ASTM A668 TP304 TP304L U-Tube
1. Grade: TP304 / TP304L, TP316 / TP316L
2. Standard: ASTM A688
3. Manufacturing Process: Seamless & Welded
4. OD: 12.7 mm – 114.3 mm
5. Wall Thickness: 0.5 mm – 5 mm
6. Delivery Condition: Solution annealed
7. Certification: ISO9001, PED, ISO 17025 lab, TÜV certified manufacturer
Core Functions and Application:
Applied in condensers and heat exchangers requiring enhanced inspection and reliable performance.
Description
ASTM A668 TP304 TP304L U-Tube – High-Performance Heat Exchanger Tubing
When your venture requests solid warm execution and erosion resistance, ASTM A668 TP304 TP304L U-Tube conveys precisely what you require. YOUFASS makes precision-engineered U-tubes particularly planned for condensers, warm exchangers, and kettle applications where upgraded assessment and long-term toughness matter most. With 15 generation lines and an yearly capacity of 50,000 tons, we supply U-tubes in breadths extending from 12.7 mm to 114.3 mm, divider thicknesses between 0.5 mm and 5 mm, all arrangement tempered and sponsored by ISO9001, PED, and TÜV certifications.
What Makes Our Stainless Steel U-Tubes Different
You're not fair buying tubing. You're contributing in a warm exchange arrangement built for performance.
Our ASTM A668 TP304 TP304L U-Tube is fabricated to handle warm extension normally. The U-shape decreases push on tube sheets amid temperature cycling. This implies less spills, less downtime, and longer benefit life for your equipment.
We utilize premium TP304 and TP304L stainless steel grades. Both offer amazing erosion resistance in water, steam, and mellow chemical situations. The TP304L variation gives indeed superior weld zone execution much appreciated to its lower carbon content.
Every tube goes through arrangement toughening. This warm treatment improves ductility and guarantees your tubes can withstand twisting push without cracking.
Technical Parameters
| Specification | Details |
|---|---|
| Grade | TP304 / TP304L / TP316 / TP316L |
| Standard | ASTM A668 |
| Outside Diameter (OD) | 12.7 mm – 114.3 mm |
| Wall Thickness (WT) | 0.5 mm – 5 mm |
| Manufacturing Process | Welded & Seamless |
| Heat Treatment | Solution Annealed |
| Length | Random length / Fixed length / U-bent |
| Packaging | Wooden box (optional steel frame), hexagonal binding + woven bag |
| Certification | ISO9001, PED, ISO 17025 lab, TÜV |
| Available Documents | MTC/MTR (3.1/3.2), TPI, WPS/PQR, MPS, UT/RT report |
Where You'll Use The ASTM A668 TP304 TP304L U-Tube
Our ASTM A668 TP304 TP304L U-Tube items serve requesting industries:
- Heat exchangers and condensers – particularly in control plants and HVAC systems
- Boiler tubing – for steam era and warm transfer
- Petrochemical handling – where erosion and temperature resistance are critical
- Water treatment offices – dealing with forceful water chemistry
- Food and refreshment preparing – assembly cleanliness and security standards
You advantage from tubes that stand up to scaling, setting, and push erosion breaking indeed in chloride-rich environments.






Why Work With YOUFASS
Proven Manufacturing Strength
We work 15 progressed generation lines. Our 200+ group individuals center on quality at each arrange. We're recognized among China's Top 500 enterprises.
Quality You Can Verify
Every shipment incorporates full traceability documentation. You get MTC/MTR certificates, third-party review reports, and welding method records when needed.
Flexible Orders
Need fair one pipe for testing? Our MOQ is 1 piece. Arranging a large-scale extend? We convey up to 50,000 tons annually.
Fast Turnaround
Standard orders dispatch inside 7 days to Tianjin Port. We get it extend timelines matter.
Complete Testing Capability
Our ISO 17025-accredited lab performs ultrasonic testing, radiographic testing, and dimensional confirmation in-house. No holding up for outside labs.

Flexible requesting, quick delivery:
Need a test? Arrange fair one pipe. Arranging a major venture? We'll facilitate end-to-end supply. With quickest conveyance in 7 days to Tianjin Harbour, your plan remains on track.








Clients' approval & trust

Frequently Asked Questions
Q: What is ASTM A668 TP304/TP304L U-Tube?
A: It is a stainless steel U-shaped tube utilized in warm exchangers and boilers. The U-bend plan obliges warm extension whereas keeping up auxiliary integrity.
Q: TP304 vs TP304L, what is the difference?
A: TP304L has lower carbon substance (0.035% max vs 0.08% max). This progresses erosion resistance in the heat-affected zone after welding. If your application includes welding, TP304L is frequently the superior choice.
Q: Why use U-Tube instead of straight tube?
A: U-tubes handle warm development way better and decrease stretch in warm exchangers. The coasting tube sheet plan permits for differential extension without forcing stretch on tube-to-tubesheet joints. This expands hardware life and decreases upkeep costs.
Q: Can you provide custom lengths or bending radius?
A: Yes. We make tubes to your determinations. Share your specialized drawing, and we'll affirm possibility inside 24 hours.
Q: What documents do you provide for quality assurance?
A: We supply fabric test certificates (EN 10204 3.1 or 3.2), third-party review reports, welding strategy determinations, and non-destructive testing reports as required.
Get Your Project Started
Ready to choose the ASTM A668 TP304 TP304L U-Tube to specify the right heat exchanger tubing for your application? Contact us at info@youfass.com for technical support and quotations.
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