The flange of the basic knowledge is introduced

The flange of the basic knowledge is introduced

Flange is a disk parts, pipeline engineering in the most common, flange are used in pairs. In the pipeline engineering, flange is mainly used for pipe connection. In the required to connect piping, all kinds of installed a piece of flange, low pressure pipeline can use wire joint flange, 4 kilograms or more pressure use welding flange. Two pieces of flange between plus seal points, then use bolt fastening. Different pressure flange have different thickness and use different bolt. Water pump and valve, in and pipe connection, the equipment of local, also made the corresponding flange shape, also known as flange connection. Those who in two plane in the peripheral use bolt connection and closed connection parts, generally called "flange", such as ventilation pipe connections, this kind of parts that can be called "flange parts". But this connection is only a partial equipment, such as flange and the connection of water pump, the pump not called "flange parts". Comparative small such as the valve and so on, can be called "flange parts".

Flange connection is pipeline construction of important mode of connection.

Flange connection is the two pipes and pipe fittings or equipment, first their fixed in a flange, between two flanges, plus the flange gasket, bolt together, the completion of the connection. Some pipe fittings and equipment have own flange, also belong to the flange connection.

Flange points thread connection (silk joint) flange and welding flange. Low pressure small diameter have silk joint flange, high voltage and low voltage large diameter are using welding flanges, different pressure flange thickness and connecting bolt diameter and quantity is different.

According to the pressure of different grades, flange gasket also have different materials, from the low pressure asbestos pad, high pressure asbestos pad to metal gasket has.

Flange connection easy to use and can work under great pressure.

In the industrial pipeline, the use of flange connection is very extensive. In the family in, pipe diameter is small, and it is low voltage, see flange connection. If in a boiler room or production field, everywhere are the flange connecting pipe and equipment.

Reducing flange product features: reducing flange resistance to corrosion. Surface smooth, acid and alkali resistance to high temperature, the price calculation is reasonable, beautiful shape, simple sense performance is strong, forging manufacture and so on production technology, professional integral forging.

Ordinary lathe finish turning, processing method: high precision CNC lathe turning. Argon arc welding processing sch10s, nominal pressure sch5s. Sch20s, sch30s, sch40, etc

American standard manufacturing standard: gb, Russia standard, Japanese standard, etc

Material: 304.316.316 l. 0 cr18ni9 321.202 purposes: widely used in water conservancy. Power stations, pipe fittings, industry, pressure containers, etc

Acid and alkali resistant, long service life and so on, the price reasonable calculation

Bolt connection mode of connection: flange nut.

Product process standards and quality control: feed, physical and chemical - blanking - hot forging forming, heat treatment, test - gold processing - waste inspection, identification, waste inspection - logo - packing type - ship.

ASTM A 249/A 249M Specification for Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser tubes

ASTM A269/A269M, ASME SA269/SA269M Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service

ASTM A 270 Specification for Seamless and Welded Austenitic and Ferritic/Austenitic Stainless Steel Sanitary Tubing

ASTM A312/A312M, ASME SA312/SA312M Specification for Seamless and Welded Austenitic Stainless Steel Pipes

ASTM A 358/A 358M Specification for Electric-Fusion-Welded Austenitic Chromium-Nickel Alloy Steel Pipe for High-Temperature Service

ASTM A409/SA409 Welded Large Diameter Austenitic Steel Pipe for Corrosive or High Temperature Service


ASTM B516, ASME SB516,

ASTM A 554 Specification for Welded Stainless Steel Mechanical Tubing

ASTM A632 Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing (Small-Diameter) for General Service

ASTM A 688 / SA 688 For Welded feed water heater ‘U’ Tubes

ASTM A731 / A731M Seamless and Welded Ferritic and Martensitic Stainless Steel Pipe

ASTM A 778 Specification for Welded, Unannealed Austenitic Stainless Steel Tubular Products

ASTM A789/A789M, ASME SA789/SA789M Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service

ASTM A790/A790M, ASME SA790/SA790M Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe


ASTM A 450/A 450M Specificaion for General Requirements for Carbon, Ferritic Alloy, and Austenitic Alloy Steel Tubes

ASTM A530/A530M Standard Specification for General Requirements for Specialized Carbon and Alloy Steel Pipe

ASTM A 999/A 999M Specification for General Requirements for alloy and Stainles Steel Pipe

ASTM A813/A813M Standard Specification for Single- or Double-Welded Austenitic Stainless Steel Pipe

ASTM A814/A814M Standard Specification for Cold-Worked Welded Austenitic Stainless Steel Pipe

ASTM A999/A999M Standard Specification for General Requirements for Alloy and Stainless Steel Pipe

ASTM A1016/A1016M Standard Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless Steel Tubes



DIN 2463-1Welded austenitic stainless steel tubes: dimensions and masses per unit length

DIN 17455 Welded circular stainless steel tubes with general quality requirements -Technical delivery conditions

DIN 17457 Welded circular austenitic stainless steel tubes subject to special requirements


EN Standards

EN 10216-5 Welded Stainless Steel Tube

EN 10217-7 Welded steel tubes for pressure purposes - Technical delivery conditions - Part 7: Stainless steel tubes

EN 10296-2 Welded circular steel tubes for mechanical and general engineering purposes - Technical delivery conditions - Part 2: Stainless steel


Australian Standards

AS 1528 Tubes (Stainless Steel) and Tube Fittings for the Food Industry.



JIS G 3447 Stainless Steel Sanitary Pipes

G 3448 Light Gauge Stainless Steel Tubes for Ordinary Piping

G 3459 Stainless Steel Pipes

G 3468 Large Diameter Welded Stainless Steel Pipes

G 3463 Stainless Steel Boiler and Heat Exchanger Tubes

G 3446 Stainless Steel Pipes for Machine and Structural Purposes