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Hollow Carbon Rectangular And Square Steel Pipes

Posted on 2019/05/14
Hollow Carbon Rectangular And Square Steel Pipe

Product Description

What is black square&rectangular steel pipe?
Welding pipes is one of the simplest and most durable ways to join piping together and steel pipes can simply be welded together with MIG (metal inert gas), TIG (tungsten inert gas or SMAW (stick metal arc) welding. Before welding two pipes together, avoid any gaps between the two pipes. While welding, take measures to ensure the continual alignment of the two pipes.

What is pre galvanized square&rectangular steel pipe?
The pre-galvanized welded steel piperefers to welded tube which undergo degreasing,rush removal,phosphorization,zand drying processes before galvanization.The treatments before galvanization allow the product to be conveniently plated with a zinc coating,and also ensure uniform coating thickness,strong coating adhesion,and improved corrosion resistance.

What is hot dipped galvanized square&rectangular steel pipe?
Hot-dip galvanizing (HDG), as referenced is the process of dipping fabricated steel into a kettle or vat of molten zinc. While the steel is in the kettle, the iron metallurgically reacts with the molten zinc to form a tightly-bonded alloy coating that provides superior corrosion protection to the steel.

Specifiction list

OD mm WT mm OD mm WT mm OD mm WT mm OD mm WT mm
15x15 0.5-2.0 28x28 0.5-3.0 75x75 1.0-5.0 160x160 2.5-12
16x16 0.5-2.0 30x30 0.5-3.25 80x80 1.0-5.0 180x180 2.5-12
18x18 0.5-2.0 35x35 0.5-3.5 90x90 1.0-6.0 200x200 2.5-12
19x19 0.5-2.0 40x40 0.8-3.75 100x100 1.0-6.0 300x300 2.5-12
20x20 0.5-3.0 50x50 0.8-3.75 120x120 2.5-12 400x400 2.5-12
24x24 0.5-3.0 60x60 1.0-4.0 140x140 2.5-12 500x500 2.5-12
25x25 0.5-3.0 70x70 1.0-5.0 150x150 2.5-12 600x600 2.5-12

Material list

Elements Chemical Composition% Mechanical Property
Material C% Mn% S% P% Si% Yield Point Tensile Strength Elongation
(Mpa) (Mpa) (%)
Q195 0.06-0.12 0.25-0.50 <0.05 <0.045 <0.3 >195 315-430 32-33
Q235 0.12-0.2 0.30-0.70 <0.045 <0.045 <0.3 >235 375-500 24-26
Q345 <0.20 1.0-1.6 <0.04 <0.04 <0.55 >345 470-630 21-22

Q: Can provide OEM/ODM service?
A: Yes. Please feel free to contact us for more details discuss.
Q: How is your Payment Term?
A:One is 30% deposit by TT before production and 70% balance against copy of B/L; the other is Irrevocable L/C 100% at sight.
Q: Can we visit your factory?
A: Warmly welcome. Once we have your schedule, we will arrange the professional sales team to follow up your case.
Q: Can you provide sample?
A: Yes, for regular sizes sample is free but buyer need to pay freight cost.
Q.Surface coating?
A:Antirusted painting, varnish painting, galvanized, 3LPE, 3PP,Zinc oxide yellow primer,Zinc phosphate primer and as per customers request.

how to contact us?


Cangzhou Datang Steel Pipe Co., Ltd All Right Resevered.