ASTM A358 Grade TP 304 CL2 Stainless Steel Pipe
1. Standard: ASTM A358
2. Grade: TP304/304L/304H, 309S/310S, 316/316L, 317/317L, 321/321H, 347/347H
3. Pipe Class: Class 1, 2, 3, 4, 5
4. Product Type: Electric Fusion Welded Stainless Steel Pipe(EFW)
5. OD: 114.3 mm – 2500 mm
6. Wall Thickness: As specified
7. Application:Designed for pressure service in high-temperature and corrosive environments, widely used in oil & gas, chemical, petrochemical, power generation and industrial piping systems.
8. Certification: ISO 9001, PED,TUV, ISO 17025
9. Test: 100% UT/RT
10. Available documents: MTC/MTR (3.1/3.2), TPI, WPS/PQR, MPS, UT/RT report
Description
ASTM A358 Grade TP 304 CL2 Stainless Steel Pipe – High-Integrity Welded Pipe for Critical Industrial Applications
When your venture requests solid execution beneath tall weight and destructive conditions, ASTM A358 Grade TP 304 CL2 Stainless Steel Pipe from YOUFASS conveys the keenness you require. Our Class 2 electric combination welded channels highlight double-sided welding with 100% radiographic testing, guaranteeing predominant auxiliary quality. With 15 generation lines competent of 50,000 tons yearly and conveyance as quick as 7 days to Tianjin Port, we back your timeline. Sponsored by ISO 9001, PED, and TÜV certifications, our pipes meet exacting quality guidelines for oil & gas, chemical preparing, control era, and mechanical channeling frameworks. All items come with full traceability documentation counting MTC 3.1/3.2 and total test reports.
What Makes ASTM A358 CL2 Pipes Different?
Class 2 pipes aren't your standard welded arrangement. They're built for applications where disappointment isn't an option.
The characterizing highlight? Double-welded creases. Each ASTM A358 Grade TP 304 CL2 Stainless Steel Pipe receives welding on both insides and outside surfaces, at that point experiences total radiographic or ultrasonic testing. This fabricating approach dispenses with potential powerless focuses that single-weld pipes may have.
You get a pipe that handles raised weights and temperatures without compromise. That's why engineers indicate Class 2 for weight vessels, petrochemical lines, and control plant systems.
Technical Specifications at a Glance
| Parameter | Specification |
|---|---|
| Standard | ASTM A358 |
| Grade | TP304/304L/304H, 309S/310S, 316/316L, 317/317L, 321/321H, 347/347H |
| Pipe Class | Class 1, 2, 3, 4, 5 |
| Manufacturing Process | Electric Fusion Welded (EFW) |
| Outside Diameter (OD) | 114.3 mm – 2500 mm |
| Wall Thickness (WT) | 3 mm – 50 mm |
| Length | Random length or fixed length per your requirement |
| Surface Finish | Pickled & Annealed / Solution Annealed |
| End Finish | Plain end or Beveled end |
| Testing | 100% RT/UT, Hydrostatic test, Mechanical & Chemical analysis |
| Packaging | Wooden boxes with optional steel frame, hexagonal binding + woven bags |
Where You'll Use ASTM A358 Grade TP 304 CL2 Stainless Steel Pipe
The ASTM A358 Grade TP 304 CL2 Stainless Steel Pipe serve basic parts over numerous industries:
Oil & Gas: High-pressure transmission lines where spill anticipation is paramount
Chemical Preparing: Dealing with destructive liquids at raised temperatures
Power Era: Evaporator bolster lines and steam dissemination systems
Petrochemical Plants: Handle channeling for refining operations
Pressure Vessels: Shell and tube development requiring welded pipe with confirmed integrity
Industrial Liquid Frameworks: Any application where your prepare requests both quality and erosion resistance
Your system's unwavering quality begins with component quality. Class 2 pipes deliver you the certainty that comes from exhaustive testing and demonstrated fabricating standards.






Quality Assurance You Can Verify
At YOUFASS, quality isn't a promise—it's a reported process.
Every pipe begins with traceable crude materials from recognized steel sources. Our generation takes after strict handle controls at each arrange. Some time recently shipping, each pipe experiences comprehensive testing:
- 100% radiographic or ultrasonic examination
- Hydrostatic weight testing
- Mechanical property verification
- Chemical composition analysis
You get total documentation with each arrange. Material test certificates (MTC 3.1/3.2), third-party inspection reports (TPI), welding procedure specifications (WPS/PQR), and full test reports give the traceability your extend requires.
Our ISO 17025-accredited research facility and PED certification illustrate our commitment to worldwide benchmarks. When determinations matter, documentation demonstrates compliance.






Standards and Certifications:
- ISO 9001 Quality Management
- PED (Pressure Equipment Directive)
- TÜV certification.

Production Capability That Supports Your Schedule
Scale things when you're overseeing venture timelines.
With 15 committed generation lines and 200+ experienced group individuals, we handle orders from single channels (MOQ: 1 piece) to large-scale venture supplies. Our 50,000-ton yearly capacity implies we're prepared for your volume requirements.
Standard conveyance comes to Tianjin Port in as small as 7 days for pressing ventures. For complex determinations or extraordinary necessities, our specialized group gives bolster through plan, generation, and commissioning phases.
We're organized to serve worldwide accomplices, wholesalers, and venture temporary workers who require reliable quality with responsive service.








Clients' approval & trust

Frequently Asked Questions
Q:What is ASTM A358 TP304 CL2 pipe?
A:The product is an electric fusion welded pipe with double-sided welding. The "CL2" designation means Class 2, which requires radiographic examination of all welds. This construction method delivers higher structural integrity than single-welded alternatives, making it suitable for critical pressure applications.
Q:How is CL2 different from CL1?
A:Class 2 pipes feature welds on both interior and exterior surfaces, with mandatory radiographic or ultrasonic testing. Class 1 pipes have single-sided welds without required nondestructive examination. The additional welding and testing in CL2 provide superior strength and reliability for demanding applications. You pay more for CL2, but you get verified quality.
Q:Where are CL2 pipes used?
A:You'll find them in applications where failure has serious consequences: pressure vessels, petrochemical process lines, power plant systems, and high-pressure industrial piping. Any project requiring documented weld integrity and proven strength typically specifies Class 2 construction. Industries like oil & gas, chemical processing, and power generation rely on these pipes for critical infrastructure.
Ready to Specify Quality?
Contact our technical team at info@youfass.com to discuss your project requirements for ASTM A358 Grade TP 304 CL2 Stainless Steel Pipe and receive detailed specifications.
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