Home > News > Industry news > Flat face flange connection valves
News
company news
Exhibition news
Industry news
Certifications
Contact Us
Cowinns Industry Equipment Co.,Ltd
No.127 Room No.748 Changjiang Road,High-Tech District,
Suzhou City, Jiangsu Province, zip:215128 China
Tel:+86 512 6878 1993 
Fax:+86 512 6818 4193
Mob&what's app:+86 153 0620 9257 
Email:info@cowinns.com
www.cowinns.com
Contact Now
News

The difference between DBB, DIB-1, DIB-2

Two types of seat sealing structures commonto trunnion mounted ball valves. 1. Double block and bleed valve A valve with two valve seat sealing pairsc...

Introduction to PID Diagram Knowledge of Valve Industry

Introductionto PID Diagram Knowledgeof Valve Industry PID diagram is thetechnical core of factory production. Whether it is an engineer from a designi...

Gaskets Are Not Created Equal

Gaskets are near the bottom of the food chain of valve components; trim, body materials and packing seem to get a lot more press. But gaskets serve an...

True Meaning of Double Block and Bleed

It’s time to do maintenance ona section of process. You don't want to shut down the entire facility, so youdecide to block off and depressurize just ...

Why PTFE-Lined valves should be cossetted

“Every day is a learning opportunity”, is a saying which is often heard here in the Valve World editorial department. After all, the valve industry is so diverse, and the number of applications so huge, that no-one (and certainly not a humble editor!) can possibly hope to know everything.

LNG: Significant opportunities for cryogenic valves

Quenching the world’s thirst for energy while mitigating climate change and air pollution is one of the greatest challenges of the 21st century. Natu...

VELAN VTP-2000 Ball Valve

A high performance ball valve with an affordable price Velan Inc., a leading manufacturer of high quality industrial valves for a broad range of indus...

Valve maintenance on its way to the cloud

Edited by Constanze Schmitz, Analyst ARC Advisory Group Europe ___ In the process industries, one of the most important, yet often over-looked assets,...

China (Shanghai) International Fluid Machinery Exhibition (2)

China (Shanghai)International Fluid Machinery Exhibition (2) The China(Shanghai) International Fluid Machinery Exhibition is one of the mostsignifican...

18''RF WCB Butterfly valve

Customized top connection dimensions 18'' RF WCB butterfly valve  supplied to power plant service for high temperature steam pipeline 

News

Flat face flange connection valves

Cowinns Cowinns 2020-08-05 19:08:55
Flat face flange connection valves

Valve connection ends have various forms. Flat face connection is one of the commonly used connection forms. The connection code is FF. Since the entire connection surface after processing is flat face, it is easy to process and is one of the commonly used connection methods for low-pressure valves. For high pressure butterfly valves can be design with RF flange end in Cowinns company. Here we just share some knowledge for FF flange end.

FF lange 01.jpg

Flange standards are GB/T 9113 , HG/T

20592 , GB/T 17241.6 , ASME B16.1 take the form of integral flange as an example. Different flange standards stipulate that the applicable pressure of flat face flange connection is slightly different, such as GB/T 9113-2010 whole steel in common flange Pipe flange and HG/T20592-

2009ф stipulates that the whole plane type iRPN 6 , PN 10 , PN16 .

FF flange 02.jpg

And GB/T 17241.6-2008 integral cast iron flange and JB/T 79-

2015 integral steel pipe flanges stipulate that the applicable nominal pressure is PN2.5 , PN6 , PN10 , PN16 , PN25 , and the maximum pressure can reach PN 40 , of which GB/T 17241.6-2008 also includes Class 150 and Class 300 , American standard cast iron The pressure commonly used in valve common flat face flange connection standard ASME B6.1 is Class

125.

FF flange 03.jpg

Since the flat face flange seal is a large plane, the contact area of ​​the gasket and the two flanges is wide when the gasket is connected to the two flanges. After the full plane is installed, the sealing surface of the sealing surface has a lower specific pressure, so the applicable nominal pressure range is narrow, PN 2.5 , PN 10 , the PN 16 is the most used applications more.

Flat face flange gate valve.jpgFlat face flange gate valve installation.webp.jpg

Flat face flange end gate valve and installation type