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Straight Seam Submerged Arc Welded Pipes Trends
Energy market context, especially long distance gas pipeline construction to promote the development of large LSAW pipes, the current market, domestic and foreign markets in the domestic demand for oil and gas pipelines from about 8 million T, the supply amount of year 1100 million t, the more in...Read more -
LSAW Pipe Welding Quality Control Measures
Large Diameter LSAW pipe wall thickness with its big, good material, process stability, becoming the first choice for large domestic and foreign oil and gas pipe project. In the large-straight seam submerged arc welded pipe welded joints, weld and heat affected zone is most likely to produce a va...Read more -
Difference of UOE and JCOE
The difference of UOE and JCOE caused by the difference production process of them. From the above two kinds of production process, the technical of them are nearly the same .The big difference is the molding method. UOE molding just made by two steps:U molding and O molding.JCOE molding made by ...Read more -
Common Surface Treatment of Stainless Steel Pipe Damage
Stainless steel pipe in the production process, will appear on the surface rust, welding spatter phenomenon will be welded stainless steel pipe surface will be more scratches, these cases should be how to do it? Torch as a professional production and sales of stainless steel pipe manufacturers fo...Read more -
Galvanized Steel Surface Removal Technology
1. The cold rolling step: The surface state of the strip there are two main aspects of surface roughness and residues. 2. Surface roughness: Cold-rolled strip surface roughness control process involving many factors, by batch annealing the strip, have a certain surface roughness to reduce the eff...Read more -
Galvanized Steel Surface Defect Inspection Points
We see more hot dip galvanized steel craft on the market now, hot dip galvanized steel surfaces because of improper operation of the formation of surface defects, the need for strict process to produce better products. If the defect is due to the hot-dip galvanizing equipment dysfunctional or poo...Read more -
Over-temperature Boiler Tubes Knowledge
Boiler tubes cooled in the heating surface tubes running time count or deterioration of the operating environment, dry, in a short time so that a sudden increase in the temperature of the steel pipe, the temperature reaches above the rated temperature, a tensile strength of steel sharp decline in...Read more -
Cause Analysis of Straight Seam Steel Pipe Wrong Side
Straight seam steel pipe production, the wrong side have occurred, many influencing factors. In practice, often by a dry wrong side super differential leaving the steel pipe downgrade. Cause analysis thus produces the wrong side of straight pipe joints and prevention measures are necessary. 1, St...Read more -
Straight Seam Steel Billet Piercing
Straight seam steel billet piercing temperature varies according to the raw material strange strange. Thermal expansion pipe but mostly in 1200 ℃, when the carbon content and other alloying elements more temperature slightly lower. The second key is to try to reduce the heating operation scale qu...Read more -
Control of 304 Stainless Steel Thick-walled Tube Grain Size
304 stainless steel thick-walled tube parts to control grain size during heat treatment is necessary, its quality heat-treated 304 stainless steel thick-walled tube has a very important impact. Here’s how to control the size of its grain size Method Summary as follows. (1) Choose a reasonab...Read more -
304 Stainless Steel Seamless Pipe Wear
304 stainless steel seamless pipe wear phenomenon is very common, many reasons for this phenomenon have physico-chemical and mechanical aspects, mainly by the abrasive wear, adhesive wear (glued), fatigue wear (pitting) corrosion and wear. 304 stainless steel seamless pipe and wear almost all pro...Read more -
How to Weld for Large-diameter Welded Steel Pipe at Low Temperatures
Under cold conditions a low-carbon steel welding, the cooling rate of the welded joint, which has made cracking tendency to increase, especially in the first weld Heavy structures susceptible to cracking, it is necessary to take the following process steps: 1) Do not possible under conditions of ...Read more