Q195, Q215, Q235 SPCC SS400 SPHC 0.5-7mm high quality high
precision bright small diameter welded pipe
Product Description
The influence of raw materials on the ERW steel pipes. The factors that affect the quality of raw materials are mainly the
three aspects of the unstable mechanical properties of the steel
strip, the surface defects of the steel strip and the large
deviations in geometric dimensions. Therefore, we should focus on these three aspects.
| product name | Welded pipe SPCC |
| standard | GB, JIS, DIN, ASTM, bs, GB 18248-2000, JIS G3463-2006 |
| Materi | SPCC DC01 ST12 |
| packing | 1.Wrapped in waterproof paper of steel pipe tube
2.Sackcloth with several steel strips of steel pipe tube
3.Cover cap of steelpipe tube
4. Wooden case of steel pipe tube |
| size | OD 3-300MM wall thickness: 1-30MM |
| suface | 1. PVC, black and paint 2. Transparent oil and rust-proof oil
3. According to customer requirements |
| MOQ | 1TONS |
| Trade | T/T, 100% L/C at sight, Cash, Western Union are all accepted if you
have other payment,please contact me |
1. The influence of the mechanical properties of steel strips on the
quality of steel pipes.
The common steel used for welded steel pipes is carbon. The main brands of structural steel are Q195, Q215, Q235 SPCC SS400
SPHC, etc. The high yield point and tensile strength of the steel strip will
make it difficult to form the steel strip, especially when the pipe
wall is thick, the material has a large rebound force, the steel
pipe has a large deformation stress during the welding process, and
the weld seam is prone to cracks. When the tensile strength of the steel strip is greater than 635
MPa and the elongation is less than 10%, the weld seam is liable to
crack during the welding process. When the tensile strength is lower than 30 MPa, the surface of the
steel strip is easily wrinkled due to the soft material during the
forming process. It can be seen that the mechanical properties of materials have a
great influence on the quality of steel pipes, and the quality of
steel pipes should be effectively controlled from the perspective
of material strength.
2. The influence of surface defects of steel plates on the quality of
steel pipes
Common surface defects of steel strips include sickle bending, wave
shape, longitudinal shear bite, etc. The sickle bending and wave shape usually appear during the rolling
of cold-rolled strip, which is caused by improper reduction
control. During the steel tube forming process, sickle-shaped bending and
wave deformation will cause the steel plate to deflect or overturn,
which may easily cause overlap welding of steel pipes and affect
the quality of steel pipes. Edge banding of steel strips usually occurs on longitudinal shear
bands, which are caused by blunt or sharp disc blades for
longitudinal shear. Due to the bite of the edges of the steel strip, this makes the
steel strip easy to crack and crack during the welding process, and
affects the stability of the welding quality.
3. When the width of the steel strip is less than the allowable
deviation, the influence of the geometrical dimensions of the steel
strip on the quality of the steel pipe reduces the extrusion
pressure during welding of the steel pipe, which makes the welding
of the steel pipe unstable, cracks or openings appear; When the tolerance is allowed, the extrusion pressure during the
welding of the steel pipe will increase, and sharp nozzles, welding
defects such as lap welding or burrs will appear at the welding
place of the steel pipe. Therefore, the fluctuation of the steel strip width not only
affects the accuracy of the outer diameter of the steel pipe, but
also seriously affects the surface quality of the steel pipe. Before welding, the surface quality and geometric dimensions of
each coil shall be checked. If the quality of the steel strip does not meet the standard
requirementsComputer Technology Articles, production shall not be
carried out to avoid unnecessary losses.
Detailed Photo:
packing details:
Application:
FAQ:
Q1: ARE YOU FACTORY OR TRADER?
A1: Wuxi Silaishi Special Steel Co.,Ltd is a manufacturer of steel
pipe and tube since 2010. We've gained our Export Right and become
an integrated company of industry and trade in order to satisfy
buyer's multi-request on different material and products.
Q2: WHICH MATERIAL/PRODUCTS YOU CAN PROVIDE?
A2: Seamless Stainless Steel Pipe / Tube, Seamless Carbon Stainless
Steel Pipe /Tube,Galvanized Steel Tube witn any Shape and Welded
pipes can also be available
Q3: HOW TO GET A SAMPLE?
A3: FREE samples are available for your checking and testing. And
to get free samples, you need to send us you detailed receiving
address (including post code) and your DHL/FedEx/UPS account for
collecting samples, courier cost will be paid in your side.
Q4. CAN YOU PRODUCE THE PRODUCTS ACCORDING TO MY OWN DRAWINGS?
A4: Yes, we can produce the products according to your drawings
that will be most satisfy you.
Q5: HOW TO VISIT YOUR FACTORY?
A5.Flights to Jinan are available from most major cities; You can take a plane to Jinan Yaoqiang Airport.
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