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 ...

Yesterday,a customer from England asked me that whether our factory produce stainless steel pipe elbow?The answer is obvious-yes,we produce stainless steel pipe elbows more than 30 years,the elbows can be 45°,90°,180° or as customized requirements.Why we c ...

The most basic difference between a pipe elbow and a bend is that the pipe bend is longer than the elbow at the same diameter.Pipte elbow is only the bend of a pipe,but pipe bend includes a straight pipe at both ends in addition to the bent part. Carbon st ...

Large-diameter pipe elbow generally refers to the elbow with a diameter above DN600,large-diameter pipe elbow includes bevel straight seam elbow and large-caliber seamless butt welding elbow. The automatic welding production of large-diameter pipe elbows i ...

A lap joint flange(also called loose flange) consist two parts,the backing flange and the stud end,the stub end will be butt welded to the pipe,and the lap joint flange will be slip around the stub end.The lap joint flange is not connected to the pipe and ...

Reducing flanges are a durable,corrosion resistant flange designed for the connection of two pipes with varying sizes.Whether you are attempting to connect a larger pipe to a smaller pipe or a small to large,reducing flanges are what you will need to get t ...

What is a socket welding flange? Socket welding flange are typically used on smaller sizes of high pressure pipes.These pipe flanges are attached by inserting the pipe into the socket end and applying fillet weld around the top.This allows for a smooth bor ...

Hebei Haihao Group is Chinese leading flanges,pipe fittings&steel pipes manufacturer with over 35 years experience.We will attend NEFTEGAZ 2019(the 19th International Exhibition for Equipment and Technologies for the Oil & Gas Industries). Haihao G ...

Haihao Group is one of the leading steel piping manufacturer in China. We are specialized in stainless steel flange, fittingsand pipe. A pipe bend looks like a elbow of different bending radius. The most regular pipe bends are 30 degree, 45 degree, 90 degr ...

Hebei Haihao steel pipes department provide the precision tubes to GPC Canada as mechanical parts.The inspector from GPC visited our factory to do the trial order inspection. GPC inspector check the dimensions of the precision tube in HAIHAO GPC (Genuine P ...

Because of the heavy fog and haze in north of China,government is controlling the industry production of Hebei province,China.Many piping products factories are limited and temporary shutdown by government.(The effect of haze on the steel industry in north ...

If you live in northern China,you have to put mask on,because it’s smoggy.The haze not only brings harm to the human body,but effect the steel industry in this area. Air pollution from steel pipe manufacture First,many steel companies and steel pipe ...

Hebei Haihao Group is busy producing in the 20 pieces tube sheets.This’s the second phase of the tube sheets order used in heat exchangers,these products will be installed in Australia.(Client Inspect Tube Sheets Quality and Production In Haihao Grou ...