Advantages of Double Submerged Arc Welded Gas Line Pipe

Short Description:

Welcome to Cangzhou Spiral Steel Pipe Group Co., Ltd., a well-known manufacturer and supplier of high-quality spiral welded carbon steel pipes. Our company is proud to utilize innovative spiral submerged arc welding technology that guarantees the production of top-notch spiral seam pipes for a variety of applications.

Send email to us

Product Detail

Product Tags

In the world of plumbing, there are a variety of construction methods and materials. A popular pipe joining method is double-ended submerged arc welding (DSAW). This technique is commonly used on gas and water lines, and for good reason. In this blog we will explore the advantages of using double submerged arc welded pipe in these applications.

The Mechanical Properties of the SSAW pipe

steel grade	minimum yield strength Mpa	minimum Tensile strength Mpa	Minimum Elongation %
B	245	415	23
X42	290	415	23
X46	320	435	22
X52	360	460	21
X56	390	490	19
X60	415	520	18
X65	450	535	18
X70	485	570	17

The Chemical composition of the SSAW pipes

steel grade	C	Mn	P	S	V+Nb+Ti
	Max %	Max %	Max %	Max %	Max %
B	0.26	1.2	0.03	0.03	0.15
X42	0.26	1.3	0.03	0.03	0.15
X46	0.26	1.4	0.03	0.03	0.15
X52	0.26	1.4	0.03	0.03	0.15
X56	0.26	1.4	0.03	0.03	0.15
X60	0.26	1.4	0.03	0.03	0.15
X65	0.26	1.45	0.03	0.03	0.15
X70	0.26	1.65	0.03	0.03	0.15

The Geometric tolerance of the SSAW pipes

Geometric tolerances
outside diameter		Wall thickness		straightness		out-of-roundness		mass	Maximum weld bead height
D		T
≤1422mm	＞1422mm	＜15mm	≥15mm	pipe end 1.5m	full length	pipe body	pipe end		T≤13mm	T＞13mm
±0.5% ≤4mm	as agreed	±10%	±1.5mm	3.2mm	0.2% L	0.020D	0.015D	‘+10% -3.5%	3.5mm	4.8mm

Hydrostatic Test

product-description1

The pipe shall withstand the hydrostatic test without leakage through the weld seam or the pipe body
Jointers need not be hydrostatically tested, providedthat the portions of pipe used in marking the jointers were successfully hydrostatically tested prior to the joining operation.

First, double submerged arc welding is an efficient and economical method of joining pipes. The process involves forming a weld by dipping the pipe into a granular flux using two welding arcs. This creates a strong and durable weld that can withstand high pressure and tension, making it ideal for gas and water lines.

One of the main advantages of double submerged arc welded pipe is its corrosion resistance. The granular flux used in this welding process creates a protective layer over the weld, helping to prevent corrosion and extend the life of the pipe. This is especially important for water line tubing, as it ensures that the water delivered remains clean and free of contamination.

In addition to corrosion resistance, double submerged arc welded pipes offer excellent mechanical properties. This method produces uniform welds and a strong and reliable pipe. This is critical for natural gas pipelines as it ensures safe and efficient transportation of natural gas without the risk of leaks or failures.

Additionally, double submerged arc welded pipes are able to withstand extreme temperatures and environmental conditions. This makes them ideal for onshore and offshore applications that may be exposed to harsh weather and operating conditions. For water line tubing, this durability ensures that the pipes can move water efficiently without compromising performance.

Another advantage of using double submerged arc welded pipe is that its surface is smooth and beautiful. This makes them an attractive option for above- and below-ground installations, as they are easy to inspect and maintain. Additionally, the smooth surface of the weld reduces friction and pressure drop within the pipe, helping to improve the overall efficiency of gas and water delivery systems.

In conclusion, double submerged arc welded pipe is a very advantageous choice for gas line pipe and water line tubing. Its efficient and cost-effective welding process, coupled with corrosion resistance, excellent mechanical properties, durability and aesthetics, make it the first choice for pipeline construction. Whether transporting natural gas or water, these pipelines provide the strength and reliability needed to operate safely and efficiently. Clearly, double-layer submerged arc welded pipe is a valuable asset in the pipeline construction world.

Previous: Spiral Submerged Arc Welded Pipe In API 5L Line Pipe Applications

Next: Advantages Of Using Spiral Submerged Arc Welded Steel Pipes For Underground Water Pipelines

ASTM A139