Material Grades
Stainless Steel Products
Super Large & Super Thick
ASTM A312 A358 A778 EN10217-7
Stainless Steel Industrial Pipe
- TP304/1.4301, TP304L/1.4307
- TP316/1.4401, TP316L/1.4404
- TP321/1.4541, 2205(S31803)/1.4462
- TP321, TP347, etc.
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- Production Standard:
- Material Grades:
- Tube Type:
- Size Range:
- Wall Thickness:
- Surface:
- Testing:
- Certification:
- Mill Test Certificate
- ASTM, ASME, EN, ISO, JIS
- 304/1.4301, 304L/1.4307, 316/1.4401, 316L/1.4404, 321/1.4541, 2205(S31803)/1.4462 etc.
- Seamless or Welded (TIG/PLASMA)
- 1/8" to 80", DN6-DN2000, 10.3-2032mm
- SCH5S – SCH80S
- Annealed & Pickled, Bead Blasted, Brushed Finish
- Hydrostatic Test, Pneumatic Test, Eddy Current Test (ECT), Ultrasonic Test (UT), X-ray Test
- TUV ISO 9001:2015, PED 2014/68/EU, AD 2000-W0.
- EN10204 3.1
| Standard | Common Grades | Key Features | ||
|---|---|---|---|---|
| ASTM (American Society for Testing and Materials) | ||||
| ASTM A312 | 304, 304L, 316, 316L, 321, 347 | Covers pipes for high-temperature and corrosive environments | ||
| ASTM A358 | 304H, 316H, 317L | Electric-fusion-welded with higher corrosion resistance | ||
| ASTM A790 | 2205 (S31803), 2507 (S32750) | High strength, excellent chloride resistance | ||
| ASTM A269 | 304, 316L | Often used in instrumentation and low-pressure systems | ||
| ASTM A999 | Applies to multiple grades | Specifies testing, tolerances, and certification | ||
| ASME (American Society of Mechanical Engineers) | ||||
| ASME B36.19 | All standard grades | Defines wall thickness (Schedule 5S to 80S) | ||
| ASME SA312 | 304, 316, etc. | Required for boilers, power plants, and high-pressure systems | ||
| EN (European Norm) | ||||
| EN 10216-5 | 1.4301 (304), 1.4404 (316L) | Used in EU for chemical and petrochemical industries | ||
| EN 10217-7 | 1.4307 (304L), 1.4404 (316L) | Covers TIG-welded and laser-welded pipes | ||
| ISO (International Organization for Standardization) | ||||
| ISO 1127 | All grades | Defines metric sizes and wall thickness | ||
| ISO 2037 | 304, 316 | Similar to ASTM A270 but with metric dimensions | ||
| JIS (Japanese Industrial Standards) | ||||
| JIS G3459 | SUS304, SUS316 | Used in Japanese industrial applications | ||
| JIS G3463 | SUS304H, SUS316L | High-temperature and pressure resistance | ||
ASTM A312 stainless steel pipe sizes and dimensions should conform to ANSI B36.19, nominal pipe size (NPS) ranges from NPS 1/8 [10.29 mm] to NPS 80 [2032 mm], Schedule number for wall thickness from Sch 5s to Sch 80s, more Pipe Schedule Sizes are specified for special applications, the value stated respectively for a specific size, average wall and minimum wall pipe are available.
| Nominal Size (Tube OD) | Wall Thickness, SCHEDULE | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| NPS(inch) | DN | mm | 5S | 10S | 40S | STD | 80S | |||
| 1∕8 | 6 | 10.3 | – | 1.24 | 1.73 | 1.73 | 2.41 | |||
| 1∕4 | 8 | 13.7 | – | 1.65 | 2.24 | 2.24 | 3.02 | |||
| 3∕8 | 10 | 17.2 | – | 1.65 | 2.31 | 2.31 | 3.2 | |||
| 1∕2 | 15 | 21.3 | 1.65 | 2.11 | 2.77 | 2.77 | 3.73 | |||
| 3∕4 | 20 | 26.7 | 1.65 | 2.11 | 2.87 | 2.87 | 3.91 | |||
| 1 | 25 | 33.4 | 1.65 | 2.77 | 3.38 | 3.38 | 4.55 | |||
| 1-1∕4 | 32 | 42.2 | 1.65 | 2.77 | 3.56 | 3.56 | 4.85 | |||
| 1-1∕2 | 40 | 48.3 | 1.65 | 2.77 | 3.68 | 3.68 | 5.08 | |||
| 2 | 50 | 60.3 | 1.65 | 2.77 | 3.91 | 3.91 | 5.54 | |||
| 2-1∕2 | 65 | 73 | 2.11 | 3.05 | 5.16 | 5.16 | 7.01 | |||
| 3 | 80 | 88.9 | 2.11 | 3.05 | 5.49 | 5.49 | 7.62 | |||
| 3-1∕2 | 90 | 101.6 | 2.11 | 3.05 | 5.74 | 5.74 | 8.08 | |||
| 4 | 100 | 114.3 | 2.11 | 3.05 | 6.02 | 6.02 | 8.56 | |||
| 5 | 125 | 141.3 | 2.77 | 3.4 | 6.55 | 6.55 | 9.53 | |||
| 6 | 150 | 168.3 | 2.77 | 3.4 | 7.11 | 7.11 | 10.97 | |||
| 8 | 200 | 219.1 | 2.77 | 3.76 | 8.18 | 8.18 | 12.7 | |||
| 10 | 250 | 273.1 | 3.4 | 4.19 | 9.27 | 9.27 | 12.7 | |||
| 12 | 300 | 323.9 | 3.96 | 4.57 | 9.53 | 9.53 | 12.7 | |||
| 14 | 350 | 355.6 | 3.96 | 4.78 | – | 9.53 | – | |||
| 16 | 400 | 406.4 | 4.19 | 4.78 | – | 9.53 | – | |||
| 18 | 450 | 457.2 | 4.19 | 4.78 | – | 9.53 | – | |||
| 20 | 500 | 508 | 4.78 | 5.54 | – | 9.53 | – | |||
| 22 | 550 | 558.8 | 4.78 | 5.54 | – | 9.53 | – | |||
| 24 | 600 | 609.6 | 5.54 | 6.35 | – | 9.53 | – | |||
| 26 | 650 | 660.4 | – | – | – | 9.53 | – | |||
| 28 | 700 | 711.2 | – | – | – | 9.53 | – | |||
| 30 | 750 | 762 | 6.35 | 7.92 | – | 9.53 | – | |||
| 32 | 800 | 812.8 | – | – | 17.48 | 9.53 | – | |||
| 34 | 850 | 863.6 | – | – | 17.48 | 9.53 | – | |||
| 36 | 900 | 914.4 | – | – | 19.05 | 9.53 | – | |||
| 38 | 950 | 965.2 | – | – | - | 9.53 | – | |||
| 40 | 1000 | 1016 | – | – | - | 9.53 | – | |||
Tolerance
| Standard | Outside Diameter(mm) | Thickness(mm) | Length(mm) | |
|---|---|---|---|---|
| ASTM A312 | ≤48.26 | -0.4 | unspecified -12.50% | Definite cut length +6.40 -0 |
| >48.26~114.30 | 0 | |||
| >114.30-219.08 | 0.8 | |||
| >219.08~457.20 | 1.6 | |||
| >457-660 | -4 | |||
| >660-864 | -5 | |||
| >864-1219 | -5.6 | |||
| EN 10217-7 | D1±1.50% with ±0.75mm(min) D2±1.00% with ±0.50mm(min) D3±1.75% with ±0.30mm(min) D4±0.50% with ±0.10mm(min) EN ISO 1127 | T1±15.00% with±0.60mm(min) T2±12. 5% with ±0.40mm(min) T3±10.00% with±0.20mm(min) T4±7.50% with ±0.15mm(min) T5±5.00% with ±0.10mm(min) EN ISO 1127 | ＜6000 +5.00 6000~12000 +10.00 |
|
Equivalent Grades
| Steel Name | Steel Number | AISI Grade |
|---|---|---|
| X2CrNi18-9 | 1.4307 | 304L |
| X5CrNi18-10 | 1.4301 | 304 |
| X2CrNiMo17-12-2 | 1.4404 | 316L |
| X6CrNiTi18-10 | 1.4541 | 321 |
| X6CrNiMoTi17-12-2 | 1.4571 | 316Ti |
| X2CrNiMo18-15-4 | 1.4438 | 317L |
| X2CrNiMoN22-5-3 | 1.4462 | 2205 |
EN 10217-7 refers to a standard in Europe that specifies technical delivery conditions for welded pipes made of non-alloy and alloy steel for high-temperature and high-pressure applications. This specification primarily concerns pipes intended for use in the manufacturing of boilers, pressure vessels, and heat exchangers.
EN 10217-7 Welded Pipe Specifications
| Standard | EN 10217-7 |
|---|---|
| Tube Type | Welded Tube |
| Grades | 1.4301, 1.4307, 1.4404, 1.4541, 1.4571, 1.4462 |
| Finishing | As Welded, Annealing Pickling, Bright Annealing, Polished |
| Outside Diameter | 6 Up To 1016 mm |
| Thickness | 0.5 Up To 20 mm |
EN 10217-7 Common Steel Grades And Equivalent AISI Grades
1, Oil & Gas Industry
Transportation of crude oil, natural gas, and refined products
Offshore platforms and pipelines (resistant to seawater corrosion)
Downhole tubing and casing in harsh environments
2, Chemical & Petrochemical Industry
Acid and chemical transport (resistant to corrosive substances)
Heat exchangers, reactors, and storage tanks
Highpressure and hightemperature applications
3, Food & Beverage Industry
Sanitary tubing for milk, beer, juice, and other liquids
Dairy processing and brewing equipment (easy to clean, nonreactive)
Conveying systems for food production
4, Pharmaceutical & Biotechnology
Highpurity piping for drug manufacturing
Sterile processing and cleanroom applications
Bioreactors and filtration systems
5, Water Treatment & Desalination
Seawater desalination plants (resistant to saltwater corrosion)
Wastewater treatment and distribution systems
Hydraulic and plumbing systems
6, Power Generation
Boiler tubes and steam pipelines in thermal power plants
Nuclear power plant cooling systems
Exhaust systems and heat recovery units
7, Automotive & Aerospace
Exhaust systems (e.g., manifolds, mufflers)
Hydraulic and fuel lines
Aircraft structural components and jet engine parts
8, Construction & Architecture
Structural frameworks and handrails
Underground piping for drainage and HVAC systems
Decorative applications (e.g., facades, bridges)
9, Pulp & Paper Industry
Chemical recovery systems
Bleaching and digesting equipment
Piping for corrosive pulp processing liquids
10, Mining & Mineral Processing
Slurry transport pipelines
Acid leaching systems
Dewatering and tailings management
Product Introduction
1. Our stainless steel tubes/pipes are treated by bright annealing, inside weld bead removing, precise polishing. The roughness of tubes could be under 0.3μm.
2. We have the non destructive testing ( NDT ), eg. online eddy current inspection and hydraulic or airtightness testing.
3. Thick welding, good appearance.The mechanical properties of tube could be tested.
4. The raw material is from Taigang, Baogang, Zhangpu and so on.
5. And Our tubes are certificated by AD 2000-W0, PED 2014/68/EU, ISO 9001 : 2015.
6. Full material traceability is guaranteed during the manufacturing process.
7. Polished tube is supplied in individual plastic sleeves with capped ends ensuring optimum cleanliness.
8. Internal Bore: Tubes have a smooth, clean and crevice free bore.
9. Market leading quality products.
| Material Grades | 200 Series | 201, 202 |
| 300 Series | 301, 304, 304L, 316, 316L, 316Ti, 317L, 321, 309s, 310s | |
| 400 Series | 409L ,410, 410s, 420j1, 420j2, 430, 444, 441, 436 | |
| Duplex Steel | 904L, 2205, 2507, 2101, 2520, 2304 | |
| Product Standards | Mechanical / Ornamental Pipe | ASTM A554, EN 10296-2 |
| Food Grade / Sanitary Pipe | ASTM A270, JIS G3447, KS D 3585, EN 10357(DIN 11850), AS 1528.1, ISO 2037(NF A49-249) | |
| Heat Exchanger Pipe | ASTM A249 / A269 ASME SA249, GB / T 24593-2009, HG 20537.2 | |
| Large Diameter Industrial Tube | ASTM A312 / A778 EN 10217-7, GB / T 12771-2008, HG 20537.3 | |
| Drinking water Pipe | EN-10312 / GB / T 19228 | |
| Production Size(can be customized) | Round Tube/Pipe | |
| Wall thickness | 0.5mm-20mm | |
| Outer diameter | 10mm-2000mm | |
| Square Tube/Pipe | ||
| Wall thickness | 0.5mm-20mm | |
| Outer diameter | 4mm*4mm-800mm*800mm | |
| Rectangular Tube/Pipe | ||
| Wall thickness | 0.5mm-20mm | |
| Outer diameter | 1mm-150mm | |
| Length | 4000mm, 5800mm, 6000mm, 12000mm, or as required. | |
| Application | Sanitary Pipe | for food processing industry, beverage industry, sugar mill and so on; |
| Heat Exchanger Pipe | condenser, boiler, super heater, evaporator and so on; | |
| Industiral Tube | for petroleum delivery, gas delivery, petrochemical industry, wastewater treatment, drainage system, and so on; | |
| Mechanical Pipe: | handrail, railings, balustrade, hence and so on. | |
ASTM A312 / ASTM A778 Specification
| Naminal Diameter | Outside Diameter | Nominal Wall Thickness | ||||
|---|---|---|---|---|---|---|
| DN | NPS | mm | SCH 5S (mm) | SCH 10S (mm) | SCH 20S (mm) | SCH 40S (mm) |
| 8 | 1/4" | 13.7 | 1.65 | 2.24 | ||
| 10 | 3/8" | 17.2 | 1.65 | 2.31 | ||
| 15 | 1/2" | 21.3 | 1.65 | 2.11 | 2.77 | |
| 20 | 3/4" | 26.7 | 1.65 | 2.11 | 2.87 | |
| 25 | 1" | 33.4 | 1.65 | 2.77 | 3.38 | |
| 32 | 1-1/4" | 42.2 | 1.65 | 2.77 | 3.56 | |
| 40 | 1-1/2" | 48.3 | 1.65 | 2.77 | 3.68 | |
| 50 | 2" | 60.3 | 1.65 | 2.77 | 3.91 | |
| 65 | 2-1/2" | 73 | 2.11 | 3.05 | 5.16 | |
| 80 | 3" | 88.9 | 2.11 | 3.05 | 5.49 | |
| 90 | 3-1/2" | 101.6 | 2.11 | 3.05 | 5.74 | |
| 100 | 4" | 114.3 | 2.11 | 3.05 | 6.02 | |
| 125 | 5" | 141.3 | 2.77 | 3.4 | 6.56 | |
| 150 | 6" | 168.3 | 2.77 | 3.4 | 7.11 | |
| 200 | 8" | 219.1 | 2.77 | 3.96 | 6.35 | 8.18 |
| 250 | 10" | 273.1 | 3.4 | 3.96 | 6.35 | 9.27 |
| 300 | 12" | 323.9 | 3.96 | 4.57 | 6.35 | 9.53 |
| 350 | 14" | 355.6 | 3.96 | 4.78 | 7.92 | 11.13 |
| 400 | 16" | 406.4 | 4.19 | 4.78 | 7.92 | 12.7 |
| 450 | 18" | 457.2 | 4.19 | 4.78 | 7.92 | 14.27 |
| 500 | 20" | 508.0 | 4.78 | 5.54 | 9.53 | 15.09 |
| 550 | 22" | 558.8 | 4.78 | 5.54 | 9.53 | 15.09 |
| 600 | 24" | 609.6 | 5.54 | 6.35 | 9.53 | 17.48 |
| 650 | 26" | 660.4 | 12.7 | 17.48 | ||
| 700 | 28" | 711.2 | 12.7 | 17.48 | ||
| 750 | 30" | 762.0 | 6.35 | 7.92 | 12.7 | 17.48 |
| 800 | 32" | 812.8 | 12.7 | 17.48 | ||
| 850 | 34" | 863.6 | 12.7 | 17.48 | ||
| 900 | 36" | 914.4 | 12.7 | 19.05 | ||
| 950 | 38" | 965.2 | ||||
| 1000 | 40" | 1016.0 | ||||
Dimension Tolerance Table
| Standard | Outside Diameter(mm) | Thickness(mm) | Length(mm) | |
|---|---|---|---|---|
| ASTM A312 | ≤48.26 | -0.4 | unspecified -12.50% | Definite cut length +6.40 -0 |
| >48.26~114.30 | 0 | |||
| >114.30-219.08 | 0.8 | |||
| >219.08~457.20 | 1.6 | |||
| >457-660 | -4 | |||
| >660-864 | -5 | |||
| >864-1219 | -5.6 | |||
| EN 10217-7 | D1±1.50% with ±0.75mm(min) D2±1.00% with ±0.50mm(min) D3±1.75% with ±0.30mm(min) D4±0.50% with ±0.10mm(min) EN ISO 1127 | T1±15.00% with±0.60mm(min) T2±12. 5% with ±0.40mm(min) T3±10.00% with±0.20mm(min) T4±7.50% with ±0.15mm(min) T5±5.00% with ±0.10mm(min) EN ISO 1127 | ＜6000 +5.00 6000~12000 +10.00 |
|
Applications
Large Diameter Industrial Stainless Steel Pipe
Large-diameter industrial stainless steel pipes are critical components in fluid conveying systems, designed to transport liquids, gases, or slurries in high-volume applications. These pipes are widely used in industries such as oil and gas, chemical processing, water treatment, power generation, and marine engineering. Their large diameter allows for efficient fluid transfer, while stainless steel provides excellent corrosion resistance, strength, and durability.
1. Material Grades:
- 304/304L Stainless Steel: General-purpose grade for mild corrosive environments.
- 316/316L Stainless Steel: Enhanced corrosion resistance, ideal for harsh environments (e.g., seawater, chemicals).
- Duplex Stainless Steel (e.g., 2205): High strength and excellent corrosion resistance, suitable for demanding applications.
- Super Duplex Stainless Steel (e.g., 2507): For extreme conditions, such as high chloride exposure.
2. Sizes and Dimensions:
- Diameter: Typically ranges from 6 inches (150 mm) to 120 inches (3000 mm) or larger.
- Wall Thickness: Varies based on pressure and application requirements (e.g., 5 mm to 50 mm).
- Length: Customizable, but standard lengths are 6 meters (20 feet) or longer.
3. Types of Pipes:
- Seamless Pipes: Ideal for high-pressure and high-temperature applications.
- Welded Pipes: Cost-effective and suitable for large-diameter applications with moderate pressure requirements.
- Longitudinal Welded or Spiral Welded: For large-diameter pipes, depending on the manufacturing process.
4. Surface Finish:
- Smooth surfaces to minimize friction and prevent fouling.
- Optional finishes include polished, pickled, or brushed for specific applications.
5. Standards and Certifications:
- ASTM A312: Standard specification for seamless, welded, and heavily cold-worked austenitic stainless steel pipes.
- ASTM A358: Standard for electric-fusion-welded austenitic stainless steel pipes for high-temperature service.
- API 5L: For pipelines in the oil and gas industry.
- ASME B36.19M: Covers stainless steel pipe dimensions.
6. Advantages
- Corrosion Resistance: Performs well in corrosive environments, including exposure to acids, alkalis, and seawater.
- High Strength: Capable of withstanding high pressure and mechanical stress.
- Durability: Long service life with minimal maintenance.
- Hygienic: Suitable for food, beverage, and pharmaceutical industries.
- Versatility: Can be used for a wide range of fluids, including water, oil, gas, and chemicals.
7. Applications
- Oil and Gas Industry:
– Transporting crude oil, natural gas, and refined products.
– Offshore and onshore pipelines. - Water Treatment and Distribution:
– Conveying potable water, wastewater, and desalinated water. - Chemical Processing:
– Handling corrosive chemicals, acids, and alkalis. - Power Generation:
– Cooling water systems, steam pipelines, and exhaust systems. - Marine Engineering:
– Seawater pipelines, ballast systems, and shipbuilding. - Mining and Mineral Processing:
– Slurry transportation and tailings disposal. - Food and Beverage Industry:
– Transporting liquids like milk, beer, and juices in hygienic conditions.
8. Selection Criteria for Large-Diameter Pipes
- Fluid Type: Choose a material grade compatible with the fluid being conveyed (e.g., 316L for seawater).
- Operating Pressure and Temperature: Ensure the pipe can withstand the system’s conditions.
- Environmental Conditions: Consider factors like corrosion, abrasion, and external stresses.
- Cost: Balance performance requirements with budget constraints.
- Standards Compliance: Ensure pipes meet industry standards (e.g., ASTM, API, ASME).
9. Installation and Maintenance
- Installation: Use proper welding techniques (e.g., TIG or MIG welding) and fittings to ensure leak-proof connections.
- Support: Provide adequate support to prevent sagging or stress on the pipeline.
- Inspection: Regularly inspect for corrosion, leaks, or damage.
- Cleaning: Use pigging systems or chemical cleaning to remove deposits and maintain flow efficiency.
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