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Comparison of ERW Welded Pipe and Seamless Steel Pipe (tested by PetroChina Pipe Institute)

1. Outer diameter tolerance ERW steel pipe : It is cold-formed and sizing is completed by reducing the diameter by 0.6%. The process temperature is basically constant at room temperature. Therefore, the outer diameter is controlled accurately and the fluctuation range is small, which is helpful to ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 4 days agoPress > ERW Welded PipeSeamless steel pipePetroChina Pipe +1

Processing of High-strength Petroleum Casing Wire Tube Above N80Q Grade

The production method of high-strength petroleum casing (above N80Q grade) is generally completed by steelmaking, rolling, quenching and tempering, and pipe processing. During the production process, the outer diameter of the tube blank is controlled during the processing of the wire. The requiremen ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 5 days agoPress > Petroleum CasingN80 casing pipeWire processing

Testing Methods of Oil Casing Manufacturers

What are the detection methods of oil casing pipe ? Let's take a brief look: 1. Ultrasonic testing When ultrasonic waves are spread in the tested raw materials, the acoustic characteristics of the raw materials and the changes in the internal organization have a positive impact on the spread of t ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 10 days agoPress > oil casingTesting MethodsManufacturers

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 13 days agoPress > ERWSMLSTechnical Indicators +1

Hardness Test Method for Seamless Steel Pipe

The hardness test of  seamless steel tube  can be divided into two methods, one is tensile test and the other is hardness test. The following small series is introduced in detail for everyone: The seamless steel pipe produced by the tensile test, the tensile tester of the sample will be pulled to t ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 20 days agoPress > Seamless steel pipeHardness Test

Non-Uniform Bearing of Oil Casing Reduces its Bearing Capacity

Oil casing pipe damage is one of the important factors affecting China's crude oil production. The reasons for its damage include non-uniform stress, corrosion, sand formation in oil layers, and high-pressure water injection. As for the strength of petroleum casing, the API standard does not clear ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 26 days agoPress > oil casingBearing Capacitytubing china

High-pressure Boiler Seamless Steel Pipe

High pressure boiler  seamless steel tube  is a kind of boiler tube, which belongs to the seamless steel tube category. The manufacturing method is the same as the seamless pipe, but there are strict requirements on the steel type used for manufacturing the steel pipe. High-pressure boiler seamless ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 27 days agoPress > Seamless steel pipeHigh-pressure BoilerSeamless Tube

Advantages of SML Steel Pipe and ERW Steel Pipe

ERW (high frequency straight seam welded pipe) steel pipe blanks are manufactured by hot-rolled steel strip cold rolling forming, while SML ( seamless steel tube ) steel pipe blanks are formed by perforating round steel in the hot-rolled state. Obviously, the SML formed in the hot-rolled state has a ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 1 month agoPress > SML steel pipeerw steel pipeAdvantages

Production Process of Hot-rolled Steel Strip for Petroleum Casing Pipe

J55 oil casing pipe is a kind of tubing used as the material of petroleum well wall for a long time. It is connected to thousands of kilometers of pipe string through special thread. In the downhole cementing process, it is mainly affected by the external squeeze force, internal pressure and axial ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 1 month agoPress > casing pipeHot-rolledProduction Process +1

How to Protect the Anode and Cathode of Petroleum Casing

With the rapid development of the petroleum industry, the severe corrosion of buried pipelines, oil well casings and storage tank bottom plates, especially oil well casings, in oilfields has severely affected the production, development, and environment of oilfields. There is corrosion on the inne ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 1 month agoPress > Petroleum CasingAnode and Cathodeanticorrosion methods

Comparison of Characteristics Between ERW Steel Pipe and Spiral Submerged Arc Welded Steel Pipe

Both straight seam resistance welded steel pipes ( ERW steel pipe ) and spiral submerged arc welded steel pipes ( SSAW steel pipe ) can better meet the requirements of oil and gas pipelines. For medium-diameter (Ф630mm) steel pipes, ERW steel pipes are mostly used abroad. Spiral submerged arc welded ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 1 month agoPress > erw steel pipeSpiral Submerged Arc Welded Steel Pipessaw steel pipe +1

Heat Treatment Technology of Rectangular Tube

In order to improve the surface hardness and abrasion resistance of rectangular tubes, some surface treatments can be performed on them, namely flame surface fire, high and medium frequency surface quenching, and some chemical heat treatment. Generally speaking, most high and medium frequency surfac ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 1 month agoPress > Rectangular TubeHeat Treatment Technology

Testing Method of Casing Pipe

Casing pipe is a high-end product for steel pipe production. There are many types of casing, and there are 15 kinds of casing diameter specifications. External diameter range is 114.3-508mm; steel types are J55, K55, N80, L-80, P-110, C-90, C-95, T-95, etc. 11 kinds; casing end buckle type and var ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 1 month agoPress > casing pipeTesting Method

How to Control the Special Oil Pipe

How to control the special oil pipe? Let us briefly understand: Valves are mechanical devices used to open, close, and perhaps regulate the flow of media in pipes. There are many types of valves, and there are many types of classification. If it is differentiated by purpose, it can be divided into ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 1 month agoPress > Special Oil Pipecontrolvalves

How to Derust the Seamless Steel Pipes

Types of rust of seamless steel pipes : Generally speaking, the rust on the surface of American standard steel pipes can be divided into floating rust, medium rust, and heavy rust according to the time of shipment, storage and transportation conditions, and humidity. Floating rust: Generally, when ...

lvy lee - Permanent Steel Manufacturing Co.,Ltd


Posted 1 month agoPress > Seamless Steel PipesDerust