The table after hot galvanizing is bright and beautiful. The galvanized square tube pure zinc layer is a hot dip galvanized galvanized layer. Its performance is close to that of pure zinc and it is ductile, so it is rich in flexible hot dip galvanized angle steel and hot dip galvanized square tube. Galvanized pipes, these pipes are now mainly used for engineering construction. More use of electricity construction, transportation equipment, gas and heating construction. Therefore, there must be strict consumption technical requirements, and all technical requirements are required. Technical requirements for galvanized pipes 1. Grades and galvanized pipes are used for the steel grade and chemical composition of galvanized steel pipe. 2. Manufacturing Method The manufacturing method of the black tube is selected by the manufacturer. Galvanizing by hot dip galvanizing. 3, thread and pipe joint 3.1 galvanized steel pipe is threaded, the thread should be made after galvanizing. 4. Mechanical properties The mechanical properties of the steel pipe before galvanizing shall comply with the regulations. 5, galvanized layer galvanized steel pipe for galvanized layer test. The steel pipe sample shall not turn red in the copper sulfate solution. 6. Cold bending test The galvanized steel pipe with a nominal diameter of not more than 50 mm is used for the cold bending test. There was no filler in the experiment and the outside or upper part of the weld was located. After the experiment, there should be no cracking or peeling on the sample. 7. The hydrostatic test shall stop the hydrostatic test in the black tube or use the eddy current test pressure test.
The experimental pressure or eddy current should be in accordance with the rules for the sample size. The mechanical properties of steel are an important means of ensuring steel, depending on the chemical composition of the steel and the heat treatment system. In the steel pipe specifications, tensile properties as well as hardness and toughness indicators, as well as high temperature and low temperature properties required by users, are also defined according to different application requirements. 1 Tensile strength The tensile strength of the sample during the stretching process, the maximum force received during the fracture process, the stress obtained from the original cross-sectional area of the sample, called the tensile strength, which means that the metal data can resist the tensile force. The greatest talent. The calculation formula is: metal data with yielding phenomenon. When the force does not increase during the stretching process, the stress of the sample can continue to extend, which is called the yield point. If the force hits the ground, the upper and lower yield points should be determined. Upper yield point: The maximum stress before and under the initial drop of the specimen; the minimum stress at the yield stage when calculating the initial transient effect.
|Product Name||Carbon Steel Welded Pipe/Erw Steel Pipe|
|Standard||ASTM A53, ASTM A795, BS 1387,DIN2440|
|Material||Grade A & B|
|Surface Treatment||Bare/Black painting/Pre-galvanized/Hot-dipped Galvanized/Epoxy Powder Coating/ 3PE|
|End Treatment||Plain End/Bevelled End/Grooved End with Plastic Caps, etc|
|Packaging|| ≤323.9mm: In hexagonal seaworthy bundles with steel strips and PVC cover sheets|
≥355.6mm: piece by piece
|Delivery Time||According to the order quantity (In general: 30-40 days)|
|Shipment||By bulk/20'/40' container|
|Port of Shipment||Tianjin Xingang, China|
|Payment Terms|| 1. T/T: 30% T/T advance, 70% balance upon the copy of original B/L|
2. L/C: 100% at sight
3. D/P or CAD
|Application range||Oil and structural in low pressure liquid and gassy transportation,building and bridge and bridge fields.|
|Others|| 1. Zinc coating thickness for hot dipped galvanized: 200g-550g/m2|
2. Zinc coating thickness for pre-galvanized: 30-275g/m2
3. all the production process are made under the ISO9001-2000 strictly
pre-painted a53 galvanized steel pipepre-painted a53 galvanized steel pipepre-painted a53 galvanized steel pipepre-painted a53 galvanized steel pipe
Cangzhou Steel Pipe Group (CSPG)Co.,Ltd.
No.92 JieFang East Road ,Cangzhou City, Hebei,P.R.China.
CSPG has more than eighteen years history company which located in Lecong Iron and Steel World, a well-known steel distribution center in China, with superior geographical position and convenient water and land transportation.
We are a direct-selling manufacturer specializing in the research and development of spiral steel pipes, steel spiral pipes, anti-corrosion steel pipes inside and outside. Since its inception, the company has been guided by a brand-new thinking of steel pipe product market based on the business philosophy of honesty, pragmatism and knowledge-seeking.