Welding Neck Flange JIS B2220 JIS B2238 5K 10K 20K 2"-12" 50A-300A

Name:Welding Neck Flange Standard:JIS B2220 JIS B2238 Material:Carbon Steel/ Stainless Steel Specifications:5K 10K 20K 2"-12" 50A-300A Connection mode:Welding Production method:Forged Acceptance: OEM/ODM, Trade, Wholesale, Regional Agency, Payment: T/T, L/C, PayPal Any inquiries we are happy to reply, please send your questions and orders. Stock Sample is Free & Available

Products Details

Data

Welding Neck Flange
Standard ANSI ANSI B16.5, ASME B16.47 series A/B
DIN Germany 6bar, 10bar, 16bar, 25bar, 40bar
GOST GOST 12820/12821/12836
EN1092-1 EN1092-01/05/11/12/13
JIS JIS B 2220-1984, KS B1503, JIS B 2216
BS4504 BS4504 BS10 Table D/E
Items Plate, Welding Neck, Slip on, Blind, Socket Welding, Lap joint, Threaded Flange etc.
Material ASTM A105 ST37.0 A350 LF2 A694 F60 A694 F70 SS304 SS321 SS316
Nominal Pressure class150 PN16 PN10
Applicable Medium oil,gas,water or other medium;
Technology Forge&CNC machining
Delivery Time 15-60 days
Payment Term FOB,CIF
Packaging Plywood cases

jis 5kjis 10k

jis 16kjis 20k

Product Introduction

The sealing surface forms of the neck butt welding flange include:
RF, FM, M, T, G, FF.
Advantage:
The connection is not easy to deform, the sealing effect is good, and it is widely used. It is suitable for pipelines with large fluctuations in temperature or pressure, high temperature, high pressure and low temperature, and also for pipelines transporting expensive media, flammable and explosive media, and toxic gases.
Disadvantages:
The neck butt-welding flange is bulky, bulky, expensive, and difficult to install and locate, so it is easier to bump during transportation.

There are two standard systems for the neck butt welding flange in China: one is the European system, and the other is the American system. The maximum pressure resistance of the neck butt-welding flange in the European system is 25Mpa, and the maximum pressure resistance in the American system is 42Mpa.

Butt-welding flange is also called high neck flange. It is different from flat welding flange in that there is a long and inclined high neck from the welding point of flange and pipe to the flange plate. The wall thickness of this section of high neck gradually transits to the pipe wall thickness along the height direction, which improves the discontinuity of stress and thus increases the flange strength.

Butt-welding flanges are mainly used in situations where the working conditions are relatively harsh, such as situations where the stress at the flange is large or the stress changes repeatedly due to the thermal expansion of the pipeline or other loads, pipelines with large fluctuations in pressure and temperature, or pipelines with high temperature, high pressure and low temperature below zero. Butt-welding flange is not easy to deform, has good sealing, and is widely used. The nominal pressure is PN1.0MPa~PN25.0MPa.

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