Q215A Q215B Galvanized Pipe steel tube
Galvanized pipe, also known as galvanized steel pipe, is divided into hot-dip galvanized and electro-galvanized. The hot-dip galvanized layer is thick, the coating is uniform, the adhesion is strong, and the service life is long. The cost of electroplating is low, the surface is not smooth, and the corrosion resistance is worse than that of hot-dip galvanized pipe. Galvanized pipes include galvanized round pipes, galvanized square pipes, galvanized seamless pipes, galvanized welded pipes, etc.
Product Introduction
Ordinary galvanized steel pipes are seamed steel pipes. Galvanized steel pipes are only available on special request. The way to distinguish between seamed and seamless steel pipes is to measure the outer diameter of the pipe. The manufacturing standards of the two steel pipes are different, and the outer diameters are also different. For example, for a steel pipe with a diameter of 100mm, the outer diameter of the seamed one is 114mm, and that of the seamless one is 108mm.
Product Details
Product name | Galvanized steel pipe |
Type | Galvanized square tube, galvanized round tube, hot-dip galvanized steel pipe, electro-galvanized steel pipe, etc. |
Grade | Q215A; Q215B; Q235A; Q235B |
Wall thickness (mm) | 2.0, 2.5, 2.8, 3.2, 3.5, 3.8, 4.0, 4.5, etc.Can be customized according to customer needs. |
Standard | GB/T3091-2015; GB/T13793-2016; GB/T21835-2008 |
Length (mm) | Cut according to customer requirements |
Nominal inner diameter | DN15;DN20;DN25;DN32;DN40;DN50;DN65;DN80;DN100;DN125;DN150;DN200;DN300, etc. |
Zinc layer | According to customer requirements |
Export packaging | Standard export packaging, also can be packaged according to customer requirements. |
Requirements for galvanized steel pipe:
The outer and inner surfaces of the pipe must be smooth and free from cracks, fissures, material coverage, and non-metallic inclusions. Small scratches, bumps, dents, a thin layer of welding slag or traces are allowed after removing defects produced during production, and avoid wall thicknesses below the allowable minimum. The weld must be dense and continuous, without cracks or other defects that reduce the tensile strength of the weld under the tensile strength of the base metal. The outer boss of the weld is removed. Seams are allowed to be thickened within the permitted diameter limits. The burr inside the weld has not been removed. The edge of the metal strip in the weld is not allowed to have unevenness. The end of the pipe must be cut perpendicular to its axis. Burrs on the pipe ends due to cutting technology processes are allowed. Deformation of the pipe ends is not allowed.
Galvanized pipe must have an adherent, continuous layer of zinc on the inner and outer surfaces. Zinc coverage of both surfaces or only the inner surface is achieved by immersion in a bath of molten zinc. Local roughening and thickening of the zinc layer is allowed, mainly in the section 80 mm from the end of the pipe, where blowing of the pipe is performed. The thickness of the zinc layer on the outer surface must be thinner than that on the inner surface. The inner surface must be approximately 56 µm thick. The linear mass of a galvanized pipe is calculated by adding the mass corresponding to the minimum thickness of the zinc layer to the mass of the pipe.
Galvanized steel pipe production technical requirements：
1. Grade and chemical composition
The grade and chemical composition of steel for galvanized steel pipes shall comply with the grade and chemical composition of steel for clarinet pipes specified in GB/T3091.
2. Manufacturing method
The manufacturing method of the clarinet (furnace welding or electric welding) is selected by the manufacturer. Galvanizing adopts hot-dip galvanizing method.
3. Thread and pipe joint
(a) For galvanized steel pipes delivered with threads, the threads shall be machined after galvanizing. Thread should comply with the provisions of YB 822.
(b) Steel pipe joints shall comply with the provisions of YB 238; malleable iron pipe joints shall comply with the provisions of YB 230.
4. Mechanical properties The mechanical properties of steel pipes before galvanizing shall comply with the provisions of GB 3091.
5. Uniformity of galvanized layer Galvanized steel pipe should be tested for uniformity of galvanized layer. The steel pipe sample shall not turn red (copper-plated color) after being continuously dipped in the copper sulfate solution for 5 times.
6. Cold bending test The galvanized steel pipe with a nominal diameter not greater than 50mm should be subjected to a cold bending test. The bending angle is 90°, and the bending radius is 8 times the outer diameter. No filler is used 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 off of the zinc layer on the sample.
7. Hydrostatic test The hydrostatic test should be carried out on the clarinet, and the eddy current flaw detection can also be used instead of the hydrostatic test. Test pressure or eddy current testing comparison sample size should comply with the provisions of GB 3092. The mechanical properties of steel are important indicators to ensure the end-use performance (mechanical properties) of steel.
Custom Made
Various stainless steel structures, carbon steel structures, galvanized steel structures, and aluminum profiles can be produced.
Color-coated coils of various patterns and colors, aluminum profiles, elbows, tees, stainless steel flanges, steel mesh, perforated steel sheets, cold-formed steel sheet piles, hot-rolled steel sheet piles, U/Z/S/L/AS/H types Steel sheet piles, steel strands, prestressed steel strands, 7/2/3/19/37 steel strands, galvanized steel strands, plastic-coated steel strands, carbon steel wires, steel wires, steel bars, grade I steel bars ( 300/420 grade), Ⅱ grade reinforcement (335/455 grade), Ⅲ grade reinforcement (400/540), Ⅳ grade reinforcement (500/630), compression reinforcement, tension reinforcement, erection reinforcement, distribution reinforcement, stirrup Steel bars, deformed steel bars, smooth steel bars, ribbed steel bars, cold-rolled twisted steel bars, universal steel beams (H-beams), welded H-beams, hot-rolled H-beams, T-beams, T-beams for railways, special-shaped welded T-beams, special-shaped heat Rolled equal-sided and equal-thickness T-shaped steel, special-shaped bolted T-shaped steel, H-shaped steel split T-shaped steel, Z-shaped steel, C-shaped steel, channel steel, I-beam, steel beam (Universal Beam), angle steel (angle iron), equilateral angle steel , Unequal angle steel, W-shaped steel, etc.
Rich manufacturing experience, complete production line, support for customizing various steel profiles! Meet customer application needs. Welcome to contact us for customization.
FAQ
Q: About the price of the product
A: Due to the rise and fall of raw material prices, as well as factors such as the national power restriction policy, product prices will also fluctuate. Welcome to contact us to get the latest product price.
Q: Can you arrange shipment?
A: Of course, we have multiple warehouse locations as well as regular forwarders, and can get the best price from most shipping companies. Provide professional transportation services.
Q: How long will the delivery take?
A: Products that are in stock or only need simple processing, generally 5-15 days. If there is no stock, according to the required product quantity and the usual production time of this product, our professional sales staff will give you an approximate delivery time. According to past experience, in most cases, the delivery time will not exceed 45 days.
Q: What services do you provide?
A: 1. Provide samples, including conventional steel products and some customized steel structure products;
2. Support third-party product quality testing and provide various certificates
3. Provide pick-up and drop-off customer inspection service
4. Provide customized steel structure service
5. Provide simple steel processing, such as cutting, drilling, galvanizing, polishing and other services
6. Provide one-stop service, from product production to product transportation.
7. Provide 24 hours online service
Q: How can I get your quotation as soon as possible?
A: You can contact us through various contact channels on the website, such as: phone number, email, WhatsApp, WeChat, etc. We will reply within one day. When you contact us, you can provide us with the product specifications you need, such as size, quantity, material, drawings and other information. In this way, we will be able to provide you with the most accurate product quotation immediately.
