Integral Flanges manufacturer & supplier in China: One type of special weld neck flange.

Integral flange is actually a long weld neck flange its structure and production process decide it has some advantages compare with other types of flanges. It is an one-piece flange composed of flange and pipe.

  • Produced through forging one whole material to get high strength and rigidity.

  • One-piece structure avoids effectively the leakage.

  • Reliable raw material and special process provide long service life.

  • Perfect rigidity and particular connection way make its high reliability and security.

What is Integral Flange?

Integral flange (long weld neck flange) is a connecting device that is composed of a welded steel pipe and a flat disk. It is a connector with the advantages of flexibility and reliability, which has been widely used because of its structural characteristics and wide application fields.

Long weld neck flange has a long neck at the welded pipe opening, which plays the function of good connection, making the structure of the flange more flexible and reliable, while improving the bearing capacity of the flange. Furthermore, its welding is very reliable, and can withstand high levels of torque.

The Integral flange (long weld neck flange) also has the advantages of corrosion resistance, high temperature resistance, etc. It is suitable for chemical, petroleum, metallurgy and other industrial production, as well as suitable for various hydraulic pipelines, HVAC and chemical production fields.

Applications

Integral flanges are widely used for the pipeline connections of petroleum & gas, petrochemical, water engineering, ship building, seawater cleaning, construction etc.

Technical Specifications

Integral flange has many sizes no matter for carbon steel or stainless steel. The following information is just about their sizes and tolerances.

The types of Integral Flange according to material

Carbon steel Integral Flange ( long weld neck flange)

Carbon steel integral flange is usually used in medium and low pressure piping systems. It is often used in pairs, and in use should choose appropriate pressure flanges to connect the pipes, that is, add a sealing ring between two flanges, then tighten them with bolts.

Stainless steel Integral Flange ( long weld neck flange)

Stainless steel is strong and difficult to wear, the stainless steel integral flange has the advantages of corrosion resistance, good rust prevention, high mechanical strength and high tensile strength, which can meet the needs of architects and structural designers.

Alloy steel Integral Flange ( long weld neck flange)

Alloy steel integral flange has the advantages of excellent mechanical properties, corrosion resistance, welding properties and processing properties. Due to its add alloying elements, it is easier to form high-quality welds during the welding and making the welding more reliable.

The types of Integral Flange according to shape

long weld neck Flanges

Long weld neck"LWN": It is the commonest integral flange applied to industries the pressures include class 150, class 300, class 400, class 600, class 900, class 1500, class 2500.

Heavy barrel Flanges

Heavy barrel "HB": heavy barrel flange is produced according to ASME B16.5 as well. The size is from ½ inch to 24 inch and the pressure is class150 to class2500.

EQUAL BARREL Flanges

EQUAL BARREL "E": Equal barrel “E” has different shape and the wall thickness of the connected pipe is thicker. The pressure is also class150 to class2500.

Features

Integral flanges have several advantages over other types of flanges, such as weld necks. These advantages include:

Strong corrosion resistance

Integral flanges are manufactured from high-quality raw materials with corrosion resistance. They are able to work under various corrosive conditions, such as chemical and petroleum production fields.

Dependable

Integral flange plays an important connection role. Its reliable structural design can withstand high pressure, high temperature, high strength torsion and other extreme conditions, to ensure the safe operation of the system.

Wide range application

The integral flange is available in various occasions, such as hydraulic pipes, HVAC and chemical production fields.

Convenient construction & maintenance

The integral flange can be simple and convenient maintenance, reduce operating costs, improve work efficiency and production efficiency.

Integral Flanges Customization

Customization is available. Metleader can provide flexible customized production service according to the drawings or technical data from clients to meet special requests.

Comparisons

  • Famous steel pipe factories TPCO, Bao Steel etc

  • Production test – 100% test

  • Non-conforming products – Reject

  • NDT – 100% inspect

  • Customized service – available

  • Final inspection – 100% inspect

Other supplier

  • Local small factories raw material

  • Sampling test

  • Non-conforming products: Repair

  • Sampling test

  • Not sure

  • Sampling test

Quality Assurance

1）To choose the raw material from reliable steel manufacturers or suppliers, and all materials before enter our factory must do the test for chemical analysis and mechanical property.

2）All products in each production chain have special QC person to check the dimensions, heating and forging temperature, and sampling test of mechanical property.

3) Heat treatment is very important process during the production of flanges especially for carbon steel flanges with high pressure, for alloy steel and stainless steel is obligatory.

4）Full inspection or sampling inspection of NDT for the final products to ensure the inside of flanges doesn’t have any defects.

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