe. We utilize a vast array of high-grade raw materials, primarily carbon and alloy steels for cost efficiency, as the flange itself does not contact the process fluid. For specialized environments, we also process high-performance stainless steels. Our specialized 321/321H (UNS S32100/S32109) grades undergo stabilized heat treatment to ensure exceptional metallurgical stability and corrosion resistance, primarily in high-heat service. Precise CNC machining follows to guarantee exact dimensional tolerances for seamless system integration.

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Lap Joint Flange Technical Specifications

ParameterSpecification Detail
Material GradeUNS S32100/S32109
Design StandardASME B16.5, EN 1092-1
Pressure ClassClass 150, Class 300
Testing / InspectionPositive Material Identification (PMI)

Specification Range

Comprehensive Dimensional Capabilities, Global Standards Compliance, and customized Engineering Solutions Leveraging over 35 years of dedicated manufacturing expertise, Jiangyin Gaoxin produces Lap Joint Flanges across an extensive dimensional matrix to satisfy diverse global project requirements. Our standard offerings cover nominal pipe sizes starting from DN15 (1/2") running all the way up to DN1500 (60") for large-scale industrial infrastructure. We manufacture flanges in multiple pressure classifications, primarily Class 150, Class 300, and Class 600, adhering strictly to international standards such as ASME B16.5 and European EN 1092-1. We possess the robust in-house infrastructure to deliver customized, non-standard flange thicknesses, bolt patterns, and specialized configurations based on bespoke customer drawings and critical project dimensional tolerances for non-standard pipe connections.

Structural Superiority: Four Core Pillars of the Gaoxin Flexible Flanking System

Investing in Jiangyin Gaoxin’s Lap Joint Flanges guarantees a failure-resistant solution for complex piping networks requiring frequent maintenance or substantial cost savings. Our fittings provide four core commitments.

  • Rigorous Testing & Inspection: the two-part design permits the loose backing flange to rotate freely, facilitating effortless bolt hole alignment and simplifying installation in confined spaces.
  • Superior Structural Integrity: our superior forging process delivers high mechanical strength and fatigue resistance, essential for thermal cycling and high-vibration environments.
  • High-Temperature Stability: precise dimensional control—particularly for our critical 321/321H grades—retains exceptional metallurgical stability and high-temperature corrosion resistance.
  • Proven Manufacturing Capability: our rigorous quality control, including Positive Material Identification (PMI), ensures unwavering metallurgical soundness, upholding our brand promise of delivering "Safe, high-integrity pressure containment."

Application Scenarios

Serving the Industrial Pulse: Connecting Vital Systems in rigorous High-Stress Operations Jiangyin Gaoxin's Lap Joint Flanges are critical flanking components deployed in the vital industrial heart of high-pressure and high-temperature systems globally, typically in non-critical piping networks demanding ease of maintenance and material cost optimization. In the hydrocarbon processing industry, they are indispensable for critical control valve stations, heat exchanger connections, and severe process piping within catalytic cracking and hydroprocessing units, managing volatile fluids where leak integrity is paramount. Within the conventional and nuclear power generation sectors, our lap joint flanges connect crucial steam sampling lines, feedwater control systems, and pneumatic utility networks, particularly in supercritical boiler systems operating under extreme pressure surges. Furthermore, in shipbuilding, offshore platforms, chemical processing, and pharmaceutical manufacturing utility lines, Jiangyin Gaoxin fittings provide the structural reliability necessary to ensure global engineering and operational integrity.

  • Q: What size and pressure range is available for Lap Joint Flange?
  • A: We supply Lap Joint Flange covering Class 150, Class 300 pressure ratings, manufactured according to project specifications.
  • Q: What materials and standards apply to Lap Joint Flange?
  • A: We manufacture Lap Joint Flange in materials such as UNS S32100/S32109 and to standards including ASME B16.5, EN 1092-1, with full material traceability available on request.
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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 Non-Critical Piping Lap Joint Flange 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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