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Credibility ,Butt welding flange, also known as high
neck flange or large tail flange, is a type of pipe fitting. It refers to a
flange with a neck and a transition of a round pipe and is welded to the pipe.
The butt welding flange is not easily deformed. It is well sealed and widely
used. It is suitable for pipelines with high pressure or temperature
fluctuations or high temperature, high pressure and low temperature pipelines.
The advantage is that the price is cheap, the nominal pressure does not exceed
2.5MPa; it is also used for transportation expensive, flammable and explosive.
On the pipeline of the medium, the nominal pressure is around PN16MPa.
Use an accurate installation sequence for
the welded flange:
A butt weld flange is a type of pipe and
refers to a flange with a neck that has a transition of a round pipe and is
butt welded to the pipe. The welding flange is not easy to be deformed, sealed,
and widely used. It is suitable for pipelines with high pressure or temperature
fluctuations or high temperature, high pressure and low temperature pipelines.
The strength is cheaper, the nominal pressure does not exceed 2.5MPa; also used
for conveying quotes. On the pipeline of expensive, flammable and explosive
medium, the nominal pressure is around PN16MPa.
There are two techniques for making welded
flanges:
Technical requirements for welding flanges:
The welding flange connection is easy to
use and can withstand relatively large pressures. For welded flanges, materials
are produced according to different grades of pressure. From low-pressure
asbestos pads, high-pressure asbestos pads to metal mats.
The welding flange is produced and produced
in different ways and processes in actual production and development. According
to the method and principle of the process, it can produce important value and
effect on different aspects, and add certain in actual production. The elements
that increase the characteristics and value of the carbon steel flanges,
perform well in terms of use characteristics and value.
In industrial piping, the use of butt
flange connections is very broad. In the home, the pipe diameter is small and
low pressure, and the connection to the weld flange is not visible. If you are
in a boiler room or production site, there are flanged pipes and equipment
products everywhere.
In the actual production process, the
welding flange adopts certain technical parameters and requirements for
production and application to ensure correct use and promotion according to
certain methods and principles. Colleagues use certain process methods and
principles for production and welding. To ensure the reliable quality of the
welded flange in use.
The product grade and technical
requirements for the butt weld flange are to comply with the relevant
requirements in JB4726-4728. Carbon steel or austenitic stainless steel
forgings with a nominal pressure of 0.25MP-1.0MPA are permitted, allowing them
to be manufactured with Class I forgings. Forgings with a nominal pressure
between 1.6MPA and 6.3MPA shall meet the requirements of Class II or Class II
forgings. For forgings for flanges with a nominal pressure of not less than
10.0MPA, chrome-molybdenum steel forgings with a nominal pressure of more than
4.0MPA, ferritic steel forgings with a nominal pressure of more than 1.6MPA and
an operating temperature not exceeding -20 degrees Celsius, such flat welding
Flange forgings must comply with the relevant requirements for Class III
forgings.
Normally, the butt weld flanges are
manufactured using forging or forging techniques. If it is to be made of steel
or steel, it must meet these requirements. The butt weld flange must be
subjected to ultrasonic flaw detection, and there should be no delamination
defects after inspection. It is to be cut into strips along the rolling
direction of the steel, and it is butt-welded into a ring shape by a bending
process, and at the same time, the surface of the steel is formed into a ring
cylinder surface, and it is not possible to machine the steel sheet material
into a neck. Butt welding flange. For the butt weld of the ring, it is
necessary to adopt the form of full penetration weld. The butt weld of the ring
must be heat treated after welding, and the test of 100% radiation or
ultrasonic flaw detection should be carried out, and the results of the
radiographic inspection should be consistent. For the Class II requirements in
JB4730, the results of ultrasonic flaw detection of the welded flange must meet
the Class I standard requirements of JB4730.
Source: China Stainless Steel Flanges Manufacturer - Yaang Pipe Industry Co., Limited (www.yaang.com)
Tel No:+86-18267732328 / Email:[email protected]
Address:Longwan District, Wenzhou, Zhejiang Province, China.
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Yaang Pipe Industry Co., Ltd. is an international supplier of piping solutions for flange, butt welding fittings, socket welding fittings and threaded fittings. Our products are widely used in different industrial fields, including oil and gas, chemical industry, petrochemical industry, power plant, pulp and paper industry, environmental and water conservancy engineering, engineering projects, etc.