Size Deviation of SSAW Steel Pipe

Size deviation mainly in the SSAW steel pipe is straightness, roundness, aspects of uneven thickness.

In most cases, straightness tolerance for the use of spiral steel pipe under large, but the manufacturing standards for spiral pipe straightness requests, if the predetermined value is exceeded, would constitute a reason to return, and therefore, spiral pipe plant should still be noted.

Roundness tolerance will affect the use of spiral steel pipe, mainly in the group of the wrong side of the welding head. Roundness tolerance has led to the wrong side of the welded joint will not only reduce the pressure capability, but also stress concentration. When the site Group, roundness some pipe can be corrected. Outside diameter deviation and the impact on the spiral steel pipe used roundness tolerance fairly.

Non-uniform wall thickness generally easy to be ignored, and many spiral steel pipe standards are not clearly defined. If the wall thickness Uneven, it will not only result set to the wrong side of the joint, but also the secondary deformation processing (such as steel pipe manufacturing pipe) adversely affected.

Lamination Defect Control Measures of Spiral Steel Pipe

Lamination defect control measures of spiral steel pipe is following below:

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1, to improve the toughness of plastic tube
Improve the cleanliness of molten steel, to reduce the harmful inclusions; increase the proportion of the slab crystal axis, to reduce the center segregation and center porosity; the use of reasonable cooling system to avoid cracks occur within the slab; billet or rolling slab to be taken offline slow cooling process, reduce internal stress, thus ensuring the microstructure and mechanical properties of the finished tube and pipe meet the technical standards.

2, the reasonable control of the heating temperature
By measuring the thermoplastic curve, choose the best heating temperature. Note also that there is enough heating tube holding time, in order to reduce and improve plastic deformation resistance and toughness.

3, lower roll speed
Roll speed is a key parameter piercing process, the roll speed from low to high variations in the process, there is a critical stratification began the roll speed. Lower roll speed, easy to form tube bore; higher roll speed, tube and capillary easily form a layered defects. In order to eliminate delamination defects and capillary tube, roll speed should be reduced to the beginning of the critical delamination roll speed or less.

Order---SSAW Steel Pipe shipped to Nigeria

Product: SSAW steel pipe, Spiral Submerged Arc Welded, Carbon Steel
Standard: API 5L PSL1 GR.B
Specification: 1000mm*20mm*29.2meters
Surface: 3PE anti-corrosion coated
Ends: Plain End
Quantity: 896 Tons
Production Time: 35 days
Destination: Nigeria info@primesteeltube.com

 

Order---SSAW Steel Pipe with 3PE coating shipped to Saudi Arabia

Product: SSAW Steel Pipe, Submerged Arc Welded, Carbon Steel Pipe
Standard: API 5L X52
Specification:
508mm*7.92mm*1200mm
610mm*6.4mm*1200mm
1067mm*9.35mm*1200mm
1219mm*7.92mm*1200mm
Surface: 3PE anti-corrosive Coating (2mm coating thicnkness)
Ends: Bevelled Ends
Quantity: 1228 Tons
Destination: Saudi Arabia

For more finished SSAW Steel Pipe order, please read Order---SSAW Steel Pipe shipped to Nigeria

  

  

Tianjin Shinestar Steel Pipe Manufacturing Co., Ltd started production in December 2015

Tianjin Shinestar Steel Pipe Manufacturing Co., Ltd as the largest factory has started production in December 2015.


The new factory is located in Tianjin Jinghai Economic Development Zone. This project started in September 2012 and finished in October 2014. After one year of preperation for production facilities, the factory was officially start production in December 2015. The total investment for this project is around 270 million RMB, and most of our investment is on R&D production equipment. The production lines including for scaffolding pipe, oil casing (ERW Steel Pipe) and SSAW steel pipes. The annual production quantity reaches 150,000 tons of scaffolding pipe, 100,000 tons of oil casing pipe, and 200,000 tons SSAW steel pipes. At present, we have set up 8 production line for Scaffolding Pipes, 2 production line for oil casing pipe, and 4 production line for SSAW Steel Pipe. In the next coming year, we will keep investing two more production line for ERW Steel Pipes. In the next five years, we will have our own Steel Industrial Zone.


" This factory is the first production factory that Shinestar Holdings Group owns the full responsibility. We are committed to building high yield, good performance, and world-class quality steel pipes. Meet customers' increased demand and enhance competitive advantages in the international market is our final goal." Said by Shinestar Holdings Group Vice President. Tianjin Shinestar Steel Pipe Manufacturing Co., Ltd is under the Shinestar Hodings Group and defined as the most important steel pipe production factory in the north of China. Our production will in accordance with the API and ASTM international standard, the products quality will highly meet our international clients' needs. Shinestar Holdings Group will continue to adhere to international development strategy, global distribution, outstanding talent competition, and effective cost control.