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Carbon steel piping passivation
Carbon steel pipe surface passivation method is the preparation of a good passivation solution at room temperature with a hair brush to the part of the steel parts need passivation, steel workpiece storage time in the ventilation to control the deposit orremoved. Steel workpiece surface generates...Read more -
ASTM A53
Standard BS 1387, BS EN 10297, BS 4568, BS EN10217, JIS G3457 Grade 10#-45#, Cr-Mo alloy, 15NiCuMoNb5, 10Cr9Mo1VNb, A53-A369 Out diameter 21.3 - 610 mm Wall thickness 2 - 50 mm Section Shape Round Application Fluid Pipe Surface Treatment varnished,cap,marking Certification API ...Read more -
Welded Steel Pipe Usages and Recommendations
Chain vises are one of the most important welding technologies and tools and they are made with jaws for holding welded steel pipe. In fact, jaws are engineered so they can provide holding power without causing any damage to the pipe. However, we should never use dry granular calcium hypochlorite...Read more -
Seamless steel pipe piercing theory
In the seamless steel pipe production, the role of the perforation process is to wear a solid hollow tube capillary. As a first step of perforated metal deformation, wear thick pipe wall thickness, length is shorter, poorer quality of inner and outer surfaces, so called capillary. If there are so...Read more -
Importance of Right Filler Metal for Welded Steel Pipe
In the welding process of large welded steel pipe, we should pay great attention to the melted region of the work piece and form a molten solder, because the melted region is the connection of cooling and solidifying the material after the pool is formed. Usually, the pressure is required by lar...Read more -
High frequency pipe manufacturing control
1.The pipe weld gap control Adjust the amount of squeezing rollers squeeze, so keep the flush weld ends, the opening angle of 7 degrees or less, the weld gap control between 1-3 mm. Weld control is too large, it may appear bad, weld cracking to produce incomplete fusion or weld control is too sma...Read more -
Comparison of high frequency induction welding with high-frequency resistance welding
High-frequency resistance welding basic principle: a pair of electrodes two leg edge contact with the tube, directly to the edge of the input frequency current tube, using high frequency current of the skin effect and proximity effect, so that the current is highly concentrated in the edge of the...Read more -
Application of Protection coating for reinforced concrete
Changes of concrete alkaline state would destroy the steel surface of the passive film, then there reinforcement the localized corrosion. Corrosion of reinforcement is reinforced concrete structure damage and one of the main causes of early failure. With domestic steel corrosion in concrete struc...Read more -
What is Structural Tubing
Most people don’t even notice structural tubing, but it is an integral part of everyday life for many people. This sturdy alternative to solid steel is used in an impressive array of industries and products, from shopping carts to hand rails to truck bumpers. These tubes come in many shapes...Read more -
Transverse crack weld
Transverse crack weld in weld metal solidification crystallization process produces. Solidification, low melting point eutectic enrichment at the grain boundaries, a “liquid film”, due to the weld solidification shrinkage by tensile stress, eventually cracking the formation of cracks,...Read more -
Thermal Expansion Steel Pipe
Thermal expansion steel pipe means that the density is relatively low, but a strong contraction of the steel pipe, (seamless steel pipe) can be referred to as thermal expansion. Expanded by cross rolling method or methods of pipe diameters drawing a blank pipe finishing processes. In a short peri...Read more -
The pipeline classification and grading
The pipe is coupled into the device for conveying gas, liquid or solid particles in the fluid pipe, pipe couplings and valves. The pipeline project is a very widely used construction technology, occupies an important position in the construction project, the type of pipeline, mainly in the transp...Read more