Lap Joint Flange

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Lap Joint Flange

The Lap Joint Flange redefines flexibility in piping systems, offering a dynamic solution for managing thermal expansion and contraction stresses while enabling seamless disassembly in low-pressure applications. Combining a robust flange ring with a pivoting flanged component, this innovative design allows controlled axial movement of pipelines, effectively absorbing temperature-induced shifts without compromising structural integrity. Available in two configurations—Butt Weld Ring Type (PJ/SE) for high-precision welded joints and Flat Weld Ring Type (PJ/RJ) for simplified installation—it caters to diverse operational needs while maintaining leak-proof performance. Engineered from premium carbon steel or stainless steel, the flange resists corrosion and mechanical wear, ensuring reliability in industries such as chemical processing, water treatment, and food production, where frequent maintenance or equipment upgrades are routine.

SPECIFICATIONS
product details

Diameter

DN50(2")-DN2000(80")

Pressure

0.6-2.5MPa

Certificate

PED, AD2000, EAC, ABS, BV, DNV, NORSOK M650, ISO9001, ISO14001, ISO45001, etc.

Function introduction

Combined with flange ring and flanging, allows axial displacement of the pipeline and reduces thermal expansion stress. Types: butt welding ring (PJ/SE) and flat welding ring (PJ/RJ). Suitable for low-pressure pipelines requiring frequent disassembly.

Application fields

Applicable to pipe flange connections in long-distance oil and gas pipelines, offshore platforms, chemical equipment, water treatment systems, and food and pharmaceutical industries, adapted to complex working conditions.

Packing

Seaworthy package,Plywood Cases or pallet or as per customers requirement

Featured Products

1、 Small batch minimum order;
2、Fast delivery;
3、Customized production;

Its rotating mechanism simplifies alignment during assembly, reducing labor costs and downtime in systems like hydraulic machinery, HVAC networks, or modular industrial setups. By isolating flange movement from pipeline stress, it extends the lifespan of gaskets and bolts, lowering long-term replacement expenses. From offshore platforms requiring thermal compensation to pharmaceutical plants needing sterile, easy-to-clean connections, the Lap Joint Flange ensures compliance with ASME and EN standards while adapting to evolving operational demands. Backed by rigorous testing and versatile compatibility, it empowers engineers to design resilient, future-ready infrastructure. Upgrade your piping systems today with our Lap Joint Flanges—where precision engineering meets adaptive strength, enabling your operations to thrive in dynamic environments. Choose flexibility, choose endurance, and unlock a new era of efficiency.

Our Production Process

From raw material to final delivery, we maintain rigorous control at every stage to ensure durability,performance, and consistency.

  • 01
    Cutting
  • 02
    Heating
  • 03
    Forging
  • 04
    Heat treatment
  • 05
    Rough machining
  • 06
    Non destructive examination
  • 07
    Machining by CNC lathe
  • 08
    Surface treatment
  • 09
    Final inspection
  • 10
    Marking
  • 11
    Packing
  • 12
    Shipment
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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 China stainless steel Lap Joint Flange Suppliers and Custom carbon steel Lap Joint Flange Company.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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Jiangyin Gaoxin Pipe Fittings Co., Ltd.
Lap Joint Flange
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