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High-pressure seamless tube

High-pressure seamless tube
High-pressure seamless pipe, often referred to as high-pressure boiler tube, is the most technologically advanced and stringent quality branch of seamless steel pipe.
Simply put, if ordinary seamless pipe is likened to "blood vessels," then high-pressure seamless pipe is the "aorta," specifically designed to transport high-temperature, high-pressure, and high-risk media (such as main steam in power plants and cracked oil and gas in oil refineries).

No. 121, Daqiao Road, Licheng District, Jinan City

Product Description
Spot warehousing
Product Inspection
Product Measurement
Customer Feedback
Parameter categoriesSpecific projectsDetailed description/numerical range
Specifications and dimensionsOuter diameter (OD)10mm - 530mm

 Cold-drawn precision tubes: 10mm - 108mm

 Hot-rolled thick-walled tubes: 32mm - 530mm (or even larger)

Wall thickness (WT)2mm - 70mm

 Standard range: 2.5mm - 40mm

 Extra-thick walls (e.g., main steam pipes): up to 70mm

length3m - 12.5m

 Usually fixed length (e.g., 6m, 9m, 12m), variable length is usually 4m-12m

Core materialsHigh-quality carbon steel20G (most commonly used, high-pressure boiler tubes)

20MnG, 25MnG

alloy steel15CrMoG (temperature resistance 550℃)

12Cr1MoVG (temperature resistance 580℃)

12Cr2MoG (hydrogen corrosion resistant)

American Standard/European StandardSA210 A1/C (American Standard Carbon Steel)

SA213 T11/T22/T91 (American Standard Alloy Steel)

ST45.8 (German Standard)

Implementation StandardsChinese national standardGB 5310-2017/2023 Seamless Steel Tubes for High-Pressure Boilers
Internationally applicableASME SA213 / SA335 (American Society of Mechanical Engineers standards)

DIN 17175 (German standard)

Mechanical propertiestensile strength≥ 410 MPa
Yield strength≥ 245 MPa
elongation≥ 24%
Operating temperature-20℃ to 450℃ (long-term use) Alloy steel material can withstand 600℃+
Inspection and DeliveryKey TestIndividual hydrostatic test (no leakage required)

Ultrasonic/eddy current testing (for internal defects)

Flattening test (for plasticity testing)

Delivery statusTypically, it is normalized or normalized + tempered (to ensure structural stability).


仓库现货6


01

Acid and alkali resistance test

02

Zinc layer experiment

03

Bending test

04

Yield strength test

05

Tensile strength test

06

Spectral detection

07

Hardness testing

08

Chemical composition detection

壁厚测量

Thickness measurement

厚度测量

Thickness measurement

厚度测量666

Thickness measurement

半径测量

Radius measurement

直径测量

Diameter measurement

直径测量2

Diameter measurement

长度测量

Length measurement

涂层测量

Coating measurement

TESTIMONIALS

The quality of this batch of steel pipes far exceeded expectations. The material is uniform and thick, the cut is smooth and burr-free, and the installation is seamless. The project efficiency was maximized, and the cooperation was very pleasant!

Julian

Julian

Sales Director

We've collaborated several times, and the hardness and toughness of the steel perfectly meet our project standards. The delivery speed is fast, and the packaging is secure with no damage. A reliable supplier is our first choice!

John Smith

John Smith

Sales Director

The surface treatment of the steel pipe is very good, the anti-rust coating is uniform and firm, and the dimensional accuracy is very high. It does not require secondary processing at all, which greatly saves our time and costs.

Freya

Freya

Purchasing Manager

The steel is very cost-effective, has stable mechanical properties, and passed the test on the first try. Customer service responded promptly, and communication was very smooth. We will continue to cooperate with them in the long term.

Elara

Elara

Purchasing Manager

The custom-made irregular-shaped steel pipes perfectly replicated our design drawings. The workmanship was exquisite and flawless, and the delivery time perfectly met the project schedule. We are extremely satisfied with this purchase!

Lila

Lila

Purchasing Manager

 Online Consultation

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