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Low Medium high pressure boiler pipe

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Low or Medium pressure boiler seamless steel pipe

 Low pressure boiler pipe

 Standard

GB3087,ASTMA179,ASTMA106GR.B

 Business type

Manufacture

Size

OD 12MM-406MM* WT 1.5MM-25MM * Length: SRL, DRL, fixed length

Application。

Applicatio for heating pipelings,containers,steaming pipeline of low/medium pressure boliers(P<5.88Mpa,T<450℃)

high pressure boiler pipe

Low Medium high pressure boiler pipe,
1.Usage: high pressure boiler super heater tubes,
reheater tubes, airway the main steam pipes and so on.

2.Kinds: High-pressure,
medium pressure, low pressure, thick-walled, thin-walled, alloy and so on.

3.Grade:20G,20MnG,25MnG,15MoG,20MoG,12Cr1MoVG,
15CrMoVG,12Cr2MoG,12Cr2MoWVTiB,12Cr3MoVSiTiB,

 

●Size Tolerances

Standard

OD Tolerance (Common grade)

WT Tolerance(Common grade)

GB3087

Hot roll

D≤159mm

±1.0%(Min ±0.50mm)

S≤20mm

+15%-12.5% Min+0.45-0.35mm

D>159mm

±1%

S>20mm

±12.5%

GB3087

Cold drawn

10mm<D≤30mm

±0.40mm

 

 

30mm<D≤50mm

±0.45mm

1.5mm<S≤3.0mm

+15%-10%

D>50mm

±1%

S>3.0mm

+12.5%-10%

 

 

 

 

Standard

OD Tolerance (High grade)

WT Tolerance(High grade)

GB3087

Hot roll

D≤159mm

0.75%(Min ±0.40mm)

S≤20mm

±10%(Min±0.30mm)

D>159mm

±0.90%

S>20mm

±10%

GB3087

Cold drawn

10mm<D≤30mm

±0.20mm

 

 

30mm<D≤50mm

±0.25mm

1.5mm<S≤3.0mm

±10%

D>50mm

±0.75%

S>3.0mm

±10%

ASTMA179  OD and WT Tolerance according to SA-450/SA-450M)

Standard

OD Tolerance

WT Tolerance

ASTMA179

D<1〞(25.4mm)

±0.10mm

S≤11/2〞

+20%-0%

1〞<D≤11/2〞

±0.15mm

11/2〞<D≤2〞

±0.20mm

2〞<D≤21/2〞

±0.25mm

21/2〞<D≤3〞

±0.30mm

S>11/2〞

+22%-0%

3〞<D≤4〞

±0.38mm

4〞<D≤71/2〞

+0.38-0.64mm

71/2〞<D≤9〞

+0.38-1.14mm

 

●Mechanical properties

Standard

Steel

Tensile Strength(MPa)

Yield strength(MPa)

Elongation (%)

GB3087

10

335-475

195

24

20

410-550

245

20

ASTM A179

SA179

320

180

  35

 pressure boiler pipe

●Chemical composition: (%):

Standard

Steel

C

Si

Mn

P≤

S≤

Cu≤

Ni≤

Cr≤

Mo≤

V≤

GB3087

10

0.07-0.14

0.17-0.37

0.35-0.65

0.035

0.035

0.25

0.25

0.15

/

/

20

0.17-0.24

0.17-0.37

0.35-0.65

0.035

0.035

0.25

0.25

0.25

 

 

ASTM A179

SA179

0.06-0.18

≤0.25

0.27-0.63

0.035

0.035

/

/

/

/

/

 

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