Chinese Professional Seamless Carbon Steel Pipe - EN10210 Galvanized Steel Pipe – JINBAICHENG

Product naming

Origin: .china
Brand Name: LCHW
Application: Fluid Pipe
Whether alloy: non-alloy
Section shape: round
Special tube: API tube, others
Outer diameter: 48mm
Thickness: 1-80mm
Standard: ASTM
Length: 12M, 6m, 6.4M, 3-12m
Certificate: API, GS
Grade: A106, A53-A369
Surface treatment: galvanized

Tolerance: ±1%, ±10%
Processing services: bending, welding, uncoiling, punching, cutting
Oiled or unoiled: non-oiled
Invoice: According to actual weight
Delivery time: 8-14 days
Product name: greenhouse steel structure
Surface treatment: black painted steel pipe
Material: Q195/Q235/Q345 Steel tube shape: round oval square rectangle
Packing: standard packing
Technology: Hot Rolling
Authentication: API
Use: structure

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Production steps

The process flow is: black tube-alkaline washing-water washing-pickling-water rinsing-soaking aid-drying-hot dip galvanizing-external blowing-internal blowing-air cooling-water cooling -Passivation-water rinsing-inspection-weighing-storage.

skills requirement

1. Brand and chemical composition
The grade and chemical composition of the steel for galvanized steel pipes should comply with the grade and chemical composition of the steel for black pipes as specified in GB/T3091.

2. Manufacturing method
The manufacturing method of the black pipe (furnace welding or electric welding) is selected by the manufacturer. Hot-dip galvanizing is used for galvanizing.

3. Thread and pipe joints
(A) For galvanized steel pipes delivered with threads, the threads should be machined after galvanizing. The thread should comply with YB 822 regulations.
(B) Steel pipe joints should comply with YB 238; malleable cast iron pipe joints should comply with YB 230.

4. Mechanical properties The mechanical properties of steel pipes before galvanizing should meet the requirements of GB 3091.

5. The uniformity of the galvanized layer Galvanized steel pipe should be tested for the uniformity of the galvanized layer. The steel pipe sample shall not turn red (copper-plated color) after being immersed in copper sulfate solution for 5 consecutive times.

6. Cold bend test The galvanized steel pipe with a nominal diameter of not more than 50mm should be subjected to a cold bend test. The bending angle is 90°, and the bending radius is 8 times the outer diameter. There is no filler during the test, and the weld of the sample should be placed on the outside or upper part of the bending direction. After the test, there should be no cracks and peeling of the zinc layer on the sample.

7. Water pressure test The water pressure test should be carried out in the clarinet. Eddy current flaw detection can also be used instead of the water pressure test. The test pressure or the size of the comparison sample for eddy current testing shall meet the requirements of GB 3092. The mechanical properties of steel is an important index to ensure the final use performance (mechanical properties) of the steel.

Product advantages

Hot-dip galvanized steel pipes are widely used in manufacturing industries such as construction, machinery, coal mines, chemicals, electric power, railway vehicles, automobile industry, highways, bridges, containers, sports facilities, agricultural machinery, petroleum machinery, prospecting machinery, greenhouse construction and other manufacturing industries.

Galvanized steel pipes are welded steel pipes with hot-dip galvanized or electro-galvanized layers on the surface. Galvanizing can increase the corrosion resistance of the steel pipe and prolong its service life. Galvanized pipe has a wide range of uses. In addition to line pipes for conveying water, gas, oil and other general low-pressure fluids, it is also used as oil well pipes and oil pipes in the petroleum industry, especially offshore oilfields, as well as oil heaters and condensate for chemical coking equipment. Pipes for coolers, coal-distilled wash oil exchangers, pipe piles for trestle bridges, pipes for support frames of mine tunnels, etc.

Specification