Stainless steels are widely used in many industries,there are five kinds of  stainless steel materials: Ferrite stainless steel, Austenitic stainless steel, Martensite stainless steel, Duplex stainles...

In the oil and gas transportation industry, several galvanized materials are specified to provide excellent corrosion resistance. There are three common methods of galvanizing: hot dip galvanizing, pr...

Their similarity: stainless steel 316,316L, 316H, 316Ti are molybdenum-based austenitic steel.
The differences between stainless steel 316, 316L, 316H, 316Ti:
(1) 316 stainless steel is austenitic chr...

Hebei Haihao Group has just completed a batch of orders for straight-seam carbon steel pipe fittings,including elbows, tees and large and small heads,ranging in size from DN65-DN800,of which most of t...

Do you know the effect of heat treatment after forging welding? As a professional forging manufacturer, today we will analyze the purpose of the heat treatment.
The purpose of heat treatment is to sof...

We know the heat treatment processes contain quenching, tempering, normalizing,here is the last step of the heat treatment process-annealing.
What is annealing?
Annealing is a metal heat treatment pro...

The previous article introduced the quenching and tempering of the heat treatment process.Today,we will introduce normalizing.
1.What is normalization?
Normalizing is a heat treatment that improves th...

The last article briefly introduced the quenching process,and today I will introduce another process of heat treatment-tempering.
1.What is tempering?
Tempering is a heat treatment process that heats ...

Heat treatment is one of the important processes in mechanical manufacturing. Compared with other processing processes, heat treatment generally does not change the shape and overall chemical composit...

We know the common defects of steel pipes contain external surface defects,internal surface defects,over and under size also can defect the steel pipes.
1.Uneven wall thickness
Features: The thickness...

We know the common external surface defects of steel pipes,today let’s learn the common internal surface defects of steel pipes.
1.Inward fold
Features: Straight or spiral, semi-helical serrated...

Steel pipes are widely used in many industries,if you know the cause of common external surface defects in steel pipes,you can avoid them.
1.Outward Fold
Features: A spiral layered fold on the outer s...

The quality inspection method of LSAW steel pipe is as follows:
1.Judging from the surface, that is, in appearance inspection. The appearance inspection of welded joints is a simple and widely used in...

As we all know LSAW steel pipes are widely used in many industries,do you know the production method of large diameter LSAW steel pipe?Now let me tell you about it.
Production process introduction of ...

1.Basic requirements for the appearance of LSAW welds
Before the non-destructive testing of LSAW steel pipes, the inspection of the weld appearance shall meet the requirements. The general requirement...

LSAW steel pipe (Longitudinally submerged arc welding steel pipe) in leaflets plate as raw material,the steel plate in the mold or molding machine pressure (volume) into using double-sided submerged a...

Factors impacting zinc plating results:
Sometimes the piping goods don’t get ideal effects after zinc plating.Actually there are a variety of factors that can influence the outcome of a zinc pla...

As steel material piping goods supplier,we often hear one word ‘rust’.There are two types rust for the zinc plating steel piping goods.
When most people use the term ‘rust’, th...