The difference between GB3087 and GB8163,include:size,shape,weight,technical requirements,test methods,inspection rules,packing,marks,quality certificates.Steel pipe by GB3087 is better than by GB8163...

API 5L line pipes can be divided into two grades:API 5L PSL1 and API 5L PSL2.PSL is short for Product Specification Levels.Both levels of API 5L line pipes contain seamless steel pipe and welded steel...

Detail of API 5L Steel Plate:
HEBEI HAIHAO GROUP could provide pipeline steel plate,which is widely used for making welded line pipe including ERW,LSAW,SSAW,etc.
Pipeline steel plate(API 5L Steel Plat...

There are various  pipe fittings manufacturing process that used to manufactured elbow, tee, reducers and other pipe fittings.
Fittings are manufactured from seamless pipe and from welded Pipe.Large d...

o Welded steel pipe is a seam steel pipe.Its production is to bend the tube blank (steel plate and steel strip) into a required cross-sectional shape and size by various forming methods, and then use ...

HEBEI HAIHAO GROUP got a order about Corten A steel pipe and fittings.This order passed  by BV marine witness and issued the certification.
What is Corten steel and how is it made?
Corten is a weather...

There are many varieties of steel tubes, and the steel grades (types) used are not the same. The chemical composition of the steel tubes of the same variety may also be different, but the steel tubes ...

Q235B spiral pipe is a commonly used raw material in spiral pipes.It is a spiral seam steel pipe welded with strip steel coil as the raw material and active double wire double-sided submerged arc weld...

In China,3PE anticorrosive steel pipes have been applied in oil and gas systems,nearly 4,000 kilometers of the national key project West-East Gas Pipeline have used 3PE anti-corrosion steel pipes. We ...

Germany customer placed an order to us recently, this order is complicated, it includes kinds of materials of flange,butt welding fittings, forged fittings. They ask BV 3.2 certification for this orde...

HEBEI HAIHAO GROUP is a well-known supplier and export of corten A steel EN 10025 S355JOWP  plate,pipe and fittings company.
Corten steel is also known as weathering steel. Corten steel is also referr...

Electrode electroslag resurfacing is the use of conductive slag resistance heat to melt the resurfacing material and base material. Electroslag resurfacing welding is one of the methods of resurfacing...

During our foreign trade service of steel water transmission piping,AWWA standard is apparently the most important standard.
AWWA means American Water Works Association which is an international, nonp...

Our recently order for seamless 24″ carbon steel tee , and one weld line 42″*24″ tee .The thickness is 59mm and the client required high quality .
Normally this kind of order is hard...

When you purchase from China ,will you choose trading company or factory?
Yesterday ,i talked with one of our customer,a 6 years purchase from Kazakhstan .let’s listen to what he say ….
“I...

In the previous article(Proper packing of piping goods save 20000USD),it shows us the importance of proper packing for piping goods. It is not only protection of goods or save money but also proof of ...

Weld Overlay (WOL), also known as cladding, hardfacing, weld cladding, or weld overlay cladding, is a process where one or more metals are joined together via welding to the surface of a base metal as...

Why are some tee fittings on the market rusty or even burry ,and some tee pipe fittings are bright and pollution-free?This is the sandblasting effect of tee pipe fittings.
Non sandblasted tees
Non san...