Cold Formed Welded Structural For Fire Pipe Line

Short Description:

Spiral seam welded pipes play a vital role in various industries, especially in cold formed welded structures and fire pipe line. These pipes are made by continuously bending steel strips into spiral shapes and then welding the spiral seams to form long continuous pipes. They are widely used for transporting liquids, gases and solid materials, as well as in structural and industrial applications.

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In cold formed welded structural applications, spiral seam welded pipe is critical to building durable and reliable structures. These pipes are typically made from high-quality steel and can withstand heavy loads, making them ideal for bridges, buildings and other infrastructure projects. Mechanical Property

steel grade	minimum yield strength		Tensile strength		Minimum elongation	Minimum impact energy
	Mpa				%	J
	Specified thickness		Specified thickness		Specified thickness	at test temperature of
	mm		mm		mm
	＜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.

In addition, in fire protection pipelines, the use of spiral seam welded pipes is crucial to ensure the safety and reliability of the system. These pipes are specially designed to withstand high temperatures and pressures and are suitable for use in fire protection systems. The welded construction of spiral seam pipe ensures that it is leak-proof and maintains structural integrity even under extreme conditions, making it an important component of fire protection and fire suppression systems.

One of the main advantages of spiral seam welded pipe is its versatility and adaptability to a variety of applications. These pipes can be manufactured in a variety of diameters and thicknesses to meet specific project requirements. In addition, they can be coated with protective materials to enhance corrosion resistance and extend their service life, making them suitable for use in different environments and conditions.

Spiral seam welded pipes have clear advantages when it comes to installation and maintenance. They are lightweight and flexible, making them easy to transport and handle, reducing installation time and labor costs. Additionally, its long, continuous length minimizes the need for additional connections, reducing the risk of leaks and ensuring a more efficient and reliable piping system.

In conclusion, spiral seam welded pipe is an important component in various industries, especially in cold formed welded structures and fire pipe line applications. Its durable construction, high performance and adaptability make it the first choice for engineers, contractors and project managers. Whether building strong structures or designing safe and reliable fire protection systems, spiral seam welded pipes are an indispensable solution to the needs of modern infrastructure and industry.