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Comparison of ERW and LSAW Steel Pipes

" ERW steel pipe " is a high-frequency straight seam resistance welded pipe. It is used to transport vapor and liquid objects such as oil and natural gas, and can meet various requirements of high and low pressure. At present, it plays a pivotal role in the field of transportation pipes in the world ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 13 days agoPress > erw steel pipelsaw steel pipeComparison

Precautions for Seamless Steel Pipe Production

Cold drawn precision  seamless steel tube  has the characteristics of no oxide layer on the inner and outer walls, high pressure without leakage, high precision, high smoothness, no deformation during cold bending, no flaring and no cracks, and antirust treatment on the surface. It is mainly used fo ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 16 days agoPress > Seamless steel pipeProductionPrecautions

Classification of Oil Casing Materials

There are many types, the basic ones are ordinary carbon steel , J55, L80, N80, P110, etc .; then there are more special materials, such as 3Cr, 9Cr, 13Cr, 22Cr, etc., which are mainly carbon dioxide-resistant; and materials that prevent hydrogen sulfide , Such as 90SS, 95SS, etc. In addition, high ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 20 days agoPress > oil casingMaterials

Differences Between Electric Resistance Welding and Electric Fusion Welding

ERW is the abbreviation of electric resistance welding . The welding method of ERW pipe and submerged arc welded pipe is significantly different. The pressure welding method without filler metal is adopted. The weld is not filled with other components, and the skin effect and the proximity effect o ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 24 days agoPress > Electric Resistance WeldingElectric Fusion WeldingEFW +1

Disadvantages of Outer Thick Tubing

1. Low processing efficiency, serious waste of factory capacity Although the thickened tubing increases the connection strength of the tubing, the thickening of the tubing must be achieved through the thick and secondary heat treatment process. The efficiency is extremely low, and once the thread ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 27 days agoPress > tubingOuter Thick TubingDisadvantages

Corrosion Protection of Oil Casing Pipe

Petroleum  casing pipe  can be roughly divided into 4 types according to different usage methods: surface casing, intermediate casing, production casing, and drilling casing. Surface casing is mainly used to suspend and support the subsequent layers of casing through a casing head installed on the ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 1 month agoPress > casing pipeCorrosion Protectionoil casing

Comparison of Performance and Technical Indicators of ERW and SML

1. Tube blank quality ERW steel pipe  special steel has high purity. Through de-S, de-P, de-aeration, Ca treatment and other methods, the S and P content can be controlled below 0.005%, the N content can be controlled below 0.008%, the shape of the inclusions can be controlled to be spherical and t ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 1 month agoPress > erw steel pipesmls pipeTechnical Indicators +1

Defects in Welding of Seamless Steel Tubes

The  seamless steel tube  is still quite a substitute in the production process. The reason for this situation of the seamless steel tube is that the forming gap changes too much, there are small burrs or small gaps on the edge of the strip, the forming is wrong, the welding wire diameter is uneven ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 1 month agoPress > seamless steel tubewelding defects

Common Anticorrosion Methods for Offshore Oil Casing Pipe

The corrosion problem of downhole oil  casing pipe  in China's offshore oil and gas fields is extremely serious, which seriously affects the service life of downhole oil casing and normal production of oil and gas fields. Through cement sealing, corrosion-resistant alloy pipes, injection of corrosio ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 1 month agoPress > anticorrosion methodsoffshore oilcasing pipe

Annealing Process of Seamless Steel Pipe

Annealing process of  seamless steel pipe : 1. Fully annealed. It is used to refine the coarse and superheated structure with poor mechanical properties in medium and low carbon steels after casting, forging and welding. The workpiece is heated to a temperature between 30 and 50 ° C above the temper ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 1 month agoPress > Seamless steel pipecarbon steelannealing process

API Coupling for Tubing and Casing Pipe

The  casing pipe  coupling is a kind of oilfield drilling tool, which is mainly used for the connection of the oil pipe, and mainly solves the problem that the existing coupling easily generates fatigue fracture due to stress concentration. The tubing coupling structure is: the tubing end is connec ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 1 month agoPress > couplingcasing pipetubing

Technical Requirements for Heat Preservation of Spiral Steel Pipes

After the heat insulation treatment of spiral steel pipes( SSAW steel pipe ), people are accustomed to call them heat insulation steel pipes.The insulation layer of heat insulation steel pipes is filled with rigid polyurethane foam. The quality requirements for the insulation layer of spiral steel p ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 1 month agoPress > spiral steel pipessaw steel pipeheat preservation +1

Oil Casing Pipe Tempering Process and Category

The tempering process of the  casing pipe  is a heat treatment process of reheating the quenched workpiece to a suitable temperature lower than the lower critical temperature, and cooling to room temperature in a medium such as air or water or oil after a certain period of time. The purpose of temp ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 2 months agoPress > casing pipeTempering ProcessCategory

Specification and Requirements for Seamless Steel Pipe Marking

In the relevant regulations, there are a series of regulations and requirements for  seamless steel pipe  marking. The specific requirements for the logo are as follows: 1. The seamless steel pipe manufacturer's logo should be eye-catching, firm, clear, standardized, and not easy to fade. 2. The m ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 2 months agoPress > Seamless steel pipemarking3PE

What are the Detection Methods of Oil Casing Pipes?

What are the detection methods for casing pipes ? Let's take a brief look: 1. Ultrasonic testing. When ultrasonic waves are scattered in the tested raw materials, the acoustic properties of the raw materials and the transformation of the internal structure have a positive impact on the disseminat ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 2 months agoPress > casing pipeN80 oil casingDetection Methods