ASME SA179 Boiler Tube - Mill Direct Seamless Supplier | Kuaima Steel Group

Kuaima Steel Co., Ltd.

Verified Custom manufacturer 7yrs

Technical Specifications of ASME SA179 Boiler Tube

Property	Parameter	Description
Product Name	ASME SA179 Boiler Tube	Seamless cold-drawn low-carbon steel heat-exchanger and condenser tube
Material Grade	SA179 / A179	Equivalent to ASTM A179, DIN 17175 St35.8, EN 10216-2 P195GH, GB 3087 10#
Standard Compliance	ASME SA179 / ASTM A179	Standard specification for seamless cold-drawn low-carbon steel heat-exchanger and condenser tubes
Carbon (C)	≤ 0.06 %	Low carbon content ensures excellent cold-drawing formability and weldability
Manganese (Mn)	0.27 – 0.63 %	Provides adequate strength and toughness
Phosphorus (P)	≤ 0.035 %	Controlled to minimize brittleness
Sulfur (S)	≤ 0.035 %	Controlled to ensure clean steel and good surface quality
Tensile Strength	≥ 325 MPa (47 ksi)	Minimum value per ASME SA179 specification
Yield Strength	≥ 180 MPa (26 ksi)	Minimum value per ASME SA179 specification
Elongation	≥ 35 %	Measured on 50 mm gauge length, indicating excellent ductility
Outside Diameter (OD)	6.0 – 76.2 mm (1/4'' – 3'')	Common range; customized sizes available upon request
Wall Thickness (WT)	0.5 – 5.0 mm	Minimum wall thickness per BWG or custom specification
Length	3,000 – 18,000 mm	Fixed length, random length, or cut-to-length available
Surface Finish	Bright annealed / Pickled	Smooth inner and outer surfaces; suitable for heat-transfer efficiency
Application	Boilers, Heat Exchangers, Condensers, Economizers	Widely used in power plants, petrochemical, HVAC, and industrial heating systems
Certification	ISO 9001, PED 2014/68/EU, Mill Test Certificate EN 10204 3.1	Third-party inspection (TPI) such as SGS, BV, Lloyd's available on request
Packaging	Bundle with steel strips, plastic caps on both ends	Wooden cases or pallets for export; anti-rust oil coating applied
MOQ	1 Metric Ton	Smaller trial orders negotiable; stock items available for prompt delivery

ASME SA179 Boiler Tube - Mill Direct Seamless Supplier | Kuaima Steel Group

ASME SA179 boiler tube is a cold-drawn, low-carbon seamless steel tube specifically engineered for heat exchanger and condenser service in power generation, petrochemical, and HVAC industries. As a mill-direct supplier, Kuaima Steel Group delivers SA179 seamless tubes with full traceability, competitive mill-direct rates, and strict compliance with ASME and ASTM standards. Whether you are sourcing tubes for a new boiler installation or a maintenance turnaround, our inventory and production capacity ensure reliable supply with short lead times. Every tube ships with an original mill test certificate (MTC) per EN 10204 3.1, giving your procurement team the documentation needed for code-compliant projects.

What Is ASME SA179 Boiler Tube?

ASME SA179 (equivalent to ASTM A179) is a specification covering minimum-wall-thickness, cold-drawn, low-carbon steel seamless tubes intended for tubular heat exchangers, condensers, and similar heat transfer apparatus. The low-carbon composition (≤0.06% C) provides superior cold-drawing workability and excellent thermal conductivity, making SA179 the preferred choice for applications requiring efficient heat transfer combined with reliable pressure containment at moderate temperatures up to approximately 425°C (800°F).

ASME SA179 boiler tube supplier

ASME SA179 Boiler Tube Technical Specifications

Below are the key chemical composition and mechanical property requirements defined by the SA179 standard. All values represent guaranteed minimums or maximums per the specification.

Property	Requirement
Standard	ASME SA179 / ASTM A179
Steel Grade	Low-carbon steel (C ≤ 0.06%, Mn ≤ 0.27%)
Manufacturing Process	Cold-drawn seamless
Tensile Strength	325 MPa (47 ksi) minimum
Yield Strength	180 MPa (26 ksi) minimum
Elongation (in 50 mm)	35% minimum
Hardness	72 HRB maximum
Common OD Range	6.35 mm – 76.2 mm (¼″ – 3″)
Wall Thickness	0.5 mm – 5.0 mm (BWG 7 – BWG 22 typical)
Length	Up to 18,000 mm, cut-to-length available
Surface Finish	Bright annealed or black annealed
Testing	Hydrostatic test at 6.9 MPa (1,000 psi) or nondestructive electric test; flattening test; flaring test

Key Applications of SA179 Seamless Boiler Tubes

ASME SA179 boiler tubes find extensive application across industries that demand dependable heat transfer performance under pressure:

Power Plants: Shell-and-tube condensers, feedwater heaters, and economizer sections in coal-fired, gas-fired, and combined-cycle power stations.
Petrochemical & Refining: Heat exchangers in crude distillation units, catalytic reformers, and amine treating systems.
HVAC & Refrigeration: Chiller tubes and evaporator coils in large-scale commercial cooling systems.
Desalination: Multi-stage flash (MSF) and multi-effect distillation (MED) heat transfer sections.

Why Choose Kuaima Steel Group for SA179 Boiler Tubes?

Mill-Direct Pricing: Eliminate intermediary markups with cost-effective supply straight from partnered mills.
Comprehensive Inventory: Over 2,000 tons of SA179 tubes in standard BWG sizes ready for prompt dispatch.
Quality Assurance: 100% hydrostatic or eddy-current testing; MTC per EN 10204 3.1 with every shipment.
Third-Party Inspection: SGS, TÜV, BV, and Lloyd's inspection coordination available upon request.

Frequently Asked Questions

What is the MOQ for ASME SA179 boiler tubes?

Our minimum order quantity is typically 1 ton for standard sizes in stock. For non-standard dimensions or custom lengths, the MOQ may increase to 3–5 tons depending on the mill production schedule.

ASME SA179 boiler tube manufacturer

Do you provide material test certificates?

Yes. Every shipment includes an original mill test certificate (MTC) compliant with EN 10204 3.1, covering chemical composition, mechanical properties, hydrostatic or NDE test results, and dimensional verification.

What is the typical delivery time?

Stock items ship within 5–7 business days. Custom production orders generally require 25–35 days from order confirmation, depending on size and quantity.

Can you cut to custom sizes?

Absolutely. We offer precision cut-to-length service with a tolerance of ±1 mm, along with deburring and end-finishing options including plain end, bevel end, or swaged end per your project specifications.

Get a Competitive Quote for ASME SA179 Boiler Tube

Ready to secure premium-grade SA179 seamless boiler tubes at mill-direct rates? Contact Kuaima Steel Group today with your required dimensions, quantity, and delivery destination. Our dedicated sales engineers will respond within 12 hours with a detailed quotation, stock availability, and logistics plan tailored to your project timeline.

ASME SA179 boiler tube factory

Ratings & Reviews

5.0

Very satisfied

Based on 8 reviews for verified purchases

Supplier service

5.0

On-time shipment

5.0

Supplier service

5.0

Mark Henderson

Australia

verified purchases

2025-02-10

Initial Delay Resolved Professionally
Ordered 10 tons of SA179 tubes, 12.7mm OD × 1.24mm WT, for a chiller tube replacement in Melbourne. The original delivery was delayed by about 10 days beyond the confirmed schedule due to a mill production backlog. I was frustrated initially, but their sales team communicated proactively, offered a partial shipment from stock to keep our project moving, and expedited the balance. Final product quality was perfectly fine — met all ASTM A179 requirements. The issue was handled well, so I'd consider ordering again with a longer planning buffer.

Michael Torres

United States

verified purchases

2025-03-04

Competitive Pricing for Custom Lengths
Ordered 15 tons of ASME SA179 tubes at 25.4mm OD × 2.11mm WT, cut to 7,320mm lengths for a refinery heat exchanger bundle. Pricing was very competitive compared to domestic mills, even factoring in freight to Houston. The cut-to-length accuracy was good — measured several pieces and all were within ±0.8mm. MTC documentation was thorough. Delivery took 32 days for the custom production, which was within their quoted 25-35 day window. Would rate higher if lead time could be shortened, but overall a solid supplier.

David Thornton

United Kingdom

verified purchases

2025-03-26

Good Value, Minor Packaging Issue
Purchased 8 tons of SA179 seamless tubes, 19.05mm OD × 2.77mm WT (BWG 12), for an economizer replacement. The mill-direct pricing was noticeably lower than our usual European distributors — saved roughly 12% on material cost. Tube quality was solid: clean surface, accurate dimensions, and all mechanical properties met ASME requirements. Only minor complaint was some plastic end caps came loose during shipping, causing light surface oxidation on a few tube ends. Nothing that affected usability, but worth improving for future shipments.

Ahmed Al-Rashidi

UAE

verified purchases

2025-04-17

Third Order This Year — Consistently Good Quality
This is our third purchase from Kuaima in 2025 — totaling around 60 tons of SA179 tubes across multiple projects including refinery heat exchangers and chiller units. OD sizes from 9.53mm to 38.1mm. Quality has been consistent every time: proper cold-drawn seamless manufacture, accurate wall thickness, and complete EN 10204 3.1 certification. We arranged BV inspection on the second order and everything passed without remarks. They've become our primary SA179 supplier for the Middle East region.

Sarah Mitchell

United Kingdom

verified purchases

2025-05-09

Fast Turnaround for Emergency Maintenance
During a scheduled maintenance turnaround at a gas-fired power station, we discovered additional tube failures and urgently needed 6 tons of SA179 tubes, 15.88mm OD × 1.24mm WT. Kuaima confirmed stock availability same day and shipped within 5 business days to Southampton. The tubes passed our incoming inspection — tensile strength reported at 358 MPa, well above the 325 MPa minimum. Hardness readings were consistently under 72 HRB. Their responsiveness during a time-critical shutdown was genuinely appreciated.

Rajesh Mehta

India

verified purchases

2025-06-01

Reliable Supply for Our Desalination Project
We needed 45 tons of ASTM A179 seamless boiler tubes for a multi-effect distillation plant in Gujarat. Sizes ranged from 15.88mm to 25.4mm OD in various BWG gauges. Kuaima quoted competitively — roughly 8-10% below other suppliers we contacted — and delivered the full quantity in 30 days. Eddy current test reports were clean across all batches. The bright annealed surface finish was consistent and suited our corrosion-sensitive application. Documentation was complete for our ASME code compliance filing.

Dr. Stefan Brückner

Germany

verified purchases

2025-06-23

Precise Dimensions and Full Traceability
Sourced SA179 tubes in 25.4mm OD × 1.65mm WT for shell-and-tube heat exchangers in our petrochemical client's amine treating unit. Ordered 12 tons cut-to-length at 6,100mm. The dimensional tolerance was within ±0.5mm — better than the ±1mm they promise. Flattening and flaring test reports were included alongside the MTC. We coordinated TÜV inspection at the mill and Kuaima handled the logistics smoothly. Chemical composition showed carbon at 0.05%, well under the 0.06% max. Very professional technical support from their sales engineers.

James Caldwell

United States

verified purchases

2025-07-08

Excellent SA179 Tubes for Our Condenser Retrofit
We ordered 28 tons of ASME SA179 seamless tubes, 19.05mm OD × 2.11mm WT (BWG 14), for a condenser re-tube project at a combined-cycle plant in Texas. Kuaima delivered within 6 days from their stock — genuinely impressive. Every bundle came with EN 10204 3.1 MTCs and the hydrostatic test results matched perfectly. Our QC team verified wall thickness on random samples and all fell within spec. The cold-drawn finish was clean with no pitting. Will definitely use them for our upcoming feedwater heater replacement.