Bare surface,varnish painting,galvanizing,other painting as per customers' request
In bundles with steel strip or in loose, non-woven fabrics packings or as per customers' request
Civil engineering, architecture, steel towers, shipyard, scaffoldings, struts, piles for suppression of landslide and other structures
Good Quality Makes Us Different!
* Allgalvanized seamless pipeproducts are produced by ISO9001 certified mill ! * All galvanized seamless pipeproducts are EN10204:2004 3.1 Certified ! * Non-destructive Testing Report are available if required ! * Heat Treatment Report are available if required ! * Mechanical Testing Report are available if required !
Process of Galvanized Seamless Pipe
The production process of general galvanized seamless pipe can be divided into two types: cold drawing and hot rolling.Hot-rolled round pipe billet → heating → perforation → three-roll diagonal rolling, continuous rolling or extrusion → stripping → sizing (or reducing) → cooling → straightening → hydraulic test (or flaw detection) → marking → storage precision The tube is made of steel ingots or solid tube blanks through perforation to make capillary tubes, and then made by hot rolling, cold rolling or cold drawing. The specifications of precision tubes are expressed in millimeters of outer diameter * wall thickness. galvanized seamless pipe are divided into hot rolled and cold rolled (dial) galvanized seamless pipe.
Hot-rolled galvanized seamless pipe are divided into general steel pipes, low and medium pressure boiler steel pipes, high pressure boiler steel pipes, alloy steel pipes, stainless steel pipes, petroleum cracking pipes, geological steel pipes and other steel pipes. Cold rolled (dial) precision tubes include general steel pipes, low and medium pressure boiler steel pipes, high pressure boiler steel pipes, alloy steel pipes, stainless steel pipes, petroleum cracking pipes, and other steel pipes, as well as carbon thin-walled steel pipes, alloy thin-walled steel pipes, Rusty thin-walled steel pipes and special-shaped steel pipes. The outer diameter of hot-rolled seamless pipe is generally greater than 32mm, the wall thickness is 2.5-200mm, the diameter of cold-rolled precision pipe can reach 6mm, the wall thickness can reach 0.25mm, the outer diameter of thin-walled pipe can reach 5mm, and the wall thickness is less than 0.25mm. Higher precision than hot rolled dimensions.
How to inspect galvanized seamless pipe quality? 1. Elemental detection can follow analytical chemistry and chemical composition evaluation. Chemical composition analysis samples are divided into molten samples, metal ingots, drill cuttings, and pipe fittings. The molten samples are commonly analyzed through gadgets and equipment, and the finished product tube samples are analyzed by means of chemical composition analysis and single-piece evaluation.
2. Specification and form inspection. The inspection content consists of the thickness, diameter, length, refractive index, ellipticity, inclination of the hollow edge, blunt edge, cross-phase profile and so on.
3. Eddy present day flaw detection, magnetic particle flaw detection, magnetic flux leakage detection, infiltration flaw detection. Among them, the infiltration detection is confined to the flaw detection of the surface of the seamless steel pipe, and the magnetic particle detection, magnetic leakage detection and eddy modern detection are restricted to the detection of ferromagnetic raw materials. Eddy modern trying out is specially sensitive to point defects, while the other inspection techniques are in particular sensitive to cracks. 4. Organic chemical function test Physical property experiment, hydropower test and erosion test at ordinary temperature or a positive temperature. The main uses of seamless pipes are widespread. The widespread main motive seamless pipe is cold rolled by way of wellknown carbon metallic, low alloy steel or alloy device metallic, with the most important quantity of productions. The key is used to deliver the fluid mechanics pipelines or structural parts.
5. Performance take a look at includes deformation check, ring tension take a look at, bulge check, and bending take a look at.
6. Metallographic analysis consists of low output power and high strength detection.
packaging and shippment
Packaging Details about galvanized seamless pipe 1. Small OD: In hexagonal bundle with steel strips 2. Large OD: In bulk 3. Wrapped in waterproof plastic woven bag 4. Filled in wooden cases
5. Customized as clients requirement
Q1: Can I have a sample?Is it free? A: Yes,sample is offered for free, however freight shall be charged via customer. Q2: What about the lead time? A: Normally 7-10 running days for regular specification,2-5days if we've got in stock. Q3: Do you have got MOQ limit?A:It relies upon on products, generally we are able to do as consumer requires. Q4: What approximately your price term? A:T/T or L/C,Western Union, it may be negotiated. Q5: What is your warranty?A:Mill test certificate,SGS certificate, MTC certificate, delivery inspection or any thirs birthday party as you need.