Longitudinally Welded Pipes

You can have confidence in purchasing customized Longitudinally Welded Pipes from us. With our extensive years of production experience, our quality far surpasses the industry standards, yet we remain committed to enhancing the quality and delivery time to guarantee our customers receive the utmost in product excellence. The installation and utilization of straight jointed steel pipes involve stringent technical requirements and should be executed in accordance with the actual conditions and operational procedures to ensure the highest quality.

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Product Description

Prior to utilizing the Longitudinally Welded Pipes, construction preparation is crucial. This involves excavating the pipe trench and completing the pipe shaft masonry. To accomplish this, equipment such as electric welding machines, cutting machines, electric hammers, and polishing machines are required for the installation of the straight jointed steel pipe.

As a professional manufacturer, we are pleased to offer you Pengfa Longitudinal Welded Pipes for Ground Pile. These Longitudinally Welded Pipes, also known as Straightsteel pipes, are commonly used as general welded pipes for transporting low-pressure fluids. They are made from materials like Q195, Q215A, and Q235A steel, or plain carbon Q235B. These pipes can also be manufactured alongside easily weldable 0317 standard model 6012 and steel grade 755 mild steel. Steel pipes undergo rigorous testing, including water pressure, bending, flattening, and others, and have specific requirements for surface quality. Typically, the delivery length ranges from 4 to 10 meters, and often, fixed lengths (or double lengths) are requested for delivery.

The specification of Longitudinally Welded Pipes is denoted by the nominal diameter (mm or inch), which differs from the actual diameter. Based on the specified wall thickness, Longitudinally Welded Pipes are categorized into ordinary steel pipe and thickened steel pipe. The welding process for submerged arc welding straight seam steel pipe employs submerged arc welding technology, utilizing filler welding and particle-protected flux submerged arc. The production diameter can reach up to 1500mm. LSAW stands for the English abbreviation of Submerged Arc Welding Straight Seam Steel Pipe. The production techniques for submerged arc welding straight seam steel pipe include JCOE forming technology and rolling forming submerged arc welding technology.

For pipes with larger diameters, rolling may involve the use of two steel plates, resulting in a double-weld phenomenon. Applicable standards include GB/T3091-2008 for low-pressure fluid steel pipe production, GB/T9711.1-2-1997 for oil and gas steel pipe production and usage, as well as American Longitudinally Welded Pipe execution standards. The production materials range from Q195A-Q345E, 245R, Q345QA-D, L245-L485, and X42-X70. Key pressure parameters are denoted as 2ST/T, where S represents the yield strength and T signifies the wall thickness. Submerged arc welding has evolved to include two-wire and multi-wire submerged arc welding, further enhancing its efficiency.

Product Parameter (Specification)

Cold Drawn		Lu Li		12m5130	Lu Li		12m5030	Tobacco Big Seamless		Giant Energy Expansion 7 mm
14*2-3	12000	57*3. 5		12m5130	140*4		12m5030	325*6.5	5500	Giant Energy Expansion 7 mm
16*2-4	8600	60*3.5		5000	140*5		4850	325*7 Big Seamless	5260	377	5150
18*2-4	8300	76*3. 5		4880	140*6		4630	325712	5450	426	5150
21*2-4	6900	76*4		4800	140*10		4630	325*9		8 mm
22*2-4	6900	89*4		4800	159*4.5		4880	325*10		377	4850
25*2-5	6300	108*4		4800	159*5		4660	356*8	5300	406	4850
27*2-4	6300	76*4. 5		4690	159*6		4630	356*8.5	5300	426	4850
27*5-6	6300	89*4.5		4690	159*7		4630	356*9	5300	457	5000
32*2.5	5800	108*4. 5		4690	159*8		4630	377*8Baotou Steel	5450	480-530	5000
32*3	5250	73*5		4630	168*5		4750	377*8Tobacco		610-630	5200
32*3. 5-4	5250	76*5		4630	168*6		4580	377*9 Tobacco		9 mm
32*4.5	5250	89*5		4630	168*6.7		4580	377*9.5	5280	426-457	4800
34*3	5250	89*5.2		4630	168*7		4580	377*10	5280	480-530	4800
34*3. 5-4	5250	108*5		4630	219*6		4750	377*12	5300	610-630	4800
34*5-6	5250	76*6		4600	219*6.5		4760	406*9.5	5300	720	5100
38*3-4	5200	89*6		4600	219*7		4560	406*10	5300	820	5200
38*5-6	5200	108*6		4600	219*7.8		4560	426*8	5400	10mm
Hot Rolled		114*4		4900	219*8		4560	426*9	5400	377*10	4750
42*3	4950	114*4. 5		4750	219*10			426*9.5	5300	426*10	4750
42*3. 5-4	4800	114*5		4630	273*6.5		4980	426*10	5300	480*10	4750
42*5-6	4800	114*5.7		4630	273*7		4760	457*9		508*10	4750
45*3	4900	114*6		4600	273*8		4750	457*20		530*10	4750
45*3. 5-4	4800	114*8		4600	273*8.5		4560	Ju Neng Mo Long		610*10	4850
45*5-6	4800	133*4		5000	273*9		4560	325*8		630*10	4850
48*3	4850	133*4. 5		4730	273*10		4560	325*9		720*10	5050
48*3. 5-4	4750	133*5		4660	325*8		4730	325*10	4580	820*10	5150
48*5-6	4750	133*6		4630	325*8.5		4640	325*11	4530	11mm or more
57*3	4950	133*4Big Seamless	5300		325*9		4610	325*12	4530	480	4750
57*3. 5	4700	27*2.7-3	6m	6800	325*10		4580	325*13	4530	508	4750
57*4	4700	32*3-4	6m	5550				325*14	4530	530	4750
57*5-6	4700	34*3.5	6m	5550	Shandong			325*15	4530	610	4850
60*3	4800	42*5	6m					325*16	4530	630	4850
60*3.5	4700	48*3. 5	6m	5000	194*6	5000				720	5050
60*4	4700	57*3. 5	6m	4950	219*6		4750			820	5150
60*5-6	4700	57*4	6m	4950
6m fixed length130 Middle disconnect100 Stock small tube 6m fixed length*300

Product Feature And Application

According to the production process, Longitudinally Welded Pipe can be divided into high frequency straight seam steel pipes and submerged arc welded straight seam steel pipes. Straight seam steel pipes are mainly used in water supply engineering, petrochemical industry, chemical industry, electric power industry, agricultural irrigation, and urban construction.

Used for liquid transportation: water supply and drainage.

For gas transportation: gas, steam, liquefied petroleum gas.

For structural purposes: as piling pipes, as bridges; pipes for wharves, roads, building structures, etc.