Residential Gas Types Pipelines

Residential Gas Types Pipelines

Cold rolled seamless steel pipe
Grade GB Q195 GB Q195-Q235
Section Round, Square, Rectangular, LTZ
Surface Oiled, Galvanization,epoxy coating Or Painted as request
Thickness 0.5-1.5mm
OD 15-100mm
15*15-75*75mm
10*20-40*80mm
Length 5.8m , 6m , 12m or as request
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Product Details


Product Details

Residential Gas Types Pipelines It can destroy the cast structure of ingot, refine the grain of steel and eliminate the defect of microstructure, so that the microstructure of steel is compacting and the mechanical properties are improved.

residential pipe lining specifications



Brief Introduction

Residential Gas Types Pipelines


Cold rolled

Hot rolled



Grade

GB Q195

Grade

GB Q195-Q235

Section

Round, Square, Rectangular, LTZ

Section

Round, Square, Rectangular

Technique

ERW

Technique

ERW

Surface

Black, Oiled,

Surface

Black, Oiled,


Or Painted as request


Or Painted as request

Thickness

0.5-1.5mm

Thickness

1.5-12mm

OD

15-100mm

OD

21-508mm


15*15-75*75mm


20*20-500*500mm


10*20-40*80mm


20*30-300*600mm

Length

5.8m , 6m , 12m or as request

Length

5.8m , 6m , 12m or as request

Tolerance

Thickness : +/- 0.05mm

Tolerance

Thickness : +/- 0.25mm


OD: +/- 0.5mm


OD: +/- 2mm


Length : +/-20mm


Length : +/-20mm

Package

In bundles

Package

In bundles


Or wrapped with woven cloth as request


Or wrapped with woven cloth as request

Hot rolled

Characteristics of hot rolling process introductions


It can destroy the cast structure of ingot, refine the grain of steel and eliminate the defect of microstructure, so that the microstructure of steel is compacting and the mechanical properties are improved.The improvement is mainly reflected in the rolling direction so that the steel is no longer isotropic to some extent.Bubbles, cracks and looseness formed during pouring can also be welded under high temperature and pressure.


After hot rolling, the non-metallic inclusions (mainly sulphides and oxides, as well as silicates) inside the steel are laminated and layered.Delamination greatly deteriorates the tensile properties of steel along the thickness direction and may cause interlaminar tears when the weld seams shrink.The local strain induced by weld shrinkage is often several times of yield point strain and much larger than that caused by load.






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