Precision Welded SS304/304L Heat-Exchanger Steel Tube ASTM A249 with SGS/Mtc for /HVAC

• Customization: Available
• After-sales Service: Oversea After-Sales Service
• Warranty: 1 Years
• Model NO.: ASTMA213/312/790/358/249/269
• Type: Welded
• Technique: Cold Rolled
• Material: Stainless Steel
• Surface Treatment: Polished
• Usage: Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose
• Section Shape: Round
• Products: S31803/304/316 U Tube/Seamless Stainless Steel Pip
• Standard Specifications: ASTM A213/A312/A790
• Steel Grades: TP304/304h/304L/316/316h/316L/316ti/309/310/317L
• Main Process: Cold-Formed Seamless
• Unit Leagth: 5800mm-12000mm
• Od: 3-400mm
• Wt: 1-10mm
• Ends: Plain Ends/Bevel Ends
• Surface: Pickled, Bright Annealed, Polished
• Used1: Pipeline Transport, Boiler Pipe, Hydraulic/Automob
• Used2: Electronics, Industrial, Food, Heat Exchanger
• Used3: Marine, Construction, Offshore Project
• Used4: Petroleum, Papermaking, Energy, Sewage
• Delivery: 7-35 Days
• Package: Packed by Bundles, Plastic Bags, Wooden Case
• Transport Package: Seaworthy Package
• Specification: 0.8mm-25mm
• Trademark: EZ Steel
• Origin: China
• HS Code: 73043110
• Production Capacity: 500000/Year

Product Description

Precision Welded SS304/304L Heat-Exchanger Steel Tube ASTM A249 with SGS/MTC for /HVAC

Product Description

 

Stainless Steel Boiler Tube Specifications Table

Category	Details
Standards	ASTM A213 / ASME SA213 (US), EN 10216-5 (EU), JIS G3463 (Japan), GB/T 13296 (China), DIN 17456 (Germany)
Material Grades	TP304/304L, TP316/316L, TP321/321H, TP347/347H, S31803 (Duplex), S31008 (High-Temp)
Dimensions	- OD: 6mm ~ 426mm (1/4" ~ 16") - Wall Thickness: 1mm ~ 40mm (SCH 5S ~ SCH XXS) - Length: 1m ~ 12m (Customizable)
Coatings	Pickling & Passivation, Mirror Polish (Ra ≤0.4μm), Electropolishing, Aluminized (for high-temp applications)
Processing	Seamless (Cold/Hot Finished), Welded (ERW/Laser Welded), Annealed, Solution Heat-Treated, Ultrasonic Tested
Packaging	- Bundled with steel strips & plastic caps - Wooden crates for heavy tubes - Waterproof film + seaworthy pallets (for export)
Payment Terms	T/T 30% Advance + 70% Before Shipment, LC at Sight, Western Union, PayPal (for samples)
Certifications	ISO 9001, PED 2014/68/EU, ASME Stamp, DNV-GL, TUV, NACE MR0175 (for sour gas), MTC (Mill Test Certificate)
Key Features	- High creep resistance (up to 800°C) - Acid/alkali corrosion proof - Low carbon content (304L/316L for welding) - Precision tolerances (±0.1mm)

 

304/304L Stainless Steel Boiler Tube - Technical Overview

Introduction

304/304L stainless steel boiler tubes are austenitic chromium-nickel alloy pipes designed for high-temperature and high-pressure applications in boilers, heat exchangers, and superheaters. The 304L variant has a lower carbon content (≤0.03%) to minimize carbide precipitation during welding, making it ideal for welded assemblies.

 

Key Features

1. Material Composition

   • 304: Cr (18-20%), Ni (8-10.5%), C (≤0.08%)

   • 304L: Cr (18-20%), Ni (8-12%), C (≤0.03%)

   • Low carbon in 304L enhances weldability and reduces intergranular corrosion.

2. Temperature Resistance

   • Continuous service: -200°C to 800°C (1472°F)

   • Short-term peak: 900°C (1652°F)

3. Corrosion Resistance

   • Excellent resistance to:

     • Oxidizing acids

     • Organic chemicals

     • Steam and freshwater

4. Mechanical Properties

   • Tensile Strength: ≥515 MPa (304) / ≥485 MPa (304L)

   • Yield Strength: ≥205 MPa (304) / ≥170 MPa (304L)

   • Elongation: ≥40%

 

Advantages Over Competitors

 Cost-Effective - Most widely used austenitic grade for boilers.
 Versatility - Suitable for both seamless and welded fabrication.
 Certified Compliance - Meets ASTM A213, ASME SA213, EN 10216-5.
 Easy Maintenance - Resists scaling and oxidation, reducing downtime.

 

Common Applications

• Power Plants: Superheaters, condensers, and steam pipelines.

• Chemical Processing: Heat exchangers, reactors, and evaporators.

• Food & Pharma: Sanitary tubing for sterilizers and CIP systems.

• HVAC: Boiler feedwater tubes and heat recovery units.

 

Comparison: 304 vs. 304L

Parameter	304	304L
Carbon Content	≤0.08%	≤0.03%
Weldability	Good (post-weld anneal recommended)	Excellent (no anneal needed)
Price	Slightly lower	2-5% higher
Best For	Non-welded high-temp systems	Welded assemblies in corrosive environments

 

Why Choose Our 304/304L Boiler Tubes?

• Precision Manufacturing: Tight tolerances (±0.1mm OD, ±10% wall thickness).

• Full Traceability: Mill Test Certificates (MTC) with heat number and chemical analysis.

• Global Logistics: Stocked in standard sizes (1/2"-12" OD), ready for CIF shipments.

Sample Product Code:
ASTM A213 TP304L Seamless Boiler Tube | 2" OD x 3mm Wall x 6m | PED Certified

 

 

 

 

Detailed Photos

 

 

 

FAQ

Q:  How many days can you deliver after confirmed the order?
A:  For stock:  within 5-7 days;
      For customized product:  around 30 days;
      For special sizes:  subject to negotiation.

Q: How does your company do quality control?
A: ISO 9001:2015 certified;
     Product certificate as per EN10204 3.1 or 3.2 as per customer's request.
    
  
Q: Can I have a factory-visit?
A:  Surely. All customers are welcome to visit us in China.

Q: Can I have a trial order?
A: Of course, it is an honor for us to have the opportunity to show our quality and service. 
 

Company Profile

	Business Type:	Manufacturer/Factory
	Main Products:	Carbon Steel Pipe , Stainless Steel Pipe , Copper Nickel Tube , Heat Exchanger Tube , Boiler ...
	Registered Capital:	2000000 RMB
	Plant Area:	>2000 square meters
	Management System Certification:	ISO 9001, ISO 14001, OHSAS/ OHSMS 18001, ANSI/ESD
	Average Lead Time:	Peak Season Lead Time: 1-3 months Off Season Lead Time: within 15 workdays

SGS Serial NO. :

QIP-ASI199413Report Verification

EZ STEEL INDUSTRIAL Co., Ltd, together with LONG-RUN METALS Co., Ltd, is the export division and window company of EZ STEEL GROUP, which was founded in 1996 and has been committed to the development and manufacturing of industrial tubes in the past 20 years. It is one of the largest steel tube manufacturing enterprise groups in China. The group possess fixed assets over 200million and more than 800 employees with annual production capacity over 300 thousand tons.

The company has continuously introduced the world advanced manufacturing equipment and now is able to produce welded and seamless steel tube, copper tube and nickle alloy tube. We also have our own coating facilities and workshops for further processing. After years of development, EZ STEEL GROUP and the affiliated enterprises have obtained many kinds of domestic and international certifications including ISO 9001 Quality Management System Certification, ISO14000 Environment Management System Certification, CE, License for Manufacture of Pressure Piping in China, etc. The company has obtained good domestic achievements and is the nominated supplier of CNPC and CNOOC. The product are exported to Southeast Asia, the Middle East and Africa, Europe, Australia, North and Latin Americas via trade companies, and are widely used in pipeline works, foundation works, steel structure works, boiler and condenser fabrication, oil refinery plant, power plant, sugar-making plant, ship-building and offshore construction projects etc.

Holding the concept of First-class Brand, First-class Service, First-class Value, EZ STEEL GROUP is aiming to build up a win-win enterprise platform for both our customers and employees.