DURLMARK – BLOG

Differences between Flat Weld Flange and Butt Weld Flange

By Durlmark Industrial | Jul 26,2017

Because of high production efficiency, easy operation and reasonable price, flat weld flange and butt weld flange are most common weld flanges.

Specified Bellow Globe Valves Used for Chlorine

By Durlmark Industrial | Jul 26,2017

In petroleum, chemical engineering, pharmacy, fertilizer, power and other industries, chlorine is usually used as oxidizing agent for its excellent oxidability.

New Development of Anti-Corrosion Material for Pipes

By Durlmark Industrial | Jul 25,2017

Currently, the worldwide manufactures are attach great importance to study and research of anti-corrosion to pipes, and many new materials and technologies are emerging.

Application of Welded Pipe

By Durlmark Industrial | Jul 25,2017

Where can welded steel pipe and pipe bend be used? Here are some of them:

Production and Processing of Flat Weld Flange

By Durlmark Industrial | Jul 25,2017

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.

Problems of Stainless Steel Butterfly Valve

By Durlmark Industrial | Jul 25,2017

At present, as a kind of component to cut off or control flow rate in pipeline system, stainless steel butterfly valve has been widely applied in petroleum, chemical industry,

Distortion Control When Quenching the OCTG Pipes

By Durlmark Industrial | Jul 24,2017

There are several methods of quenching the OCTG pipes, dipping, axial injection, laminar jet and laminar jet combined with axial injection.

The Identification of Fake Thick-Walled Seamless Steel Pipe

By Durlmark Industrial | Jul 24,2017

Here Durlmark Pipe Fitting offers six tips for the identification method of fake thick-walled seamless pipe.

Measurement Methods of Carbon Steel Flanges

By Durlmark Industrial | Jul 24,2017

With the rapid development of long-distance pipeline construction at home and abroad, pipeline pressure test has become indispensable and important.

Classification of Safety Valves

By Durlmark Industrial | Jul 24,2017

Structure of safety valves mainly has two types: spring type and lever type.Spring type safety valves refer to that the sealing between disc and seat is depending on force of spring.