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Backing Ring flanges HDPE

  • Backing Ring flanges HDPE
  • Backing Ring flanges HDPE
  • Backing Ring flanges HDPE
  • Backing Ring flanges HDPE

Backing Ring flanges HDPE

    Payment Type: L/C,T/T,D/P
    Terms of Trade: FOB,CFR,CIF,EXW,FCA
    Delivery Time: 30 Days
    Packaging: poly-pallets, poly-cases
    Productivity: 1200 tons each month
    Brand: Zhongnuo
    Transportation: Ocean,Land,Air
    Place of Origin: Jinan, China
    Supply Ability: 1200 tons each month
    Certificate: ISO9001
    HS Code: 73079100
    Port: Qingdao

Basic Info

Model No.: Backing Ring flanges HDG

Product Description

A backing ring is a small piece of material welded between two pipes. They are usually round to fit most pipes, but there are also square-shaped rings. It is also called a back-up ring or anti-extrusion ring. A typical backing ring is made of rubber or metal such as aluminum, chrome, or carbon steel. Pipe backing rings allow proper alignment between two joined pipes, hold the pipe joints together, and prevent leaks.

There are many types of backing rings, including plain rings, machine-welded rings, and gasket rings. Other, more advanced ones include grove, flat, and ridge types. The exact choice of ring depends on the application it is intended to be used for. They are used to hold pipes and fittings together in industries like automotive, construction, and aerospace.

The backing ring is placed in between the ends of two pipes to secure a joint. It is then welded so that the material is melted and fused with pipes. When used properly, it prevents the solder from penetrating through the pipes. This transforms the two pipes and the ring into one single pipe.

The quality, type, and skill of the welder are crucial factors for backing rings to be effective. The objective is to create a seamless and smooth look for the pipes. More importantly, no cracks or crevices should be left to ensure the integrity of the pipe. No welded material can be allowed to spatter and attach itself to the insides of the pipe to ensure the smooth flow of water, gas, or other chemicals.

A backing ring is a good welding piece because the joint it creates is relatively stronger than that created by direct soldering. A pipe joint backing ring supports and aligns the two pipes to make it easier for the worker to weld and fit it correctly. It has the disadvantage of leaving very small cracks and crevices not seen by the naked eye. After some time, these crevices will trap bacteria and ions, such as chloride, that will cause corrosion. Rings that are not installed correctly will break because of thermal and mechanical stress.


(1)Reasonable price with excellent quality

(2)Abundant stock and prompt delivery

(3)Rich supply and export experience, sincere service

Shandong Zhongnuo Heavy Industry Co.,Ltd.

 We are one of the most professional flange suppliers in China.The company specializes in flanges including the standards - ANSI;DIN;BS;UNI;JIS;SABS1000/3, also the custom design. It owns forging and casting factory which is well-equipped, and we have been certified by ISO 9001:2008 and PED/AD 2000-TUV, so strict control system can ensure our quality, which covers every process of the manufacturing ( raw material inspection, cutting, heating, forging, heat treatment, machining, drilling, marking, washing, final inspection, packing, delivery). High quality, reasonable price, in-time delivery is our service conceptions, which have rewarded us great amount of overseas customers now.

Company Info

  • Company Name: Shandong Zhongnuo Heavy Industry Co.,Ltd.
  • Representative: zhang Lin
  • Product/Service: Forged Flange , Forged Ring , Steel Flange , Plate Flange , Welding Neck Flange , Galvanized Flange
  • Capital (Million US $): 2.95 Million
  • Year Established: 2006
  • Total Annual Sales Volume (Million US $): US$1 Million - US$2.5 Million
  • Export Percentage: 91% - 100%
  • No. of Production Lines: 3
  • No. of R&D Staff: Fewer than 5 People
  • No. of QC Staff: 11 -20 People
  • Factory Size (Sq.meters): 30,000-50,000 square meters
  • Factory Location: Southern Part Of Haidong Industrial Park, Puji Street, Zhangqiu District
  • Contact Person: Mr. Eric
  • Tel: 86-531-83292978
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