Double Submerged Arc Welded steel pipe

Double Submerged Arc Welded (DSAW) steel pipe is available in straight and spiral welded formats and used in a variety of applications. The submerged welding process protects the steel from contamination of impurities in the air. Both inside and outside welds are performed.

DSAW pipe can be specified in very large diameter and to exact inside or outside dimensions. Spiral Welded steel pipe is distinguished by the manufacturing process that results in a spiral DSAW seam the length of the pipe to lengths of 155 feet. 

The manufacturing of Double Submerged Arc Welded Pipe involves first forming steel plates into cylindrical shapes. Then the edges of the rolled plate are formed so that V-shaped grooves are formed on the interior and exterior surfaces at the location of the seam. The pipe seam would then be welded by a single pass of an arc welder on the interior and exterior surfaces. The welding arc is submerged under flux. What can be known as an advantage of this process is that welds would penetrate 100% of the pipe wall and produce a very strong bond of the pipe.

Full Supply Ltd have been supplying EFW Electric Fusion Welded Pipe for many years. We supply DSAW Pipe to the folowing industries on a global scale:

• Oil Industry
• Gas Industry
• Filtration Industry
• Refrigeration Industry
• Refining Industry
• Petrochemical Industry
• Offshore Industry

Large Diameter DSAW, Spiral Welded / Helical

• Grades:
  • API 5L, Gr B, X42 to X70
  • ASTM A252 Gr.2, Gr. 3
• Outside Diameter: 12” to 160”
• Wall Thickness: 0.250" to 1.00"
• Length: Maximum 60 feet (we can supply specific lengths)
• End Finish: Bevel End, Special Bevel End, Square Cut
• Special Requirement: For any specific job we can provide welded lugs, brackets as per the drawings or your needs.

DSAW pipe

Double Submerged Arc Welded (DSAW) steel pipe is available in straight and spiral welded formats and used in a variety of applications. The submerged welding process protects the steel from contamination of impurities in the air. Both inside and outside welds are performed.

DSAW pipe can be specified in very large diameter and to exact inside or outside dimensions. Spiral Welded steel pipe is distinguished by the manufacturing process that results in a spiral DSAW seam the length of the pipe to lengths of 155 feet. 

The manufacturing of Double Submerged Arc Welded Pipe involves first forming steel plates into cylindrical shapes. Then the edges of the rolled plate are formed so that V-shaped grooves are formed on the interior and exterior surfaces at the location of the seam. The pipe seam would then be welded by a single pass of an arc welder on the interior and exterior surfaces. The welding arc is submerged under flux. What can be known as an advantage of this process is that welds would penetrate 100% of the pipe wall and produce a very strong bond of the pipe.

Full Supply Ltd have been supplying EFW Electric Fusion Welded Pipe for many years. We supply DSAW Pipe to the folowing industries on a global scale:

• Oil Industry
• Gas Industry
• Filtration Industry
• Refrigeration Industry
• Refining Industry
• Petrochemical Industry
• Offshore Industry

Large Diameter DSAW, Spiral Welded / Helical

• Grades:
  • API 5L, Gr B, X42 to X70
  • ASTM A252 Gr.2, Gr. 3
• Outside Diameter: 12” to 160”
• Wall Thickness: 0.250" to 1.00"
• Length: Maximum 60 feet (we can supply specific lengths)
• End Finish: Bevel End, Special Bevel End, Square Cut
• Special Requirement: For any specific job we can provide welded lugs, brackets as per the drawings or your needs.

JCOE pipes

The mill adopts continuous axis contorting J-C-O(J-ing, C-ing and O-ing)process with characteristics of high forming accuracy and efficiency as well as balanced distribution of forming stress.

JCOE manufacturing technology is developed in the 1990s as a pipe forming process, the process of molding process is the first major steel mill edge (or planing) after pre-bending by longitudinal side, and then type → J-→ C O-order molding, stamping each step are the basic principles of three-point bending. Because it is a progressive multi-pass pressing, it must address the following questions: how to determine the die shape, the upper die and lower die stroke distance, and how much press pass in order to ensure the most appropriate bend radius and the best opening round hair tube.

But these issues with the steel plate, steel plants of different mechanical properties of concrete, pipe size (diameter and wall thickness), which in turn is very complex. Currently mainly by "trial and error", that is, whenever replacement or new steel specifications, we take a certain number of sample pressure test, worked out the right amount of punch. Trial and error method is more reliable, but the efficiency is relatively low.

Specifications 

• Throughput: 300,000 MT
• Outside Diameter :Φ406-Φ1829mm (16"-72")
• Wall Thickness :6.0-25.4mm (1/4"-1")
• Ouality Standards :API, BS, ASTM , JIS, DIN, GB , ISO, DNV
• Length :3-12.2m (10'-40')
• Grades :GB/T9711 L190-L555(API 5L A-X80)

JCOE Pipe Manufacturing Process

This is the first large diameter longitudinal submerged arc welded (LSAW) pipe production line in China .The mill adopts continuous axis contorting J-C-O(J-ing, C-ing and O-ing)process with characteristics of high forming accuracy and efficiency as well as balanced distribution of forming stress. The mill has the advantages of wide specifications and can produce pipes in any size within its production range.

We are able to provide customers with quality products and perfect service.
If you want to know more information, please kind to visit our website. 

UOE pipes

UOE is a method used for production of longitudinally welded large diameter pipes. Longitudinal edges of steel plates are first beveled using carbide milling equipment. Beveled plates are then formed into a U shape using a U-press and subsequently into an O shape using an O-press.

Specifications

• Throughput: 400,000 MT
• Outside Diameter :Φ508-Φ1118mm (20"-44")
• Wall Thickness :6.4-25.4mm (1/4"-1")
• Ouality Standards : API, BS, ASTM , JIS, DIN, GB , ISO, DNV
• Length : 9-12.2m (30'-40')
• Grades : GB/T9711 L190-L555 (API 5L A-X80)

UOE Pipe Manufacturing Process Demo

The UOE mill is the best suitable process to meet customers' requirements by virture of the characteristic of high production efficiency, stable product quality and various accessories for manufacturing and inspection.

UOE Pipe Manufacturing Process

We are able to provide customers with quality products and perfect service.
If you want to know more information, please kind to visit our website.

LSAW steel pipe

LSAW (Longitudinally Submerged Arc Welded Steel pipes) in leaflets plate as raw material, the steel plate in the mold or molding machine pressure (volume) into using double-sided submerged arc welding and flaring from production.

LSAW Steel Pipe For Oil & Gas pipeline
Material: As per API 5L, the steel grade covers X80 and lower,
Size Range:

• Dimension: Outer diameter: Ф406-1524mm
• Wall thickness: 6-40mm
• Unit length: 8-12.1m

LSAW Steel Pipe For Construction

• Size range: Outer diameter: Ф350-1600mm
• Wall thickness: 6-60mm
• Unit length: 6-12m

Roller Pipe

• Size range: Outer diameter: Ф1200-3800mm
• Wall thickness: 12-120mm
• Unit length (max) 3.2m

Thick Walled Large Diameter LSAW Pipe

Our mills has introduced advanced U.S. Lincoln automatic welding devices, and the international production of West German high-end quality JCOE molding technology, professional production of large diameter thick wall straight seam double submerged arc welding production line 4, the advanced German steel production equipment, with high technology, advanced technology and so on, straight seam steel several participating countries and the fluid transmission of major structural engineering projects, the company has become the designated use of structural steel enterprises, low pressure fluid supply pipe unit.

Size: OD :351-1050mm, thickness :8-30mm

material: 20 #, 16Mn, Q235B, Q345B, X42, X52, alloy steel, stainless steel.

Longitudinally Submerged Arc Welded carbon steel pipes
(LSAW Pipes)with JCOE forming mode

Roller Pipes Process Flow

Range of roller pipes: Outer diameter: Ф1200-3800mm  |  Wall thickness: 12-120mm  |  Unit length (max) 3.2m.

EFW pipes

EFW is Electric Fusion Welding, a welding process without filler.

The EFW pipe division consists of a JCO forming press, helical / spiral mill, inside and outside welding system, heat treatment furnace and testing facilities.

The EFW pipe divison consists of a JCO forming press, helical / spiral mill, inside and outside welding system, heat treatment furnace and testing facilities. Welding process employed is gtaw for root-pass and saw/tig for final pass with suitable filler wires as prescribed by aws specifications and asme boiler and pressure vessel code, section-ix. These facilities are capable of manufacturing austenitic and various duplex grades.

Sunny Steel has been supplying EFW Electric Fusion Welded Pipe for many years. We supply EFW Electric Fusion Welded Pipe to the folowing industries on a global scale:

• Oil Industry
• Gas Industry
• Filtration Industry
• Refrigeration Industry
• Refining Industry
• Petrochemical Industry
• Offshore Industry

Electric Fusion Welded Pipe

EFW is Electric Fusion Welding, a welding process without filler.

The EFW pipe division consists of a JCO forming press, helical / spiral mill, inside and outside welding system, heat treatment furnace and testing facilities.

The EFW pipe divison consists of a JCO forming press, helical / spiral mill, inside and outside welding system, heat treatment furnace and testing facilities. Welding process employed is gtaw for root-pass and saw/tig for final pass with suitable filler wires as prescribed by aws specifications and asme boiler and pressure vessel code, section-ix. These facilities are capable of manufacturing austenitic and various duplex grades.

Sunny Steel has been supplying EFW Electric Fusion Welded Pipe for many years. We supply EFW Electric Fusion Welded Pipe to the folowing industries on a global scale:

• Oil Industry
• Gas Industry
• Filtration Industry
• Refrigeration Industry
• Refining Industry
• Petrochemical Industry
• Offshore Industry

High frequency welding pipe

In High Frequency Welded (HFW) pipe production process, hot rolled steel coils are fed with a high capacity accumulator in order to achieve continuous welding.

HIGH-FREQUENCY WELDING is a welding process in which the heat source used to melt the joining surfaces is obtained from high-frequency (HF) alternating current (ac) resistance heating.
Coil edges are milled using carbide cutters in order to assure a high quality weld. Coils are then formed by cold forming method using a set of cage rolls and fin passes, and then joined using high frequency currents using induction or alternatively conduction methods.

Expertise

Using its specialist expertise in high frequency welding, TWI has supported industry with a range of project and consultancy work which has included:

• mechanical properties of welded pipe
• metallurgical studies on welds
• defect examination
• optimisation studies on HF butt welding of tailored blanks

Resource:

• testing facilities for fracture mechanics studies
• corrosion & metallurgical test equipment
• non-destructive testing
• process advice & troubleshooting
• tailored training courses

Application Areas

HFW welded steel pipes are widely preferred in Oil, Natural Gas, Water and other liquids transportation and distribution lines, heating, cooling, ventilation piping and steel structures for construction and other general purposes by means of precise production tolerances and high capacity manufacturing method.

All SSE's Pipes and fittings are conducted to ISO 9001 quality standard
 Why not search the site for more information on high frequency welding (ERW)
 Want to discuss high frequency welding (ERW)? 
 If you work for an Industrial Member of SSE look in Who Knows to find the expert.
 Mail to: sales@sunnysteel.com , If you want to get more information.

HFI pipe

In High Frequency Welded (HFW) pipe production process, hot rolled steel coils are fed with a high capacity accumulator in order to achieve continuous welding.

HIGH-FREQUENCY WELDING is a welding process in which the heat source used to melt the joining surfaces is obtained from high-frequency (HF) alternating current (ac) resistance heating.
Coil edges are milled using carbide cutters in order to assure a high quality weld. Coils are then formed by cold forming method using a set of cage rolls and fin passes, and then joined using high frequency currents using induction or alternatively conduction methods.

Expertise

Using its specialist expertise in high frequency welding, TWI has supported industry with a range of project and consultancy work which has included:

• mechanical properties of welded pipe
• metallurgical studies on welds
• defect examination
• optimisation studies on HF butt welding of tailored blanks

Resource:

• testing facilities for fracture mechanics studies
• corrosion & metallurgical test equipment
• non-destructive testing
• process advice & troubleshooting
• tailored training courses

Application Areas

HFW welded steel pipes are widely preferred in Oil, Natural Gas, Water and other liquids transportation and distribution lines, heating, cooling, ventilation piping and steel structures for construction and other general purposes by means of precise production tolerances and high capacity manufacturing method.

All SSE's Pipes and fittings are conducted to ISO 9001 quality standard
 Why not search the site for more information on high frequency welding (ERW)
 Want to discuss high frequency welding (ERW)? 
 If you work for an Industrial Member of SSE look in Who Knows to find the expert.
 Mail to: sales@sunnysteel.com , If you want to get more information.

Stainless steel oval pipe

Stainless steel oval pipe. Stainless steel oval tube offered in grades 304 and 316 in a wide choice of sizes. All to order, with a large range on the shelf.

Specifications of Stainless Steel Oval Pipes:

1. Process method: Cold drawn/welded
2. Material: 304/L/H, 316/L/H/TI, 321/H, 347/H, 317/LM/LMN, 309S/H, 310S/H,SAF2205,etc
3. Standard:CNS 5802, JIS G3446 and ASTM A554 EN,etc
4. Finish Condition: Pickled, annealed, polished
5. Application: construction, upholstery instrument,etc
6. Packing: As required

Packaging of Stainless Steel Tubes/Pipes

Please don’t worry that our products are packed, stored, transported according to the international regulation. We do care about the quality of our products; even some little details are paid attention to.
We wrap the stainless steel products with anti-rust paper and steel rings to prevent damage. Identification labels are tagged according to standard specification or customer's instructions. Special packing is available as per customer's requirement.
Plus, our storage racks are made of wood. Other kinds of metals are settled in other places, far from the stainless steel. Any unwanted chemical reaction can be prevented.

Dimensions of Oval/Elliptical Pipe：

Oval/Elliptical Pipe
Dimensions	Wall Thickness
23.5mm x 13.5mm	1.5mm
30.5mm x 17.5mm	1.5mm
39.5mm x 20.5mm	1.5mm
47mm x 25mm	1.5mm
61mm x 37mm	1.5mm
61mm x 37mm	2mm
61mm x 37mm	3mm
71mm x 45mm	2.5mm sateen finish
76mm x 50mm	2.0mm
90mm x 60mm	1.5mm
90mm x 60mm	2mm
90mm x 60mm	3mm
121mm x 76mm	2mm
121mm x 76mm	3mm
128mm x 70mm	2mm
128mm x 70mm	3mm

Flat Oval Pipe

Flat Oval Pipe
Dimensions	Wall Thickness
23mm x 12mm	1.5mm
27mm x 14mm	1.5mm
31mm x 15mm	1.5mm
39mm x 19mm	1.5mm
48mm x 21mm	1.5mm
62mm x 31mm	1.5mm