Improving Infrastructure Efficiency with S355 JR Spiral Steel Pipe: A Game Changer for Modern Natural Gas Pipelines Construction

Short Description:

This part of this European Standard specifies the technical delivery conditions for cold formed welded structural, hollow sections of circular, square or rectangular forms and applies to structural hollow sections formed cold without subsequent heat treatment.

Cangzhou Spiral Steel Pipes Group Co., Ltd supplies hollow section of circular forms steel pipes for structure.


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Introduction:

The growing demand for efficient and reliable energy has become an important concern for governments and industries around the world. Since natural gas pipelines are the arteries of natural gas transportation, pipeline material selection is critical to ensuring a seamless and sustainable energy supply. In this blog, we explore how S355 JR spiral steel pipe, also known as helical seam pipe, is revolutionizing natural gas pipeline construction, improving safety, durability and transportation efficiency.

Mechanical Property

steel grade

minimum yield strength
Mpa

Tensile strength

Minimum elongation
%

Minimum impact energy
J

Specified thickness
mm

Specified thickness
mm

Specified thickness
mm

at test temperature of

 

<16

>16≤40

<3

≥3≤40

≤40

-20℃

0℃

20℃

S235JRH

235

225

360-510

360-510

24

-

-

27

S275J0H

275

265

430-580

410-560

20

-

27

-

S275J2H

27

-

-

S355J0H

365

345

510-680

470-630

20

-

27

-

S355J2H

27

-

-

S355K2H

40

-

-

Chemical Composition

Steel grade

Type of de-oxidation a

% by mass, maximum

Steel name

Steel number

C

C

Si

Mn

P

S

Nb

S235JRH

1.0039

FF

0,17

1,40

0,040

0,040

0.009

S275J0H

1.0149

FF

0,20

1,50

0,035

0,035

0,009

S275J2H

1.0138

FF

0,20

1,50

0,030

0,030

S355J0H

1.0547

FF

0,22

0,55

1,60

0,035

0,035

0,009

S355J2H

1.0576

FF

0,22

0,55

1,60

0,030

0,030

S355K2H

1.0512

FF

0,22

0,55

1,60

0,030

0,030

a. The deoxidation method is designated as follows:

FF: Fully killed steel containing nitrogen binding elements in amounts sufficient to bind available nitrogen (e.g. min. 0,020 % total Al or 0,015 % soluble Al).

b. The maximum value for nitrogen does not apply if the chemical composition shows a minimum total Al content of 0,020 % with a minimum Al/N ratio of 2:1, or if sufficient other N-binding elements are present. The N-binding elements shall be recorded in the Inspection Document.

Hydrostatic Test

Each length of pipe shall be tested by the manufacturer to a hydrostatic pressure that will produce in the pipe wall a stress of not less than 60% of the specified minimum yield strength at room temperature. The pressure shall be determined by the following equation:
P=2St/D

Permissible Variations In Weights and Dimensions

Each length of pipe shall be weighed separately and its weight shall not vary more than 10% over or 5.5% under its theoretical weight, calculated using its length and its weight per unit length
The outside diameter shall not vary more than ±1% from the specified nominal outside diameter
Wall thickness at any point shall not more than 12.5% under the specified wall thickness

Helical Welded Pipe

1. Understand S355 JR spiral steel pipe:

S355 JR spiral steel pipe is made of high-grade S355JR steel and is a spiral seam pipe specially designed for gas pipeline construction applications. The spiral seam structure gives the pipeline excellent strength and flexibility, making it ideal for long-distance transmission and transportation of natural gas. Its robustness ensures resistance to external factors such as ground movement, seismic activity and soil corrosion, thereby ensuring the longevity and integrity of the natural gas pipeline system.

2. Safety first:

The reliability and safety of natural gas pipelines are critical to the well-being of communities and the environment.  The superior strength and durability of S355 JR spiral steel pipe play an important role in reducing the risk of leaks, breaks and subsequent accidents. Thanks to its spiral seam construction, the pipe’s structural integrity remains intact even in challenging terrain or extreme weather conditions. Incorporating this pipeline into the natural gas pipeline system significantly reduces the potential for environmental hazards and allows for uninterrupted flow of natural gas to end users.

3. Durability of sustainable infrastructure:

The superior durability of S355 JR spiral steel pipe ensures the longevity of your gas pipeline infrastructure, saving maintenance and replacement costs over time. The pipeline is made of high-grade S355JR steel, which has excellent corrosion resistance, impact resistance and wear resistance. This resistance reduces repairs and replacements, thereby reducing the overall environmental impact and carbon emissions associated with pipeline maintenance and reconstruction.  The extended life cycle of S355 JR spiral steel pipe directly contributes to a more sustainable and environmentally friendly gas pipeline system.

4. Improve transportation efficiency:

Efficiency in natural gas transportation involves minimizing energy losses and maximizing transmission capacity.  The spiral seam structure of S355 JR spiral steel pipe allows for smooth, constant air flow, minimizing friction losses while maximizing the pipeline’s transportation capacity. The pipe has a uniform internal surface that ensures optimized flow dynamics, thus reducing energy consumption and increasing efficiency. Additionally, the pipe’s lightweight nature makes handling, transportation and installation more manageable, saving time and cost during construction.

Conclusion:

Incorporating S355 JR spiral steel pipe into natural gas pipeline construction has been proven to improve infrastructure efficiency. The pipeline’s exceptional strength, durability and safety features facilitate the seamless flow of natural gas, reducing the risk of accidents, environmental hazards and maintenance costs. By optimizing transport efficiency and minimizing energy losses, the pipeline plays a key role in meeting growing energy demand while embracing sustainable practices. Investing in innovative solutions such as S355 JR spiral steel pipe is vital for governments, industry and communities to ensure a reliable, efficient energy supply and pave the way for a clean energy future.


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