GB/T 3087 boiler tube

At a glance

GB/T 3087 is the Chinese standard for seamless steel tubes for low- and medium-pressure boilers, in grades 10 and 20. It is used for superheated and saturated steam pipes, water-wall and economiser tubes and smoke tubes. The current edition is GB/T 3087-2022. Tubes are sized by outside diameter × wall thickness to GB/T 17395.

Standards

GB/T 3087

Grades

10, 20

Manufacture

Hot-finished or cold-drawn

Dimensions

GB/T 17395

Lengths

6 m or 12 m fixed lengths, or single/double random (SRL/DRL)

Ends

Plain end (PE) · Bevelled end (BE)

Surface

Black varnish or bare, as the mill supplies; ask us about other coatings

HS code

7304.39, 7304.31 Indicative. Your customs broker confirms the national tariff line.

Availability

Supplied to order

Grades and mechanical properties

10 · 20 — Grades to the standard; tell us the grade in your specification.

Sizes

Sized by outside diameter × wall thickness (GB/T 17395). Send us the sizes you need.

Full pipe schedule chart

Testing

• Chemical analysis
• Tensile test
• Flattening test
• Flaring test
• Hydrostatic test
• Non-destructive testing (UT / eddy current)
• Visual and dimensional inspection

Documents

Mill test certificate to EN 10204 3.1, naming the producing mill and the country of origin. Third-party inspection by an agency you nominate, or EN 10204 3.2, on request.

Applications

• Low- and medium-pressure boilers
• Superheated and saturated steam pipes
• Water-wall and economiser tubes
• Boiler smoke and arch tubes