Descripción
An Alloy Steel Seamless Pipe's working pressure capability is around 20% higher than a welded pipe, similar to most alloys. As a result, the use of a seamless pipe is justified in applications that require a higher working pressure. The cost is substantially more than a welded pipe, despite the fact that it is stronger. Alloy Steel Seamless Pipes & Tubes are utilised in applications that demand moderate corrosion resistance, as well as good durability and a low cost.
Alloy Steel Seamless Tube Application
- Offshore Oil Drilling
- Power Generation
- Petrochemicals
- Gas Processing
- Specialty Chemicals
- Pharmaceuticals
- Pharmaceutical Equipment
- Chemical Equipment
- Sea Water Equipment
- Heat Exchangers
- Condensers
- Pulp and Paper Industry
Especificación
Chemical Composition
|
C, %
|
Mn, %
|
P, %
|
S, %
|
Si, %
|
Cr, %
|
Mo, %
|
|
0.05-0.15
|
0.30-0.60
|
0.025 max
|
0.025 max
|
0.50-1.00
|
1.00-1.50
|
0.44-0.65
|
Mechanical Properties
|
Tensile Strength, MPa
|
Yield Strength, MPa
|
Elongation, %
|
|
415 min
|
205 min
|
30 min
|
Outside Diameter & Tolerance
|
ASTM A450
|
Hot rolled
|
Outside Diameter, mm
|
Tolerance, mm
|
|
OD≤101.6
|
+0.4/-0.8
|
|
101.6＜OD≤190.5
|
+0.4/-1.2
|
|
190.5＜OD≤228.6
|
+0.4/-1.6
|
|
Cold Drawn
|
Outside Diameter, mm
|
Tolerance, mm
|
|
OD＜25.4
|
±0.10
|
|
25.4≤OD≤38.1
|
±0.15
|
|
38.1＜OD＜50.8
|
±0.20
|
|
50.8≤OD＜63.5
|
±0.25
|
|
63.5≤OD＜76.2
|
±0.30
|
|
76.2≤OD≤101.6
|
±0.38
|
|
101.6＜OD≤190.5
|
+0.38/-0.64
|
|
190.5＜OD≤228.6
|
+0.38/-1.14
|
|
ASTM A530 & ASTM A335
|
NPS
|
Outside Diameter, inch
|
Tolerance, mm
|
|
1/8≤OD≤1-1/2
|
±0.40
|
|
1-1/2＜OD≤4
|
±0.79
|
|
4＜OD≤8
|
+1.59/-0.79
|
|
8＜OD≤12
|
+2.38/-0.79
|
|
OD>12
|
±1%
|
Wall Thickness & Tolerance
|
ASTM A450
|
Hot rolled
|
Outside Diameter, mm
|
Tolerance, %
|
|
OD≤101.6, WT≤2.4
|
+40/-0
|
|
OD≤101.6, 2.4＜WT≤3.8
|
+35/-0
|
|
OD≤101.6, 3.8＜WT≤4.6
|
+33/-0
|
|
OD≤101.6, WT>4.6
|
+28/-0
|
|
OD>101.6, 2.4＜WT≤3.8
|
+35/-0
|
|
OD>101.6, 3.8＜WT≤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
|
|
ASTM A530
|
NPS
|
Outside Diameter, inch
|
Tolerance, %
|
|
1/8≤OD≤2-1/2
|
+20.0/-12.5
|
|
3≤OD≤18, WT/OD≤5%
|
+22.5/-12.5
|
|
3≤OD≤18, WT/OD>5%
|
+15.0/-12.5
|
|
OD≥20, WT/OD≤5%
|
+22.5/-12.5
|
|
OD≥20, WT/OD>5%
|
+15.0/-12.5
|
Estándar
ASTM A335–for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service
ASTM A519–for Seamless Carbon and Alloy Steel Mechanical Tubing
ASTM A213–for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Super heater, and Heat-Exchange Tubes
ASTM ASME (S)A-335/(S)A-335M Grade and Chemical Composition
|
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
|
Note:
A335 P91 other chemical composition are : V 0.18~0.25; N 0.030~0.070; Ni ≤ 0.40; Al ≤ 0.04 ; Nb 0.06~0.10
A335 P92 other chemical composition are : V 0.15~0.25; N 0.030~0.070; Ni ≤ 0.40; Al ≤ 0.04 ; Nb 0.04~0.09; W 1.5~2.00 ; B 0.001~0.006
Proceso
Pipe Process of ASME SA335 P91 Steel Tube / ASTM A335 P91 Alloy Steel Seamless Tubes:
Round Billet → Material Inspection → Grinding → Cut to Length → Heating → Piercing → Bite Mandrel → Hot Rolled → Get Rid of Mandrel → Heat Treatment → Size Reducing → Cooling → Straightening → Semi Manufactured Product → Corp End Cutting off → UT/ET TEST or Hydrostatic Test → Marking → Packing → Warehousing
Embalaje
Estándar
ASTM A335–for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service
ASTM A519–for Seamless Carbon and Alloy Steel Mechanical Tubing
ASTM A213–for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Super heater, and Heat-Exchange Tubes
ASTM ASME (S)A-335/(S)A-335M Grade and Chemical Composition
|
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
|
Note:
A335 P91 other chemical composition are : V 0.18~0.25; N 0.030~0.070; Ni ≤ 0.40; Al ≤ 0.04 ; Nb 0.06~0.10
A335 P92 other chemical composition are : V 0.15~0.25; N 0.030~0.070; Ni ≤ 0.40; Al ≤ 0.04 ; Nb 0.04~0.09; W 1.5~2.00 ; B 0.001~0.006
Proceso
Pipe Process of ASME SA335 P91 Steel Tube / ASTM A335 P91 Alloy Steel Seamless Tubes:
Round Billet → Material Inspection → Grinding → Cut to Length → Heating → Piercing → Bite Mandrel → Hot Rolled → Get Rid of Mandrel → Heat Treatment → Size Reducing → Cooling → Straightening → Semi Manufactured Product → Corp End Cutting off → UT/ET TEST or Hydrostatic Test → Marking → Packing → Warehousing
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