The Purge The purge refers to the process that the air purge or the steam purge are often used to clean the pipe based on the service condition of the working medium and how dirty the inner surface of the pipe is after the process pipeline system is installed. The general requirements of the pipe purging are as the following....

What are the advantages of cold working processes compared with hot rolled processes? (1) Cold working processes can be adopted to produce thin wall pipes,extremely thin wall pipes and large diameter thin-wall pipes, small diameter pipes, capillary pipes, and all kinds of special-shaped and variable section pipes or pipe...

Ductile iron pipes mainly consist of carbon, silicon, manganese, sulfur, phosphorus and magnesium. Applications Cast iron pipes with flexible joints are gravity type effluent discharge pipes, which are widely used for drainage of high-rise buildings' sewage and rain. Materials Ductile iron pipes...

The square steel pipe is a term for square pipes which have the equal side length and rectangular pipes which have the unequal side length. The square steel pipe is made by the strip steel with the rolling process. Generally, the strip steel will be unpacked, flattened, curled and welded to be a round pipe, be rolled into...

The high pressure boiler pipe is a kind of boiler pipe and belongs to the seamless steel pipe, which is mainly used for manufacturing the superheater tube, the reheater tube, the gas-guide tube and the main steam pipe for high pressure and superhigh pressure boilers. Manufacturing processes of high pressure boiler pipes...

Regulations before the hydraulic pressure test of pipelines 1. Pipelines for pressure test must be tested after completed backfill. 2. For special requirements, some specific pipelines can leave pipe joints not to be backfilled, but the pipe body needs to be fully backfilled to a certain height to avoid displacement...

Installation points of T-pipe 1. Clean debris within the groove of the T-type female end surface with wire brushes, 25mm putty grafters, brushes and rags. Check the chamfer angle of the other pipe socket, and keep the socket as well as the rubber ring clean. 2. Place the rubber ring into the groove of the female end. For...

Definition of cold galvanizing Cold galvanizing is also known as electrogalvanizing, and this kind of zinc-plated method is used for protecting metals from being corroded. We apply zinc fillers paint to the protective surfaces by any coating method, and the paint will form zinc layers after it dries, which contain up to...

We use strip steels or steel plates as billets, bend them into tube shells with different methods, and then weld them with different ways so as to obtain welded pipes with sealed cross sections formed by a certain strength welding seams. There is a wide range of materials for producing welded pipes, including carbon steels,...

Ductile Cast Iron Pipes are mainly used for transporting tap water and are the ideal choices for tap water pipes. Mechanical Properties Minimum tensile strength: 420/Mpa; minimum yield strength: 300/Mpa; minimum elongation: 7% . GB / T13295-2008 ISO2531-2009 Diameter: DN80-DN2600 Advantages When ductile iron pipes are...