What is a seamless steel pipe? A steel pipe made of a single piece of metal with no seams on its surface is called a seamless steel pipe.According to the production method,the seamless pipe is divided into hot rolled pipe,cold rolled pipe,cold drawn pipe,e ...

What is hot galvanized and cold galvanized? Hot-dip galvanized is a method in which steel components are immersed in molten zinc to obtain a metal coating.The workpiece is degreased,pickled,dipped,dried and immersed in molten zinc. Cold galvanized 90 degre ...

Hot rolling and cold rolling are the forming processes of section steel or steel plate, which have great influence on the structure and properties of steel.Cold rolling is done below the recrystallization temperature,while hot rolling is done above the rec ...

Butt welding and socket welding are forms of welding connection between flange and pipeline.Socket welding usually inserts pipeline into flange for welding.Butt welding is a butt welding flange.Pipeline and butt joint are welded.Therefore,butt welding flan ...

Steel pipe has been widely applied in fluids transporting systems,oil and gas industries,thermal and high pressure services. As pipe emphasize the function of transporting media which under pressure to another place,so pipe always connect with various fitt ...

As we know,steel pipe and steel plate mechanical performances depends on two aspects:One is the heat treatment type;Another one also the most important factor is the chemical elements effect to these steel material. Common chemical elements in steel is C,M ...

Channel steel is a section of the groove shape of the long strip of steel,belongs to the construction and mechanical carbon structural steel,is a complex section of the steel,its cross-sectional shape for the groove shape.Channel steel is mainly used in bu ...

Today,Hebei Haihao Group will give you a detailed description of some knowledge about the air tightness testing methods of ductile iron pipes. The traditional methods for detecting leakage of ductile iron pipes are bubble method and smearing method.The air ...

Small diameter  seamless steel pipe can also be divided into:seamless small-caliber steel pipe and straight seam(also known as welding) small-caliber seamless steel pipe,generally in the pipe diameter below 89mm,more than 4 mm,can be collectively referred ...

Pipe has been widely applied in fluids transporting systems,oil and gas industries,thermal and high pressure services. A106 steel pipes As pipe emphasize the function of transporting media which under pressure to another place,so pipe always connect with v ...

The South African client’s order has been completed today and is being prepared for shipment.The piping products are used for the construction of a large petrochemical plant project in South Africe,which including a large number of flanges and pipe f ...

Seam welding is a welding technique in which two similar or dissimilar metals are connected by electric current and a nugget formation is formed in the process.Mostly,these nuggets are formed in the form of butt or the overlapping welding components.Seam w ...

Circumferential weld also called girth weld,is the welding of all kinds of circular and circumferential welds, and the weld formed by welding is a closed circumferential weld. DN1050 large diameter custom bend with seam welding and girth welding The girth ...

A hydrostatic test is a way in which pressure vessels such as pipelines,plumbing, gas cylinders,boilers and fuel tanks can be tested for strength and leaks.The test involves filling the vessel or pipe system with a liquid,usually water,which may be dyed to ...

What is radiographic testing(RT)? Radiographic testing(RT or X-ray or Gamma ray)is a non-destructive testing (NDT) method that involves the use of either x-rays or gamma rays to view the internal structure of a component.Radiographic testing is often used ...

Fluorophore penetrant inspection and pigmentation penetration inspection are both penetration testing(PT).They all include basic steps:surface preparation,apply penetrant,remove penetrant,application of developer,inspection and clean surface,but they are n ...

What is dye penetrant inspection? Dye penetrant inspection(DPI) is one of the non-destructive testing,also known as liquid penetrant inspection (LPI) or penetrant testing,is a cost-effective method used to locate surface breaking flaws such as cracks,poros ...

Magnetic particle inspection(MPI) or magnetic particle testing(MT) is a relatively simple test method that can be applied to ferromagnetic materials including finished articles,billets,hot rolled bars,castings and forgings.Magnetic particle testing require ...

Magnetic particle testing(MT) also referred to as magnetic particle inspection(MPI) is a non-destructive testing method that can detect surface and subsurface flaws in ferromagnetic materials.The method can detect surface or near-surface flaws such as crac ...

Ultrasonic testing is an nondestructive testing(NDT) technology for detecting test piece discontinuities which may not be visible to the human eye.These defects can include cracks,corrosion,inclusions,porosity outside of specified tolerances,and voids.Ultr ...