Product Details

API 5L Psl1 SSAW Steel Pipe Carbon steel API 5L LSAW tube. API 5L LSAW pressure tube. API 5L saw pipe distributor. Stott alloy FZE is a well-known supplier and supplier of various API 5L LSAW carbon steel tubes. This is extensive. Used to transport liquid when critical temperature rises. Carbon steel API 5L long vane...

Brief Introduction

API 5L Psl1 SSAW Steel Pipe

Name	SSAW steel pipe
Nominal size	1-8 Inch
Out diameter	21.3-219.1mm
Thickness	0.5-8.0mm
Materials	Q235A, Q235B, 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb
Appearance	Generally smooth, bright
Packing	Export standard packing or according to customers’ requirement
Certificate	ISO9001:2008,SGS
Shipment	Within10-15 workdays,25-30days when the quantity beyond 1000tons

image001_副本

X70 pipeline site welding technology and quality control points

The X70 pipeline steel is API 5L pipeline steel with a minimum yield strength of 70300psi, or 485 MPa.In fact, in the standard of API 5L, the pipeline steel pipe is divided into two grades, that is, PLS1 steel pipe that only requires strength grade and PSL2 steel pipe that requires more performance parameters. PSL2 steel pipe is required to mark its rolling method, such as thermo-mechanical controlled rolling, marked with M, and Q for quenching.

PSL1 steel tube minimum yield strength minimum tensile strength weld minimum tensile strengthMPa (psi) MPa (psi) MPa (psi)L485 or X70 485 (70300) 570 (82700) 570 (82700) Table 2 performance requirements for PSL2 grade steel tubesThe yield strength and tensile strength of PSL2 steel tube are stronger than the tensile strength of weldMPa (psi) MPa (psi) MPa (psi)L485 or X70 min Max min Max min0.93 570 485 635 570 760(70300) (92100) (82700) (110200) (82700)Note: for pipe diameter 1219, Kv=54J,General D the impact energy requirements of the 1422 mm diameter 27 j, 0 ° C

At present, the X70 pipeline steel tubes are all micro-alloy carbon-manganese steels controlled by ligation. The micro-alloy mainly consists of Nb, V and Ti, and the total content of the micro-alloy does not exceed 0.15%.Therefore, the structure of pipeline is composed of acicular ferrite and bainite, and generally has good welding performance.According to the literature, in order to avoid the occurrence of crack, require a minimum of 100 ° C welding preheating requirements.

2 overview of X70 steel tube wire ring peak welding processSince the large-scale adoption of X70 steel pipe in the west-east natural gas transmission project, a variety of welding process combinations have been tested in the field girth seam welding, mainly including the following two types

(1) cellulose electrode root welding with flux cored wire filling cover technologyThis process is generally used for all the mainline welding except the automatic welding adopted in the western part, which belongs to the semi-automatic welding method.

(2) automatic welding combinationAutomatic welding of roots and other passes by mixed gas shield.Due to the adoption of no liner welding root welding, so there is the use of multiple internal welding machine welding root welding, or the car crawling welding, or Lincoln STT technology welding root welding and other methods.

The Process Flow

螺旋1

The Application

The Workshop

Cangzhou Steel Pipe Group (CSPG)Co.,Ltd.

has more than eighteen years history company which located in Lecong Iron and Steel World, a well-known steel distribution center in China, with superior geographical position and convenient water and land transportation.

We are a direct-selling manufacturer specializing in the research and development of spiral steel pipes, steel coiled pipes, anti-corrosion steel pipes inside and outside. Since its inception, the company has been guided by a brand-new thinking of steel pipe product market based on the business philosophy of honesty, pragmatism and knowledge-seeking.