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Factors that Cause Flange Sealing Leakage in Refinery

Factors that Cause Flange Sealing Leakage in Refinery

  • Posted: 02/27/2016 05:02:03
  • Hits: 110

Flanges are the most common connection components between refinery equipment and pipes. Most materials in refinery are poisonous, flammable and corrosive, once the sealing of flange is invalidated, these dangerous materials will be leaked out and cause severe fire and injuries and deaths. There...


Requirements for Large-diameter Welded Flange

Requirements for Large-diameter Welded Flange

  • Posted: 01/02/2016 06:01:12
  • Hits: 252

First, the level and technical requirements of large-diameter welded flange should comply with the relevant requirements of JB4726-4728. 1. Grade Ⅰ forging is allowed to use in carbon steel forgings and austenitic stainless steel forgings with nominal pressure among 0.25PM to 1.0MPa. 2. Forg...


Cleaning Problems of Carbon Steel Flanges

Cleaning Problems of Carbon Steel Flanges

  • Posted: 12/07/2015 08:12:15
  • Hits: 156

1. Rinsing Pollution After quenching the fasteners, use silicate to clean and rinse them. If there were some solid matter on the surface, and found to be iron oxide and inorganic silicate by infrared spectroscopy, this was due to the incompletely rinse and silicate was remained on the fastener s...


How to Prolong the Service Life of Large Flange

How to Prolong the Service Life of Large Flange

  • Posted: 11/25/2015 06:11:13
  • Hits: 167

There are many factors for the service life of large flange. Due to the high viscosity of the flange material and poor chip breaking performance, it is easy to have problems in the tapping process, affecting its processing efficiency and thread quality. Such as: chip scratches workpiece thread or ...


Differences between Flat Weld Flange and Butt Weld Flange

Differences between Flat Weld Flange and Butt Weld Flange

  • Posted: 11/19/2015 09:11:18
  • Hits: 221

Because of high production efficiency, easy operation and reasonable price, flat weld flange and butt weld flange are most common weld flanges. In most cases, people will choose these two kinds of flanges. But how to distinguish them and what is the difference?   First, different material...


Production and Processing of Flat Weld Flange

Production and Processing of Flat Weld Flange

  • Posted: 10/26/2015 08:10:46
  • Hits: 200

Flat welded flange has certain technical requirements and parameters in its production and usage, so it must be manufactured in accordance with certain production and processing methods.   1 Flat welding flange should be cut into strips along the steel rolling direction, and then bended a...


Measurement Methods of Carbon Steel Flanges

Measurement Methods of Carbon Steel Flanges

  • Posted: 10/08/2015 08:10:00
  • Hits: 199

With the rapid development of long-distance pipeline construction at home and abroad, pipeline pressure test has become indispensable and important. Before and after the pressure test, cleaning must be done on each pipelines, usually the number is 4 to 5 times. Especially after the pressure test, ...


Some Knowledge Points of Slip On Flanges

Some Knowledge Points of Slip On Flanges

  • Posted: 09/09/2015 08:09:45
  • Hits: 317

Slip on flanges are the most common flanges in China and they can be classified into three types according to the sealing surface: flat faced slip on flanges, concave convex surface slip on flanges and mortise grooved slip on flanges. And the first type, with the largest application, is often used...


Classification and Feature of Flange

Classification and Feature of Flange

  • Posted: 08/14/2015 07:08:44
  • Hits: 314

Classification of flange 1. By materials: carbon steel flange, cast steel flange, alloy steel flange, stainless steel flange, copper flange, aluminum flange, plastic flange, PPC flange and so on. 2. By manufacturing method: push flange, pressed flange, forged flange, casting flange and so on. ...