Boiler Steel Tube - ASTM Certified Mill Direct Supplier | Kuaima Steel Group

Kuaima Steel Co., Ltd.

Verified Custom manufacturer 7yrs

Technical Specifications of Boiler Steel Tube

Property	Parameter	Description
Product Name	Boiler Steel Tube	Seamless steel tube for high-pressure boiler service
Material Grade	SA210 Gr.A1 / SA106 Gr.B / 20G / ST45.8 III	International equivalent grades for boiler applications
Standard Compliance	ASTM A210 / ASTM A106 / EN 10216-2 / GB 5310 / JIS G3461	Applicable international and national standards
Carbon (C)	0.17 - 0.27%	Per ASTM A210 Gr.A1 typical specification
Manganese (Mn)	0.27 - 0.93%	Enhances strength and hardenability
Silicon (Si)	≤ 0.10%	Deoxidizer element for steel purity
Phosphorus (P)	≤ 0.035%	Controlled to ensure weldability and toughness
Sulfur (S)	≤ 0.035%	Minimized to prevent hot shortness
Tensile Strength	415 - 585 MPa	Per ASTM A210 Gr.A1 requirement
Yield Strength	≥ 255 MPa	Minimum yield point per applicable standard
Elongation	≥ 30%	Measured on 50 mm gauge length specimen
Outer Diameter (OD)	10.2 - 219.1 mm	Customizable per project requirement
Wall Thickness (WT)	1.0 - 30.0 mm	Available in various schedules (SCH20-SCH160)
Length	4,000 - 12,000 mm	Fixed or random length available
Surface Finish	Black painted / Oiled / Varnished	Anti-corrosion treatment for storage and transport
Application	Power plant boilers, superheaters, economizers, heat exchangers	Suitable for medium and high-pressure steam service
Certification	ISO 9001 / PED 2014/68/EU / TÜV / BV / Lloyd's	Third-party inspection and mill test certificate EN 10204 3.1
Packaging	Bundle with steel strips, plastic caps on ends, waterproof wrapping	Seaworthy export packaging standard

Boiler Steel Tube - ASTM Certified Mill Direct Supplier | Kuaima Steel Group

Boiler steel tube serves critical roles in power generation, petrochemical processing, and industrial heating systems where reliable performance under elevated temperatures and pressures is non-negotiable. Engineered to withstand continuous thermal cycling and high-pressure steam environments, these tubes form the backbone of water-tube boilers, superheaters, economizers, and heat exchangers worldwide. At Kuaima Steel Group, we supply premium-grade boiler steel tubes directly from certified mills, ensuring full traceability, competitive mill-direct rates, and compliance with international standards including ASTM A192, ASTM A210, ASTM A213, and EN 10216-2.

Boiler steel tube manufacturer

What Is Boiler Steel Tube?

A boiler steel tube is a seamless or welded carbon steel or alloy steel tubular product specifically manufactured for service in boiler systems operating under medium to high pressure and elevated temperatures. Unlike general-purpose structural tubing, boiler tubes undergo stringent hydrostatic testing, non-destructive examination, and controlled heat treatment to guarantee leak-free performance under sustained thermal stress. Common material grades include SA192 (low-carbon steel for low-to-medium pressure service), SA210 Grade A-1 and C (medium-carbon steel for higher pressure applications), and SA213 T11, T22, and T91 (chromium-molybdenum alloy steels designed for superheater and reheater service at temperatures exceeding 565°C).

Boiler Steel Tube Technical Specifications

Our boiler tube inventory covers a comprehensive range of dimensions and grades to meet diverse project requirements. Below is a summary of key technical parameters:

Standard	Grade	OD Range	Wall Thickness	Min. Tensile Strength	Max. Service Temp.
ASTM A192	SA192	12.7–114.3 mm	1.6–12.7 mm	325 MPa	454°C
ASTM A210	SA210 Gr. A-1	15.9–127 mm	2.0–14.0 mm	415 MPa	482°C
ASTM A210	SA210 Gr. C	15.9–127 mm	2.0–14.0 mm	485 MPa	510°C
ASTM A213	SA213 T11	12.7–127 mm	1.6–12.7 mm	415 MPa	570°C
ASTM A213	SA213 T22	12.7–127 mm	1.6–12.7 mm	415 MPa	600°C
ASTM A213	SA213 T91	12.7–127 mm	2.0–14.0 mm	585 MPa	650°C
EN 10216-2	16Mo3	13.5–140 mm	2.0–16.0 mm	450 MPa	530°C

All boiler steel tubes undergo mandatory hydrostatic testing per ASTM A450 requirements, with each tube tested to a minimum pressure calculated from the formula P = 2St/D, ensuring zero-defect integrity before shipment. Non-destructive testing options include eddy current testing (ECT) and ultrasonic testing (UT) per ASTM E213 and E273 respectively.

Key Applications of Boiler Steel Tubes

Boiler tubes find extensive application across multiple high-demand industries:

Thermal Power Plants: Water wall tubes, superheater tubes, reheater tubes, and economizer tubes in coal-fired, gas-fired, and biomass boiler systems rated up to 25.4 MPa operating pressure.
Petrochemical Refineries: Process heater tubes, reformer tubes, and heat recovery steam generator (HRSG) tubing operating under cyclic thermal loads.
Industrial Steam Generation: Package boiler tubing for food processing, textile manufacturing, and pharmaceutical production facilities requiring saturated steam at 1.0–4.0 MPa.
Nuclear Power: SA213 T91 alloy tubes for secondary loop steam generators where outstanding creep-rupture strength at temperatures above 593°C is essential.

Why Source Boiler Steel Tubes from Kuaima Steel Group?

With over 15 years of experience in steel tube supply, Kuaima Steel Group maintains strategic partnerships with ASTM-certified mills including Baosteel, TPCO, and Sumitomo. Every boiler tube shipment includes EN 10204 3.1 Mill Test Certificates documenting chemical composition, mechanical properties, and test results. Our dedicated quality assurance team conducts independent third-party inspection through SGS, TÜV, or BV upon customer request, providing an additional layer of confidence for critical boiler projects.

Frequently Asked Questions

What is the MOQ?

Our minimum order quantity for boiler steel tubes is typically 1 metric ton per size and grade. For less common alloy grades such as SA213 T91, the MOQ may increase to 2–3 metric tons depending on mill production schedules.

Boiler steel tube supplier

Do you provide material test certificates?

Yes, every order ships with EN 10204 Type 3.1 Mill Test Certificates covering chemical analysis, tensile test results, flattening test data, and hydrostatic test confirmation. Third-party inspection certificates from SGS or TÜV are available upon request at additional cost.

What is the typical delivery time?

Standard boiler tube grades (SA192, SA210) in stock dimensions ship within 7–15 business days. Custom sizes or alloy grades (SA213 T22, T91) typically require 30–45 days for mill production and delivery, depending on quantity and specification complexity.

Can you cut to custom sizes?

Absolutely. We offer precision cutting services with tolerances of ±1 mm on length. Tubes can be supplied in random lengths (5–12 m), fixed lengths, or cut-to-size per your project drawings. Beveled ends for field welding are also available per ASME B16.25 specifications.

Get a Competitive Quote for Boiler Steel Tube

Whether you need SA192 seamless tubes for a package boiler retrofit or SA213 T91 alloy tubes for a supercritical power plant project, Kuaima Steel Group delivers certified boiler steel tubes at mill-direct rates with full technical support. Contact our sales team today with your required specifications — including grade, dimensions, quantity, and delivery destination — and receive a detailed quotation within 24 hours.

Boiler steel 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

Michael Pearson

United States

verified purchases

2025-01-12

Delivery Delay on T11 Order — Resolved Professionally
Ordered 5 tons of SA213 T11 tubes, 44.5mm OD x 4.0mm WT, for a water wall repair at our gas-fired plant. The original lead time was quoted at 35 days but ended up being closer to 50 days due to a mill scheduling issue. This caused some headaches with our outage planning. That said, Kuaima's team communicated the delay proactively, offered partial shipment of available stock to keep us going, and provided a freight discount on the balance. The tube quality itself was excellent — all eddy current tested, MTCs in order. They handled the problem professionally and I'd consider ordering again with more lead time buffer.

David Thornton

United Kingdom

verified purchases

2025-02-04

Competitive Pricing on SA192 — Minor Packaging Issue But No Tube Damage
We purchased 4 tons of SA192 seamless tubes, 31.8mm OD x 3.2mm WT, cut to 4-meter fixed lengths for a textile plant boiler retubing job. Price per ton was about 10% below what we'd been paying locally in the UK. The tubes themselves were spot-on — dimensions within tolerance, clean surface finish, mill certs all present. One bundle had some loose strapping on arrival which concerned us initially, but after inspection there was zero damage to the tubes. Mentioned it to their team and they assured us they'd reinforce packaging for future shipments. Tubes performed perfectly once installed. Fair deal for the money.

Ahmed Al-Rashidi

UAE

verified purchases

2025-03-06

Good Value on SA210 Gr. C for Refinery Heat Recovery Project
Ordered 15 tons of SA210 Grade C boiler tubes, 76.2mm OD x 5.5mm WT, for a heat recovery unit in our refinery expansion. Mill-direct pricing was noticeably lower than quotes from two other international traders. Quality was solid — tensile strength reported at 510 MPa against the 485 MPa minimum, and all hydrostatic tests passed. Delivery took slightly longer than initially quoted, about 20 days instead of 15, but nothing that impacted our project timeline. Documentation was complete and SGS inspection was arranged smoothly. Good value overall for the specification level.

Sarah Jennings

Australia

verified purchases

2025-04-09

Third Repeat Order — Consistently Good Quality and Pricing
This was our third order with Kuaima — 6 tons of SA210 Grade A-1, 51mm OD x 3.6mm WT, random lengths for industrial steam boiler maintenance across several food processing plants. Pricing remained competitive even with smaller tonnage per order. The tubes arrived in Sydney within 14 days since these were stock dimensions. Hydrostatic test certificates and full chemical analysis included as standard. Our QC team has never flagged a single defect across all three shipments. They've earned our repeat business and we've added them to our approved vendor list permanently.

Stefan Brauer

Germany

verified purchases

2025-05-01

EN 10216-2 16Mo3 Tubes Met All TÜV Requirements
Procured 8 tons of 16Mo3 seamless boiler tubes per EN 10216-2, dimensions 33.7mm x 4.0mm, for a biomass boiler project. We requested TÜV third-party inspection at the mill and Kuaima coordinated the entire process without any issues. All tubes passed hydrostatic testing and the mechanical properties on the 3.1 certificates were comfortably above minimum requirements — tensile strength came in around 490 MPa. Packaging was proper with steel caps on both ends. Delivery to Hamburg port took about 5 weeks total. Would recommend for European boiler manufacturers needing certified mill-direct supply.

Anita Mehta

India

verified purchases

2025-06-03

Excellent Technical Support on T91 Grade Selection
We needed SA213 T91 alloy tubes for an HRSG project at a petrochemical refinery — 50.8mm OD x 5.6mm WT, approximately 3.5 tons. Kuaima's technical team helped us verify the creep-rupture specifications for our 620°C design temperature and recommended the correct normalizing and tempering condition. The tubes arrived in 42 days with full documentation including eddy current test reports per ASTM E213. Beveled ends were done per ASME B16.25 which saved our fabrication shop significant prep time. Very professional experience from quotation through delivery.

Robert Callahan

United States

verified purchases

2025-06-25

Reliable SA192 Supply for Our Package Boiler Production Line
We've been sourcing SA192 seamless tubes from Kuaima for our package boiler manufacturing — typically 25.4mm OD x 2.77mm WT in 6-meter fixed lengths. The quality has been consistent across four separate orders totaling roughly 40 tons over the past year. Chemical composition on the mill certs consistently falls within tight ranges, and flattening test results are always included. Their sales team responds to RFQs within hours, not days. Mill-direct pricing saves us about 8-12% compared to our previous distributor. Solid B2B partner for volume boiler tube procurement.

James Whitfield

United Kingdom

verified purchases

2025-07-10

SA213 T22 Tubes Performed Flawlessly in Our Superheater Retrofit
We ordered 12 metric tons of SA213 T22 seamless boiler tubes, OD 38.1mm x 4.0mm WT, for a superheater replacement on our 150MW coal-fired unit. Every tube came with EN 10204 3.1 MTCs and the hydrostatic test reports were thorough. UT inspection results matched our own third-party verification through TÜV. Delivery took 38 days from order confirmation which was right within the quoted window. The dimensional consistency across all bundles was excellent — wall thickness variance stayed well under tolerance. Already planning our next order for the economizer section.