+86 13313073735 [email protected]

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Blind Flanges
Lap Joint Flanges
Slip On Flanges
Socket Weld Flanges
Threaded Flanges
Weld Neck Flanges
Contact US
+86 13313073735
[email protected]
Mengcun Hui Autonomous County, Cangzhou City, Hebei Province

Your Trusted Top Grade Lap Joint Flange Supplier From China

Whether you’re looking for single Lap Joint Flange to connect with a stub end fittings and slide over the pipe or Lap Joint Flange with Stub End, Yanhao has the Ring Lap Joint Flange in the materials you need, as well as their fittings – type A, B and C stub ends. Whether manufacturing repetitive LJ Flanges day after day or working on custom, one-of-a-kind projects, our production capacity meet your needs. We offer a wide range of Lap Joint Pipe Flanges in various materials, including stainless steel, carbon steel, alloy steel for any number of applications, as well as multiple dimensions. Browse through our selection and if you can’t find the right steel Lap Joint Pipe Flanges, give us a call/mail and we’ll be sure to help.

Lap Joint Flange (Back Up, Loose Ring or Van Stone Flange) is free to rotate when a stub end is welded to the end of the steel tube, which has the function of not allowing the steel of the lap joint flange to come into contact with the fluid that carries the pipe. Our Steel ring joint flanges are known for their excellent performance, corrosion resistance and durability. Lap joint flange is typically used for low pressure application.

  • Competitive prices, outstanding quality, superior product knowledge, strict quality inspection, hassle-free online ordering and responsive service (before and after sale).
  • Our Lap Joint Pipe Flanges are available in standard specifications, our range of flanges can also be customized according to our clients’ requirements.
  • These ANSI B16.5 Lap Joint Flanges meet the requirements of various industries such as automotive, heavy engineering, railways, and pipeline engineering.

Wholesale Top Quality Lap Joint Flanges At Competitive Price From Yanhao

Yanhao is a professional Flange supplier, mainly engaging on manufacturing various Lap Joint Flange Flanges. If you are looking for a reliable distributor to wholesale good quality ring lap joint flanges at the best price, we could be your ideal choice. We offers a wide selection of Lap joint flanges. We also wholesale various high quality Ring Joint Flanges in all shapes, materials and sizes and with any specifications that the clients. List of countries where Yanhao supplies ANSI B16.5 Ring Lap Joint Flanges: USA, Japan, Mexico, South Korea, Spain, Argentina, Colombia, Malaysia, Saudi Arabia, Turkey, United Kingdom, Taiwan, Pakistan, Spain, France, Brazil, Vietnam, South Africa, more European and American countries.

What Is Lap Joint Flange?

Lap Joint flanges, often called Back Up, Loose Ring or Van Stone Flanges, must be used with a Stub End fitted with a flange. These ring flanges are commonly produced and stocked in several different materials. The combination of the two makes its cost higher than an equivalent welded flange. The pressure resistance of such an assembly is equivalent to that of a “slip on” flange, and its resistance to fatigue is much lower than that of a welded flange flange. Their use for severely constrained services should be avoided. It is mainly used for services requiring frequent disassembly for inspection or cleaning, and where the possibility of turning the flange facilitates alignment. The flange itself not being in contact with the process fluid, it can be made of expensive carbon steel, while the flange is made of more noble material.

  • Specification of Lap Joint Flanges

    LJ Forged Flange: DN15-DN600
    Surface Treatment: Anti-rust Oil, Transparent/Yellow/Black Anti-rust Paint,Zinc,Hot dipped Galvanized.

  • Lap Joint Pipe Flange Application

    Chemical, Engineering, Construction, Oil Field, Offshore, Water System, Shipbuilding, Natural Gas, Electric Power, Manufacturing Industry, Pipe Projects etc.

  • Lap Joint Flange Materials

    Carbon Steel Flange: ASTM A105, 20#, Q235, 16Mn, ASTM A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2, ASTM A694 F42, F46, F48, F50, F52, F56, F60, F65 ,F70;
    Stainless Steel Flange: ASTM A182 F304, 304L, F316, 316L, 1Cr18Ni9Ti, 0Cr18Ni9Ti, 321, 18-8;
    Alloy Steel Flange: ASTM A182 F1, F5a, F9, F11, F12, F22, F91, A182F12, A182F11, 16MnR, Cr5Mo, 12Cr1MoV, 15CrMo, 12Cr2Mo1, A335P22, St45.8/Ⅲ;

  • Sealing Surface Types For Lap Joint Pipe Flanges

    RF (Raised Face);
    FF (Flat Face);
    M&F (Male-and-Female Face);
    RTJ (Ring-Type Joint)
    F (Female Face);
    M (Male Face);
    T&G (Tongue and Groove Face);

  • Lap Joint Flange Standards

    ANSI B16.5
    Male Face Steel Butt Weld Ring Lap Joint Pipe Flange with Neck: GB/T 9118.1-2000;
    Ring Lap Steel Joint Pipe Flange with Neck: GB/T 9118.2-2000;
    Butt Welding Lap Joint Pipe Flange: HG 20599-1997;
    Flat Welding Lap Joint Pipe Flange: HG 20600-1997;

  • Lap Joint Flange Pressure Grade

    PN0.25MPa,PN0.6MPa,PN1.0MPa,PN1.6MPa,PN2.5MPa,PN4.0MPa;

  • ANSI B16.5 Class 150 Flanges

    ANSI flanges are available at Yanhao Flange in class 150.  The ANSI flanges in the class 150 specification cover slip-ons, weld necks, lap joints, blinds, threaded and socket weld flanges.  ANSI flanges for class 150 are provided by Yanhao Flange as forgings unless otherwise specified.

  • ANSI B16.5 Class 300 Flanges

    ANSI flanges are available at Yanhao Flange in class 300.  The ANSI flanges in the class 300 specification cover slip-ons, weld necks, lap joints, blinds, threaded and socket weld flanges.  ANSI flanges for class 300 are provided by Yanhao Flange as forgings unless otherwise specified.

  • ANSI B16.5 Class 400 Flanges

    ANSI flanges are available at Yanhao Flange in class 400.  The ANSI flanges in the class 400 specification cover slip-ons, weld necks, lap joints, blinds, threaded and socket weld flanges.  ANSI flanges for class 400 are provided by Yanhao Flange as forgings unless otherwise specified.

  • ANSI B16.5 Class 600 Flanges

    ANSI flanges are available at Yanhao Flange in class 600.  The ANSI flanges in the class 600 specification cover slip-ons, weld necks, lap joints, blinds, threaded and socket weld flanges.  ANSI flanges for class 600 are provided by Yanhao Flange as forgings unless otherwise specified.

  • ANSI B16.5 Class 900 Flanges

    ANSI flanges are available at Yanhao Flange in class 900.  The ANSI flanges in the class 900 specification cover slip-ons, weld necks, lap joints, blinds, threaded and socket weld flanges.  ANSI flanges for class 900 are provided by Yanhao Flange as forgings unless otherwise specified.

  • ANSI B16.5 Class 1500 Flanges

    ANSI flanges are available at Yanhao Flange in class 1500.  The ANSI flanges in the class 1500 specification cover slip-ons, weld necks, lap joints, blinds, threaded and socket weld flanges.  ANSI flanges for class 1500 are provided by Yanhao Flange as forgings unless otherwise specified.

  • ANSI B16.5 Class 2500 Flanges

    ANSI flanges are available at Yanhao Flange in class 2500.  The ANSI flanges in the class 2500 specification cover slip-ons, weld necks, lap joints, blinds, threaded and socket weld flanges.  ANSI flanges for class 2500 are provided by Yanhao Flange as forgings unless otherwise specified.

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