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Alloy Pressure Pipe

Product

High Temperature Alloy Steel Tube, Alloy Pressure Pipe

Application

In Petroleum, Aerospace, Chemical, Power, Boilers, Military Industry

Pipe Standard

ASTM A335/A213/A209/ASME SA335/SA213/SA209/DIN17175/JIS G3462

Size

OD: 1/8'' - 26''

WT: SCH 10, 30, 40, 60, 80, 120, 140, 160, XS, XXS, STD

Length: Single Random, Double Random, Cut Length


High Temperature service Alloy Steel tube are known as Chrome Moly pipe.

ASTM A213, A209 specification covers Alloy Steel Seamless tube for high temperature service. These tube are suitable for bending and similar forming operations, and for fusion welding at high temperatures. High Temperature Alloy Steel tube are also considered as low Alloy Chrome Moly grades.

ASTM/ASME A/SA213 Gr. T2, T11, T12, T22, T91, T92

ASTM/ASME A/SA335 Gr. P1, P2, P5, P11, P12, P22

ASTM/ASME A/SA209 T1, T1a, T1b

ASTM A213 tubing has been widely used in high temperature services especially for the boiler and superheater. Tube material could be in alloy steel and stainless steel, and manufactured in seamless of hot rolled or cold drawn. Common grades are T9, T11, T12, T21, T22, T91 and stainless grades in TP304 or TP316.

The A335 pipes are generally called chrome moly pipe, it is a type of seamless pipe could be used in high temperature environments of 540 – 750 °C, they have a high level of Chromium and Molybdenum presence in it,  While Molybdenum increases the overall strength, resistance, elasticity, hardenability and overall quality, moly ensures that the material is more resistant to softening, restrains the growth of grains and lessens the chances of embrittlement. It is the single additive that is responsible for the increase in high temperature resistance and it also improves the corrosion resistance to steel.

This chrome moly pipe featured grades are ASTM A335 P9, P11, P22, P91, so also it could be called as P Grade pipe in some cases.

P11 pipe, P22 pipe and P91 pipes are used in power industry and petro-chemical plants, meanwhile, P5 and P9 pipe generally find usage in refineries.

ASTM A209 / A209M, ASME SA209 T1, T1a, T1b is the standard applicable to seamless carbon-Molybdenum Alloy-Steel Boiler and Superheater Tubes.


ASTM A213 Alloy Steel Chemical Composition(%, max)

Steel Grade

Chemical Composition%

C

Si

Mn

P, S Max

Cr

Mo

Ni Max

V

Al Max

W

B

Nb

N

T2

0.10~0.20

0.10~0.30

0.30~0.61

0.025

0.50~0.81

0.44~0.65

T11

0.05~0.15

0.50~1.00

0.30~0.60

0.025

1.00~1.50

0.44~0.65

T12

0.05~0.15

Max 0.5

0.30~0.61

0.025

0.80~1.25

0.44~0.65

T22

0.05~0.15

Max 0.5

0.30~0.60

0.025

1.90~2.60

0.87~1.13

T91

0.07~0.14

0.20~0.50

0.30~0.60

0.02

8.0~9.5

0.85~1.05

0.4

0.18~0.25

0.015

0.06~0.10

0.03~0.07

T92

0.07~0.13

Max 0.5

0.30~0.60

0.02

8.5~9.5

0.30~0.60

0.4

0.15~0.25

0.015

1.50~2.00

0.001~0.006



ASTM A213 Alloy Steel Mechanical properties:

Steel Grade

Mechanical Properties

T. S

Y. P

Elongation

Hardness

T2

≥ 415MPa

≥ 205MPa

≥ 30%

163HBW(85HRB)

T11

≥ 415MPa

≥ 205MPa

≥ 30%

163HBW(85HRB)

T12

≥ 415MPa

≥ 220MPa

≥ 30%

163HBW(85HRB)

T22

≥ 415MPa

≥ 205MPa

≥ 30%

163HBW(85HRB)

T91

≥ 585MPa

≥ 415MPa

≥ 20%

250HBW(25HRB)

T92

≥ 620MPa

≥ 440MPa

≥ 20%

250HBW(25HRB)

 

ASTM A213 Steel Tubes Outside Diameter and Wall Thickness Tolerance

OD, mm

OD Tolerance

< 25.4

+/- 0.10

25.4 – <= 38.1

+/- 0.15

> 38.1 -< 50.8

+/- 0.20

50.8 -< 63.5

+/- 0.25

63.5 -< 76.2

+/- 0.30

76.2 – <= 101.6

+/- 0.38

> 101.6 – <= 190.5

+0.38/-0.64

> 190.5 – <= 228.6

+0.38/-1.14

 

OD, mm

WT Tolerance

<= 38.1

+20%/-0

> 38.1

+22%/-0

 

ASTM A209 Alloy Steel Chemical Composition

Chemical Components (%)

Grade

C

Mn

P

S

Si

Mo

T1

0.10-0.20

0.30-0.80

≤0.025

≤0.025

0.10-0.50

0.44-0.65

T1a

0.15-0.25

0.30-0.80

≤0.025

≤0.025

0.10-0.50

0.44-0.65

T1b

0.14 max

0.30-0.80

≤0.025

≤0.025

0.10-0.50

0.44-0.65

 

ASTM A209 Alloy Steel Mechanical properties:

Grade

Tensile

Yield

Elongation

Hardness

Strength (Mpa)

Strength (Mpa)

(%)

(HRB)

T1

≥380

≥205

≥30

≤80

T1a

≥365

≥195

≥30

≤81

T1b

≥415

≥220

≥30

≤77

 

Outside Diameter & Tolerance :

Hot rolled

Outside Diameter, mm

Tolerance, mm

OD≤101.6

+0.4/-0.8

101.6OD≤190.5

+0.4/-1.2

190.5OD≤228.6

+0.4/-1.6

Cold Drawn

Outside Diameter, mm

Tolerance, mm

OD25.4

±0.10

25.4≤OD≤38.1

±0.15

38.1OD50.8

±0.20

50.8≤OD63.5

±0.25

63.5≤OD76.2

±0.30

76.2≤OD≤101.6

±0.38

101.6OD≤190.5

+0.38/-0.64

190.5OD≤228.6

+0.38/-1.14

 

Wall thickness & Tolerance :

Hot rolled

Outside Diameter, mm

Tolerance, %

OD≤101.6, WT≤2.4

+40/-0

OD≤101.6, 2.4WT≤3.8

+35/-0

OD≤101.6, 3.8WT≤4.6

+33/-0

OD≤101.6, WT>4.6

+28/-0

OD>101.6, 2.4WT≤3.8

+35/-0

OD>101.6, 3.8WT≤4.6

+33/-0

OD>101.6, WT>4.6

+28/-0

Cold Drawn

Outside Diameter, mm

Tolerance, %

OD≤38.1

+20/-0

OD>38.1

+22/-0

Chemical Requirements of A335 Alloy Steel Seamless Pipes

Grade

UNS

C≤

Mn

P≤

S≤

Si≤

Cr

Mo

P1

K11522

0.10~0.20

0.30~0.80

0.025

0.025

0.10~0.50

-

0.44~0.65

P2

K11547

0.10~0.20

0.30~0.61

0.025

0.025

0.10~0.30

0.50~0.81

0.44~0.65

P5

K41545

0.15

0.30~0.60

0.025

0.025

0.50

4.00~6.00

0.44~0.65

P5b

K51545

0.15

0.30~0.60

0.025

0.025

1.00~2.00

4.00~6.00

0.44~0.65

P5c

K41245

0.12

0.30~0.60

0.025

0.025

0.50

4.00~6.00

0.44~0.65

P9

S50400

0.15

0.30~0.60

0.025

0.025

0.50~1.00

8.00~10.00

0.44~0.65

P11

K11597

0.05~0.15

0.30~0.61

0.025

0.025

0.50~1.00

1.00~1.50

0.44~0.65

P12

K11562

0.05~0.15

0.30~0.60

0.025

0.025

0.50

0.80~1.25

0.44~0.65

P15

K11578

0.05~0.15

0.30~0.60

0.025

0.025

1.15~1.65

-

0.44~0.65

P21

K31545

0.05~0.15

0.30~0.60

0.025

0.025

0.50

2.65~3.35

0.80~1.60

P22

K21590

0.05~0.15

0.30~0.60

0.025

0.025

0.50

1.90~2.60

0.87~1.13

P91

K91560

0.08~0.12

0.30~0.60

0.020

0.010

0.20~0.50

8.00~9.50

0.85~1.05

P92

K92460

0.07~0.13

0.30~0.60

0.020

0.010

0.50

8.50~9.50

0.30~0.60

 

 

Tensile Requirements of A335 Alloy Steel Seamless Pipes


Seamless


P-5

P-9

P-11

P-22

P-91

Tensile Strength, min., psi






ksi

60

60

60

60

85

MPa

415

415

415

415

585

Yield Strength, min., psi






ksi

30

30

30

30

60

MPa

205

205

205

205

415

 

Tolerance for ASTM A335/ASME SA 335 P5, P9, P11, P22, P91 Seamless Pipes

NPS

OD Tolerance

NPS

WT Tolerance

1/8" ≤ NPS ≤ 1 1/2"

+/- 0.4

1/8" ≤ NPS ≤ 2 1/2" , All T/D ratios.

+20%, -12.5%

1 1/2 < NPS ≤ 4"

+/- 0.79

NPS ≥ 2 1/2" , T/D ≤ 5%

+22.5%, -12.5%

4" < NPS ≤ 8"

+1.59, -0.79

NPS ≥ 2 1/2" , T/D > 5%

+15%, -12.5%

8" < NPS ≤ 12"

+2.38, -0.79

(T= Specified Wall Thickness; D = Specified Outside Diameter)

NPS > 12"

+/- 1%

 


A335

Standard Specification for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service

A213

Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes

A209

Standard Specification for Seamless Carbon-Molybdenum Alloy-Steel Boiler and Super heater Tubes


alloy steel pipe processing


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