DURLMARK – BLOG

Manufacturing Process of Reducing Flange Mold

By Durlmark Industrial | Jul 21,2017

The manufacturing process of reducing flange is: clamping, feeding, plasticizing, injection molding, opening mold, outing the products and so on.

Technical Requirements for Valves during Purchasing

By Durlmark Industrial | Jul 21,2017

The practice that definite specification, categories and working pressure meeting the requirements is imperfect in the current environment of market economy. For competition

Passivation Treatment of Stainless Steel

By Durlmark Industrial | Jul 20,2017

Stainless steel pipe and other products will undergo forming, welding and heat treatment in the manufacturing process, which makes the surface contaminated. Therefore, the passivation treatment is an important and indispensable process.

Pipe Fittings Applications and Categories

By Durlmark Industrial | Jul 20,2017

In the piping system pipe fitting plays a role of changing direction, diameter or elevation and closing the tube.In petrochemical plant, pipe has various kinds with many shapes and complex system;

Several Key Points of Selecting Flange Gaskets

By Durlmark Industrial | Jul 20,2017

The selected flange gaskets should have the following important characteristics to ensure long-time effective sealing when applied in adverse conditions.

The Design of Trunnion Mounted Titanium Ball Valve

By Durlmark Industrial | Jul 20,2017

Titanium has already applied in chemical engineering, health care, salt manufacturing, chlor-alkali, aviation and other industries, for its good mechanical property and excellent corrosion resistance.

Hardness Test Methods of Stainless Steel Pipe

By Durlmark Industrial | Jul 19,2017

In general, hardness indicators of Brinell, Rockwell and Vickers hardness index are adopted to measure the hardness of steel.

Straight Tee Technology and Process

By Durlmark Industrial | Jul 19,2017

Straight tee plays an important role in its application with beautiful shape, smooth surface, acid and alkali resistance,

How to Detect Pits on Flange Surface

By Durlmark Industrial | Jul 19,2017

There are two common methods for detecting pits on flange surface, including magnetic flux leakage and ultrasonic wave.

Materials Used for Liner of Valves

By Durlmark Industrial | Jul 19,2017

The followings are the materials used for liner of valves for corrosion resistance.