Wuxi Zhongxin Special Steel Co.，Ltd
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Stainless Steel Efw Welded Pipe is a type of stainless steel pipes that is produced through electric fusion welding. The electric fusion welding is a process in which high voltage electricity is passed onto the material to heat and melt it. The Stainless Steel EFW Pipe Manufacturers produce these pipes so that other welding materials are not necessary to make the pipes through welding. And since the electric fusion welding does not involve other materials, the Efw SS Pipe can usually be manufactured from 6 inches up to 100 inches in diameter. There are different grades of stainless steel material that can produce pipes in this method.
SS EFW Pipe Material Specification
| ASME and ASTM designation | ASTM A312 / ASTM SA312 |
| ASME / ANSI Standard | ANSI/ASME B36.19M, ANSI/ASME B36.10M |
| Available Grades |
|
| Available Forms and Types | Hydraulic, Square, Round, Hex, Rectangle, Honed |
| Manufacturing Type | Welded, 100% X Ray Welded, Fabricated, ERW, CDW |
| Pipe End Type Abbreviations | Beveled end, Bevel large end, Bevel both ends, Plain One End, Plain Both Ends, Bevel one end, Bevel small end, Treaded On End, Treaded Both Ends, Beveled One End |
| Types of Technical Delivery Conditions | Cold Drawn, Annealed and Pickled, Bright Annealed, Polished |
| Surface Finish and Coating | 2B, No.4, No.1, No.8 Mirror Finish or custom Finish as per customer Requirements |
| Schedule (SCH) | SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS |
| Offering value-added services | Grooving, Export Packaging, Material testing, Polishing, Export Documentation, Threading, Machining, Ultrasonic Testing, Customer Tagging/ Marking, Non Destructive, Threading, Beveling, MTR’s Available, Cutting, Destructive, Color Coding |
| ERW full form | Electric resistance welding (ERW), View Stainless Steel ERW Pipe for detailed information |
| EFW full form | Electric Fusion Welding (EFW) |
| Specification of ERW & EFW | ASME 36.10, ASME 36.19, ASME B16.25, ASME B16.49 |
| ERW & EFW Advantage | Custom size, Greater strength, Greater pressure resistant |
| ERW & EFW Disadvantage |
|
other Stainless steel Tubing Dimension ranges :
| Product Name | Executive Standard | Dimension | Steel Code / Steel Grade |
| Industrial Pipes | ASTM A312, A358, A778, JIS G3459 | OD: 1/4"~40" | TP304, TP304L, TP316L, SUS304TP |
| WT: SCH5S~SCH80S | |||
| Tubes for Boiler and Heat-Exchanger, General Service Tubing | ASTM A249, A269, JIS G3463 | OD: 15.9~139.8mm | TP304, TP304L, TP316L, SUS304TB |
| WT: 1.6~5.0mm | |||
| Mechanical and Structural Tubes | ASTM A554, JIS G3446 | OD: 7.9~152.4mm | MT304, MT304L, MT316L, MT430 Grade 201, 202 as per mill's STD SUS304 |
| WT: 0.5~6.5mm | |||
| Square Tubes | ASTM A554 | OD: 12.7x12.7~150x150mm | MT304, MT304L, MT316L, MT430 Grade 201, 202 as per mill's STD |
| WT: 0.7~6.5mm | |||
| Rectangular Tubes | ASTM A554 | OD: 10x20~100x200mm | MT304, MT304L, MT316L, MT430 Grade 201, 202 as per mill's STD |
| WT: 0.7~6.5mm | |||
| Sanitary Tubing | ASTM A270 | OD: 25.4~165.2mm | TP304, TP304L, TP316L, SUS304TBS |
| JIS G3447 | WT: 0.8~3.05mm | ||
| Large Gauge Pipes for Ordinary Piping | JIS G3448 | OD: 15.88~318.5mm | SUS304TPD |
| WT: 0.8~3.0mm | |||
| Large Diameter Pipes | JIS G3468 | OD: 14"~40" | SUS304TPY |
| WT: SCH5S~SCH40S |
317L Stainless Steel mechanical properties & chemical composition
317L Stainless Steel Tube Chemical Composition
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 317 | min. | – | – | – | – | – | 18.0 | 3.0-4.0 | 11.0 | – |
| max. | 0.08 | 2.0 | 1.0 | 0.040 | 0.030 | 20.0 | 14.0 | – | ||
| 317L | min. | – | – | – | – | – | 18.0 | 3.0-4.0 | 11.0 | – |
| max. | 0.08 | 2.0 | 1.0 | 0.040 | 0.030 | 20.0 | 15.0 | – | ||
Stainless Steel 317L Tubes Mechanical Properties
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 317 | 515 | 205 | 35 | 75 | 205 |
| 317L | 515 | 205 | 35 | 75 | 205 |
Stainless Steel 317L Tube Physical Properties
| Grade | Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (m/m/0C) | Thermal Conductivity (W/m.K) | Specific Heat 0-1000C (J/kg.K) | Electrical Resistivity (n.m) | |||
| 0-1000C | 0-3150C | 0-5380C | at 1000C | at 5000C | |||||
| 317 | 8000 | 193 | 15.9 | 16.2 | 17.0 | 14.2 | 18.7 | 500 | 740 |
| 317L | 8000 | 193 | 15.9 | 16.2 | 17.0 | 14.2 | 18.7 | 500 | 740 |
Equivalent Grades for 317L Stainless Steel Tubes
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN |
| SS 317 | 1.4449 | S31700 | SUS 317 | – | – | – | – |
| SS 317L | 1.4438 | S31703 | SUS 317L | – | – | – | X2CrNiMo18-15-4 |
| Surface Finish | Internal Surface(ID) | Exterbal Surface(OD) | |||
| Roughness Average(RA) | Roughness Average(RA) | ||||
| μ inch | μm | μ inch | μm | ||
| AP | Annealed & Pickled | Not defined | Not defined | 40 or Not defined | 1.0 or Not defined |
| BA | Beight Annealed | 40,32,25,20 | 1.0,0.8,0.6,0.5 | 32 | 0.8 |
| MP | Mechanical Polish | 40,32,25,20 | 1.0,0.8,0.6,0.5 | 32 | 0.8 |
| EP | Electro Polish | 15,10,7,5 | 0.38,0.25,0.20;0.13 | 32 | 0.8 |
FAQ
Q: Would you provide samples For free?
A: Yes . with on stock specification We provide samples For Free . Freight charge collect
Q: What information should i provide to source for the right products ?
A: Material grade, width, thickness, coating and Purchase quantity , Expected lead time ,etc
Q: What are the shipping ports?
A: Under normal circumstances, we ship from Shanghai, Tianjin, Qingdao, Ningbo ports, you can choose other ports according to your needs.
Q: About product prices?
A: Prices vary from period to period due to cyclical changes in the price of raw materials.
Q: How long does your delivery time take?
A: In general, our delivery time is within 5-45 days, and may be delayed if the demand is extremely large or special circumstances occur.
Q: Can I visit your location?
A: Of course, we welcome customers from all over the world to visit our factory. However, some of the plants are not open to the public.
Q: Does the product have quality inspection before loading?
A: Of course, all our products are strictly tested for quality before packaging, and unqualified products will be destroyed.
Q: How to pack the products?
A: The inner layer has a waterproof paper outer layer with iron packaging and is fixed with a fumigation wooden pallet. It can effectively protect products from corrosion during ocean transportation.
Q: What is your working time?
A: In general, our online service time is Beijing time: 8:00-22:00, after 22:00, we will reply to your inquiry during the next working day.
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