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GB 3087 Gr10,Gr20 seamless boiler tube

Attention:     Issuing time:2019-11-13 17:28
GB 3087 Gr10, Gr20 seamless boiler tube
GB 3087 Gr10, Gr20 seamless steel pipe for low and medium pressure boilers
Gr10, Gr20 are the two grades of GB 3087 standard, GB 3087——The Specification for seamless steel pipe for low and medium pressure boilers

GB 3087 standard specifies the dimensions, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality specifications of seamless steel tubes for low and medium pressure boilers.
This standard is applicable to the manufacture of high-quality carbon structural steel hot-rolled (extruded, expanded) and cold drawn (rolled) seamless steel tubes for various structural low-pressure and medium-pressure boilers and locomotive boilers.

Steel Grade:
Grade 10, Grade 20
Steel pipe production process: hot rolling, cold drawing
GB 3087 Gr10, Gr20 seamless boiler tube Quick Details
Type:Seamless Steel Pipe.
Material: Gr 10, Gr 20
WT: 3.2-21mm.
OD: 33-323mm
Length: 6M or specified length as required.
Ends: Plain End, Beveled End, Treaded
FOB Price: US $550-1300 / Ton | 1 Ton/Tons (Min. Order)
Additional Info
Port of Shipment: Tianjin, China
Payment Terms:T / T, LC
Delivery: 7-15 days after payment
Surface: Tubes will be varnished (Outside only) to prevent rust.
Marking: Standard + Steel Grade + Size + Heat No + Lot No
Package:Standard export package,suit for all kinds of transport, or as required

Tolerances of outer diameter and wall thickness

Type of steel pipe Outer diameter(mm) Tolerance
ordinary advanced
Hot rolled tube OD ≤159 ±10%(min±0.50mm) ±0.75%(min±0.40mm)
>159 ±1.0% ±0.90%
WT ≤20 +15.0%(min+0.45mm)
-12.5% -0.35mm)
>20 ±12.5% ±10%
OD≥351 ±15%
Cold drawn tube OD 10~30 ±0.40mm ±0.20mm
>30~50 ±0.45mm ±0.25mm
>50 ±1.0% ±0.75%
WT 1.5~3.0 +15%
>3.0 +12.5%


Chemical composition of GB 3087 seamless boile tube

Standard Grade Chemical Composition(%)
C Si Mn P S Cr Cu Ni
GB3087 10 0.07~0.13 0.17~0.37 0.38~0.65 ≤0.030 ≤0.030 0.3~0.65 ≤0.25 ≤0.30
20 0.17~0.23 0.17~0.37 0.38~0.65 ≤0.030 ≤0.030 0.3~0.65 ≤0.25 ≤0.30

Mechanical properties of GB 3087 seamless boile tube

Standard Steel pipe Wall thickness
Tensile strength
Yield Strength
GB3087 10 / 335~475 195 24
20 <15 410~550 245 20
≥15 225

According to the requirements of the purchaser, the supplier and the buyer shall negotiate and indicate the test temperature in the contract, and the supplier shall provide the actual high-temperature transient performance data of the steel pipe.

Minimum yield strength of steel pipe at high temperature

Steel grade  Sample status Temperature,℃
200 250 300 350 400 450
10 Delivery status 165 145 122 111 109 107
20 188 170 149 137 134 132

Test items:
Chemical composition,Stretching test,Hydraulic test,Flattening test,Crimping test,Flaring test,Bending test,Low magnification test,Ultrasonic flaw detection,Eddy current testing,Magnetic flux leakage test.

Delivery weight
The delivery weight of steel pipes shall comply with the provisions of GB/T 19395. The density of the steel is calculated as 7.85 kg/dm3.
Delivery status
Steel pipes shall be delivered in hot rolled or heat treated condition. The finishing temperature of the steel pipe delivered in the hot rolled state shall not be less than Ar3.


whatapp: +8615003211561,

E-mail:jinxiaolong0221@gmail.com ,beitesteelpipe@gmail.com


whatapp: +8615003171886

E-mail:jinxiaolong0221@gmail.com ,beitesteelpipe@gmail.com

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