ASTM A688 Tubes Supplier and Manufacturer in India
Cerapure Steel is one of the leading manufacturers, suppliers, stockists, and exporters of premium quality ASTM A688 tubes, stainless steel welded feedwater heater tubes, and ASME SA688 tubing in India. We manufacture high-performance ASTM A688 stainless steel tubes using advanced welding and cold working processes in compliance with ASTM A688 / ASME SA688 standards.
Our ASTM A688 tubes are widely used in feedwater heaters, heat exchangers, condensers, power generation plants, petrochemical industries, refineries, boilers, and industrial heat transfer systems. These tubes are available in SS 304, SS 304L, SS 316, SS 316L, SS 321, and other austenitic stainless steel grades with superior corrosion resistance and high-temperature performance.
What is ASTM A688 Tube?
ASTM A688 tube is an electric-fusion welded austenitic stainless steel feedwater heater tube designed for corrosion resistance, high pressure, and elevated temperature applications. These tubes are manufactured with automatic welding processes and are cold worked to improve strength and dimensional accuracy.
ASTM A688 stainless steel tubing is commonly used in condensers, heat exchangers, and feedwater heating systems in power plants and industrial process industries.
1/4″ NB to 24″ NB Seamless 1/4″ NB to 48″ NB Welded
SCH 5 to SCH XXS
ASTM A312, A249, A269, A270
What is ASTM A688 Tube?
Specification | Details |
Product Name | ASTM A688 Tubes |
Standard | ASTM A688 / ASME SA688 |
Tube Type | Welded Austenitic Stainless Steel Tube |
Material Grade | TP304, TP304L, TP316, TP316L, TP321 |
Outer Diameter | 12.7 mm to 127 mm |
Thickness | 0.7 mm to 12 mm |
Length | Single Random / Double Random / Custom |
Finish | BA, AP, Polished |
End Type | Plain End / Beveled End |
Application | Feedwater Heater & Heat Exchanger |
Global Export Network
As leading ASTM A688 Tube Exporters, we export worldwide to:
North America: USA, Canada, Mexico
South America: Brazil, Argentina, Chile, Peru, Colombia
Europe: Germany, France, Italy, Spain, Netherlands, Belgium, Poland, Austria, Switzerland, United Kingdom
Middle East: Saudi Arabia, UAE, Qatar, Oman, Kuwait, Bahrain
Asia: Singapore, Malaysia, Indonesia, Thailand, Vietnam, Philippines, Japan, South Korea, Sri Lanka, Bangladesh, Nepal
Africa: South Africa, Egypt, Nigeria, Kenya, Tanzania, Morocco
Oceania: Australia, New Zealand
Note: – All shipments are supplied with export-grade packaging and complete documentation.
Serving All Major Cities in India
As premier ASTM A688 Tube Manufacturers In India, we serve:
Mumbai, Navi Mumbai, Thane, Palghar, Pune, Nashik, Aurangabad, Ahmedabad, Vadodara, Surat, Vapi, Ankleshwar, Bharuch, Dahej, Jamnagar, Rajkot, Chennai, Bangalore, Coimbatore, Hyderabad, Visakhapatnam, Vijayawada, Kochi, Palakkad, Thiruvananthapuram, New Delhi, Noida, Gurugram, Faridabad, Jaipur, Neemrana, Bhiwadi, Ludhiana, Jalandhar, Kolkata, Howrah, Durgapur, Haldia, Raipur, Bhilai, Nagpur, Indore, Bhopal.
ASTM A688 Tube Grades
Grade | UNS No | EN Standard |
TP304 | S30400 | 1.4301 |
TP304L | S30403 | 1.4307 |
TP316 | S31600 | 1.4401 |
TP316L | S31603 | 1.4404 |
TP321 | S32100 | 1.4541 |
SS 316 ASTM A688 tubes provide improved pitting and chloride corrosion resistance compared to SS 304 tubes.
Types of ASTM A688 Tube
ASTM A688 Tube Sizes
Nominal Size | OD Size |
1/2” | 12.70 mm |
3/4” | 19.05 mm |
1” | 25.40 mm |
1-1/4” | 31.75 mm |
1-1/2” | 38.10 mm |
2” | 50.80 mm |
3” | 76.20 mm |
4” | 101.60 mm |
ASTM A688 Tube Surface Finish
Finish Type | Description |
Bright Annealed | Smooth Bright Surface |
Annealed & Pickled | Oxide-Free Finish |
Polished Finish | Decorative Smooth Finish |
Cold Worked Finish | Improved Mechanical Strength |
Manufacturing Process of ASTM A688 Tubes
Process | Description |
Raw Material Selection | Austenitic Stainless Steel |
Forming | Tube Rolling Process |
Automatic Welding | Electric Fusion Welding |
Cold Working | Strength Improvement |
Annealing | Heat Treatment |
Pickling | Oxide Removal |
Testing | Dimensional & Pressure Testing |
Finishing | Surface Finishing |
Packaging | Export Packaging |
The ASTM A688 tube manufacturing process ensures excellent dimensional accuracy and high corrosion resistance.
Chemical Composition of ASTM A688 Tubes
Grade | Chromium | Nickel | Molybdenum |
TP304 | 18-20% | 8-11% | — |
TP304L | 18-20% | 8-13% | — |
TP316 | 16-18% | 10-14% | 2-3% |
TP316L | 16-18% | 10-14% | 2-3% |
Mechanical Properties of ASTM A688 Tubes
Grade | Tensile Strength | Yield Strength | Elongation |
TP304 | 515 MPa | 205 MPa | 35% |
TP304L | 485 MPa | 170 MPa | 35% |
TP316 | 515 MPa | 205 MPa | 35% |
TP316L | 485 MPa | 170 MPa | 35% |
ASTM A688 tubing provides excellent strength, ductility, and pressure resistance for industrial heat transfer applications.
Advantages of ASTM A688 Tubes
- Excellent Corrosion Resistance
- High Temperature Resistance
- Superior Weldability
- Excellent Heat Transfer Efficiency
- Smooth Internal Surface
- Long Service Life
- High Pressure Resistance
- Low Maintenance
- Excellent Fabrication Properties
- Durable Construction
Applications of ASTM A688 Tubes
- Feedwater Heaters
- Heat Exchangers
- Thermal Power Plants
- Condensers
- Petrochemical Industry
- Oil & Gas Industry
- Refineries
- Industrial Boilers
- Chemical Processing Plants
- Process Industries
ASTM A688 tubes are extensively used in feedwater heating and heat transfer systems because of their excellent corrosion resistance and durability.
ASTM A688 Tube Testing
Cerapure Steel performs multiple quality tests to ensure international quality compliance.
Testing Methods
- Hydrostatic Test
- Eddy Current Test
- Ultrasonic Test
- PMI Test
- Flattening Test
- Flaring Test
- Hardness Test
- Visual Inspection
ASTM A688 Tube Statistics
Property | Value |
Corrosion Resistance | Excellent |
Pressure Resistance | High |
Temperature Resistance | Up to 650°C |
Weldability | Excellent |
Surface Finish | BA / AP / Polished |
Recyclability | 100% Recyclable |
Service Life | 25+ Years |
Maintenance | Low |
Why Choose Cerapure Steel?
- Leading ASTM A688 Tube Manufacturer in India
- ASTM & ASME Standard Products
- Welded Stainless Steel Feedwater Heater Tubes
- Large Ready Stock Availability
- Export Quality Packaging
- Fast Delivery Across India & Worldwide
- Third Party Inspection Available
- Competitive ASTM A688 Tube Prices
- Technical Support & Documentation
Frequently Asked Questions (FAQs)
01.
What is ASTM A688 tube?
02.
Which grades are available in ASTM A688 tubing?
03.
What are the applications of ASTM A688 tubes?
04.
What is the difference between ASTM A688 and ASTM A249?
05.
What testing methods are performed on ASTM A688 tubes?
Our Product List
