Strength of Double Welded Pipe in Industrial Applications

Short Description:

In the world of industrial piping, material selection and construction methods can have a significant impact on the overall performance and longevity of the system. One method that is popular for its strength and durability is to use double-welded pipe. These pipes are designed to withstand high pressures, extreme temperatures and harsh environmental conditions, making them ideal for a variety of industrial applications.

Send email to us

Product Detail

Product Tags

Double welded pipes are constructed with two independent welds to form a strong and reliable connection between pipe sections. This double welding process ensures that the pipe can withstand the stresses and strains that may be encountered during operation, making it a reliable choice for critical applications where failure is not an option.

One of the main advantages of double-welded pipes is their ability to handle high-pressure environments. The double welding process creates a seamless and strong connection between the pipe sections, ensuring they can withstand internal pressures without the risk of leaks or failure. This makes them ideal for applications such as oil and gas pipelines, where the integrity of the pipeline system is critical to safety and operational efficiency.

Table 2 Main Physical and Chemical Properties of Steel Pipes (GB/T3091-2008, GB/T9711-2011 and API Spec 5L)
Standard	Steel Grade	Chemical Constituents (%)						Tensile Property						Charpy(V notch)Impact Test
		c	Mn	p	s	Si	Other	Yield Strength（Mpa）		Tensile Strength（Mpa）		（L0=5.65 √ S0 ）min Stretch Rate （%）
		max	max	max	max	max	Other	min	max	min	max	D ≤ 168.33mm	D ＞ 168.3mm
GB/T3091 -2008	Q215A	≤ 0.15	0.25 ＜ 1.20	0.045	0.050	0.35	Adding NbVTi in accordance with GB/T1591-94	215		335		15	> 31
	Q215B	≤ 0.15	0.25-0.55	0.045	0.045	0.035		215		335		15	> 31
	Q235A	≤ 0.22	0.30 ＜ 0.65	0.045	0.050	0.035		235		375		15	>26
	Q235B	≤ 0.20	0.30 ≤ 1.80	0.045	0.045	0.035		235		375		15	>26
	Q295A	0.16	0.80-1.50	0.045	0.045	0.55		295		390		13	>23
	Q295B	0.16	0.80-1.50	0.045	0.040	0.55		295		390		13	>23
	Q345A	0.20	1.00-1.60	0.045	0.045	0.55		345		510		13	>21
	Q345B	0.20	1.00-1.60	0.045	0.040	0.55		345		510		13	>21
GB/T9711-2011（PSL1）	L175	0.21	0.60	0.030	0.030		Optional adding one of NbVTi elements or any combination of them	175		310		27		One or two of the toughness index of impact energy and shearing area may be chosen. For L555, see the standard.
	L210	0.22	0.90	0.030	0.030			210		335		25
	L245	0.26	1.20	0.030	0.030			245		415		21
	L290	0.26	1.30	0.030	0.030			290		415		21
	L320	0.26	1.40	0.030	0.030			320		435		20
	L360	0.26	1.40	0.030	0.030			360		460		19
	L390	0.26	1.40	0.030	0.030			390		390		18
	L415	0.26	1.40	0.030	0.030			415		520		17
	L450	0.26	1.45	0.030	0.030			450		535		17
	L485	0.26	1.65	0.030	0.030			485		570		16
API 5L （PSL 1）	A25	0.21	0.60	0.030	0.030		For grade B steel,Nb+V ≤ 0.03%;for steel ≥ grade B,optional adding Nb or V or their combination, and Nb+V+Ti ≤ 0.15%	172		310		（L0=50.8mm）to be calculated according to the following formula:e=1944·A0 .2/U0 .0 A:Area of sample in mm2 U: Minimal specified tensile strength in Mpa		None or any or both of the impact energy and the shearing area is required as toughness criterion.
	A	0.22	0.90	0.030	0.030			207		331
	B	0.26	1.20	0.030	0.030			241		414
	X42	0.26	1.30	0.030	0.030			290		414
	X46	0.26	1.40	0.030	0.030			317		434
	X52	0.26	1.40	0.030	0.030			359		455
	X56	0.26	1.40	0.030	0.030			386		490
	X60	0.26	1.40	0.030	0.030			414		517
	X65	0.26	1.45	0.030	0.030			448		531
	X70	0.26	1.65	0.030	0.030			483		565

In addition to its strength, double welded pipe is also able to withstand extreme temperatures, making it suitable for a variety of industrial processes. Whether transporting hot fluids or gases, or operating in environments with fluctuating temperatures, double welded pipe maintains its structural integrity and performance, ensuring reliable operation under even the most challenging conditions.

Additionally, the durability of double welded pipe makes it a cost-effective choice for industrial applications. Their ability to withstand wear, corrosion and other forms of degradation means they require minimal maintenance and replacement, reducing overall operating costs and downtime.

Overall, the use of double welded pipe provides a range of benefits for industrial applications, including strength, durability and reliability. Their ability to handle high pressures, extreme temperatures and harsh environmental conditions makes them ideal for a wide range of industries from oil and gas to chemical processing. With its proven performance and service life record, double welded pipe is a valuable asset to any industrial piping system.