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Supplier: Tapgroup internation.,JSC
Address: Số 32 Lô N4D, đường X2A, Yên Sở, Hoàng Mai, Hà Nội
Phone: 0084 933 86 77 86
Email: info@tapgroup.vn
Website: https://supplier-pipe-tube-ongthep.com
Insurance: 12 tháng
Status: Mới 100%
Origin: China, Korea, Malaysia, Thailand, Japan, EU, G7
Catalogue Profile
Name:  Ferritic Alloy-Steel Seamless Pipe for High-Temperature A335 Grade P23
Type Of Pipe Seamless Pipe  SMLS Pipe
Ferritic Alloy-Steel Seamless Pipe, A335 Grade P23 Ferritic Alloy Steel SMLS Pipe, A335 Grade P23
Seamless Pipe, A335 Grade P23  SMLS Pipe, A335 Grade P23
Standard Specification for
Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service
This standard is issued under the fixed designation A 335/A 335M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense
 Chemical Requirements
Grade UNS
Designation A 		Composition, %
Carbon Manganese Phosphorus,
max 		Sulfur,
max 		Silicon Chromium Molybdenum Others
P23 K41650 0.04–0.10 0.10–0.60 0.030 max 0.010 max 0.50 max 1.90–2.60 0.05–0.30 V 0.20–0.30
Cb 0.02–0.08
B 0.0010–0.006
N 0.015 max
Al 0.030 max
W 1.45–1.75
Ni 0.40 max
Ti 0.005–0.060
Ti/N ≥ 3.5C
Materials and Manufacture
Pipe may be either hot finished or cold drawn with the finishing treatment as required in Heat Treatment: All pipe shall be reheated for heat treatment and heat treated in accordance with the requirement. It is recommended that the temperature for tempering should be at least 100 °F [50 °C] above the intended service temperature; consequently, the purchaser should advise the manufacturer if the service temperature is to be over 1100 °F [600 °C]. Certain of the ferritic steels covered by this specification will harden if cooled rapidly from above their critical temperature. Some will
air harden, that is, become hardened to an undesirable degree when cooled in air from high temperatures. Therefore, operations involving heating
such steels above their critical temperatures, such as welding, flanging, and hot bending, should be followed by suitable heat treatment
Heat Treatment RequirementsA
Grade Heat Treat Type Normalizing
Temperature,
min or range °F [°C] 		Cooling Media Subcritical Annealing or
Tempering Temperature,
min or range°F [°C
P23 bình thường hóa và làm dịu 1900-1975 [1040-1080] làm mát nhanh hoặc để trong không khí 1350-1470 [730-800]
AWhere ellipses ({) appear in this table there is no requirement.
BAlternatively, Grade P36, Class 2 shall be cooled from the austenitizing temperature by accelerated cooling in air or by liquid quenching.
CExcept when Supplementary Requirement S7 is specified by the purchaser.
DWhen mutually agreed upon between the manufacturer and the purchaser, quenching and tempering shall be permitted for thicknesses greater than 3 in. [75 mm].
EAccelerated cooling from the normalizing temperature shall be permitted for section thicknesses greater than 3 in. [75 mm].
E91T1-B9. In addition, the sum of the Ni+Mn content of all welding consumables used to weld repair P91 shall not exceed 1.0 %. All repair welds in P92, P911, and P122, shall be made
using welding consumables meeting the chemical requirements for the grade  After weld repair, Grades P23, P91, P92, and P122 shall be heat treated at 1350-1470 ºF [730-800 ºC].
After weld repair, Grade P911 shall be heat treated at 1365-1435 ºF [740-780 ºC]. After weld repair, Grade P24 shall be heat treated at 1350-1420 °F [730-770 °C].
The finished pipe shall be reasonably straigh
Tensile Requirements
Grade
  P1, P2 P12 P23 P91 P92, P911 P122 All Others
Tensile strength, min              
ksi 55 60 74 85 90 90 60
Mpa 380 415 510 585 620 620 415
Yield strength, min              
ksi 30 32 50 60 64 58 30
Mpa 205 220 400 415 440 400 205
 Elongation Requirements
  Elongation Requirements
All grades except P23, P36, P91, P92, P122, and P911 P23, P24, P91, P92, P122, and P 911 P36
Longitudinal Transverse Longitudinal Transverse Longitudinal
Elongation in 2 in. or 50 mm, (or 4D), min, %:
Basic minimum elongation for wall 5⁄16 in. [8 mm] and
over in thickness, strip tests, and for all small sizes testedin full section 		30 20 20 …… 15
When standard round 2-in. or 50-mm gage length or
proportionally smaller size specimen with the gage
length equal to 4D (4 times the diameter) is used 		22 14 20 13 …..
For strip tests a deduction for each 1⁄32-in. [0.8 mm]
decrease in wall thickness below in. [8 mm] from the
basic minimum elongation of the following percentage
points shall be made 		1.50A 1.00A 1.00A … 1.00A
Calculated Minimum Elongation Values
Wall Thickness Elongation in 2 in. or 50 mm, min, %
All grades except P23, P36, P91, P92, P122, and P911 P23, P24, P91, P92, P122, and P911 P36
in. mm Longitudinal Transverse Longitudinal Longitudina
5⁄16(0.312) 8 30 20 20 15
9⁄32(0.281) 7.2 28 19 19 14
1⁄4 (0.250) 6.4 27 18 18 13
7⁄32(0.219) 5.6 26 … 17 12
3⁄16(0.188) 4.8 24 … 16 11
5⁄32(0.156) 4 22 … 15 10
1⁄8 (0.125) 3.2 21 … 14 9
3⁄32(0.094) 2.4 20 … 13 8
1⁄16(0.062) 1.6 18 … 12 7
Permissible Variations in Outside Diameter
NPS Designator Over Under
in. mm in. mm
1⁄8to 1 1/2, incl. 1⁄64(0.015) 0.40 1⁄64 (0.015) 0.40
Over 1 1⁄2to 4, incl. 1⁄32(0.031) 0.79 1⁄32 (0.031) 0.79
Over 4 to 8, incl. 1⁄16(0.062) 1.59 1⁄32 (0.031) 0.79
Over 8 to 12, incl. 3⁄32(0.093) 2.38 1⁄32 (0.031) 0.79
Over 12 1 % of the specified outside diameter
 Permitted Variations in Wall Thickness
NPS [DN] Designator Tolerance, % from Specified
Over Under
1⁄8to 2 1⁄2[6 to 65] incl., all t/D ratiosA 20.0 12.5
Above 2 1⁄2[65], t/D #5%A 22.5 12.5
Above 2 1⁄2[65], t/D > 5 %A 15.0 12.5
At = Specified Wall Thickness; D = Specified Outside Diameter.
Test Method Information for Certification and Marking
Hydrostatic Nondestructive Marking
YES NO Test Pressure
NO YES  NDE
NO NO NH
YES YES  Test Pressure/NDE
Wall Thickness: Welded and Seamless Wrought Steel Pipe, ANSI /ASME B36.10M
SCH 5 SCH 10 SCH 20 SCH 30 SCH STD SCH 40 SCH 60 SCH XS SCH 80 SCH 100
SCH 120 SCH 160 SCH XXS SCH XX.H
End of pipe end
Plain Ends (PE) The PE pipes will generally be used for the smaller diameters pipe systems and in combination with Slip On flanges and Socket Weld fittings and flanges.
Threaded Ends (TE) The TE implementation speaks for itself, this performance will generally used for small diameters pipe systems, and the connections will be made with threaded flanges and threaded fittings.
Beveled Ends (BE) The BE implementation is applied to all diameters of buttweld flanges or buttweld fittings, and will be directly welded (with a small gap 3-4 mm) to each other or to the pipe. Ends are mostly be beveled to angle 30° (+ 5° / -0°) with a root face of 1.6 mm (± 0.8 mm).
Grooved ends (example Victaulic pipes): these are pipes that allow a quick connection, used for non-critical applications
Threaded and coupled ends (T&C), generally used for gas distribution,
Threaded connections are the most common pipe fittings used in oil and gas transportation systems. Due to external vibrations, cyclic loads, and pollution, the fitting parts may start getting loose, which could result in pipeline leaks and other environmental disasters. It is of great significance to develop a reliable technique that could provide…
Type end : Plain Ends / Beveled Ends: Tubes – Pipe
• Bevel End (BE)
• Bevel Both Ends (BBE)
• Bevel Large End (BLE)
• Bevel One End (BOE)
• Bevel Small End (BSE)
• Bevel for Welding (BFW)
• Buttweld End (BE) 		• End of Pipe (EOP)
• Flange One End (FOE)
• Plain End (PE)
• Plain Both Ends (PBE)
• Plain One End (POE)
• Thread End (TE)
• Thread Both Ends (TBE) 		• Thread Large End (TLE)
• Thread One End (TOE)
• Thread Small End (TSE)
• Threads Only (TO)
• Threads per Inch (TP I)
 Plastic End Caps for Tubing and Pipe Ends 
Pipe End Caps Pipe End Plugs Threaded Pipe Caps Threaded Pipe Plugs
Standard: Pipe of Tube
The American Society Of Mechanical Engineers American National Standards Institute
ASME B36.19M ANSI B36.19M
ASME B36.10M ANSI B36.10M
Product related keywords
Ferritic Alloy-Steel Seamless Pipe for High-Temperature A335 Grade P23
Seamless Pipe SMLS Pipe
Seamless Pipe A335 Grade P23 SMLS Pipe A335 Grade P23
Seamless Pipe A335 Grade P23, SCH 5 Seamless Pipe A335 Grade P23, SCH 10
Seamless Pipe A335 Grade P23, SCH 20 Seamless Pipe A335 Grade P23, SCH 30
Seamless Pipe A335 Grade P23, SCH STD Seamless Pipe A335 Grade P23, SCH 40
Seamless Pipe A335 Grade P23, SCH 60 Seamless Pipe A335 Grade P23, SCH XS
Seamless Pipe A335 Grade P23, SCH 80 Seamless Pipe A335 Grade P23, SCH 100
Seamless Pipe A335 Grade P23, SCH 120 Seamless Pipe A335 Grade P23, SCH 160
Seamless Pipe A335 Grade P23, SCH XXS Seamless Pipe A335 Grade P23, SCH XX.H
Dimensions of Steel Pipes ASME B36.10 and B36.19
Ferritic Alloy-Steel Seamless Pipe for High-Temperature A335 Grade P23
1/2 inches  to 2 inches 
NPS 1/2" 3/4" 1" 1¼" 1½" 2"
OD 21.3 26.7 33.4 42.2 48.3 60.3
  Wall Thickness
Sch 5 1.65 1.65 1.65 1.65 1.65 1.65
Sch 5S 1.65 1.65 1.65 1.65 1.65 1.65
Sch 10 2.11 2.11 2.77 2.77 2.77 2.77
Sch 10S 2.11 2.11 2.77 2.77 2.77 2.77
Sch 20 – … – … – …
Sch 30 2.41 2.41 2.90 2.97 3.18 3.18
STD 2.77 2.87 3.38 3.56 3.68 3.91
Sch 40 2.77 2.87 3.38 3.56 3.68 3.91
Sch 40S 2.77 2.87 3.38 3.56 3.68 3.91
Sch 60 – … – … – …
XS 3.73 3.91 4.55 4.85 5.08 5.54
Sch 80 3.73 3.91 4.55 4.85 5.08 5.54
Sch 80S 3.73 3.91 4.55 4.85 5.08 5.54
Sch 100 – … – … – …
Sch 120 – … – … – …
Sch 140 – … – … – …
XXS 7.47 7.82 9.09 9.70 10.15 11.07
Sch 160 4.78 5.56 6.35 6.35 7.14 8.74
NPS = Nominal Pipe Size   O.D. = Outside Diameter
Dimensions are in millimeters unless otherwise indicated.
DIMENSIONAL TOLERANCES FOR SEAMLESS AND WELDED PIPES ASTM A530
Nominal pipe size
up to 4 = ± 0.79 mm | 5 thru 8 = + 1.58 mm / – 0.79 mm
10 thru 18 = + 2.37 mm / – 0.79 mm | 20 thru 24 = + 3.18 mm / – 0.79 mm
Wall Thickness Length Weight
All Diameters = – 12.5% + 6.40 mm / – 0 mm Weight = + 10% / – 1.5%
2 1/2  inches  to 5 inches 
NPS 2½" 3" 3½" 4" 5"
OD 73 88.9 101.6 114.3 141.3
  Wall Thickness
Sch 5 2.11 2.11 2.11 2.11 2.77
Sch 5S 2.11 2.11 2.11 2.11 2.77
Sch 10 3.05 3.05 3.05 3.05 3.40
Sch 10S 3.05 3.05 3.05 3.05 3.40
Sch 20   …     …
Sch 30 4.78 4.78 4.78 4.78 …
STD 5.16 5.49 5.74 6.02 6.55
Sch 40 5.16 5.49 5.74 6.02 6.55
Sch 40S 5.16 5.49 5.74 6.02 6.55
Sch 60   …     …
XS 7.01 7.62 8.08 8.56 9.53
Sch 80 7.01 7.62 8.08 8.56 9.53
Sch 80S 7.01 7.62 8.08 8.56 9.53
Sch 100   …     …
Sch 120   …   11.13 12.7
Sch 140   …     …
XXS 14.02 15.24   17.12 19.05
Sch 160 9.53 11.13   13.49 15.88
NPS = Nominal Pipe Size   O.D. = Outside Diameter
Dimensions are in millimeters unless otherwise indicated.
DIMENSIONAL TOLERANCES FOR SEAMLESS AND WELDED PIPES ASTM A530
Nominal pipe size
up to 4 = ± 0.79 mm | 5 thru 8 = + 1.58 mm / – 0.79 mm
10 thru 18 = + 2.37 mm / – 0.79 mm | 20 thru 24 = + 3.18 mm / – 0.79 mm
Wall Thickness Length Weight
All Diameters = – 12.5% + 6.40 mm / – 0 mm Weight = + 10% / – 1.5%
6 inches  to 14 inches 
NPS 6" 8" 10" 12" 14"
OD 168.3 219 273 323.9 355.6
  Wall Thickness
Sch 5 2.77 2.77 3.40 3.96 3.96
Sch 5S 2.77 2.77 3.40 3.96 3.96
Sch 10 3.40 3.76 4.19 4.57 6.35
Sch 10S 3.40 3.76 4.19 4.57 4.78
Sch 20   6.35 6.35 6.35 7.92
Sch 30   7.04 7.80 8.38 9.53
STD 7.11 8.18 9.27 9.53 9.53
Sch 40 7.11 8.18 9.27 10.31 11.13
Sch 40S 7.11 8.18 9.27 9.53 9.53
Sch 60   10.31 12.70 14.27 15.06
XS 10.97 12.70 12.70 12.70 12.70
Sch 80 10.97 12.70 15.09 17.48 19.05
Sch 80S 10.97 12.70 12.70 12.70 12.70
Sch 100   15.09 18.26 21.44 23.83
Sch 120 14.27 18.26 21.44 25.40 27.79
Sch 140   20.62 25.40 28.58 31.75
XXS 21.95 22.23 25.40 25.40  
Sch 160 18.26 23.01 28.58 33.32 35.71
NPS = Nominal Pipe Size   O.D. = Outside Diameter
Dimensions are in millimeters unless otherwise indicated.
DIMENSIONAL TOLERANCES FOR SEAMLESS AND WELDED PIPES ASTM A530
Nominal pipe size
up to 4 = ± 0.79 mm | 5 thru 8 = + 1.58 mm / – 0.79 mm
10 thru 18 = + 2.37 mm / – 0.79 mm | 20 thru 24 = + 3.18 mm / – 0.79 mm
Wall Thickness Length Weight
All Diameters = – 12.5% + 6.40 mm / – 0 mm Weight = + 10% / – 1.5%
16 inches to 24 inches 
NPS 16" 18" 20" 22" 24"
OD 406.04 457.2 508 558.8 609.6
  Wall Thickness
Sch 5 4.19 4.19 4.78 4.78 5.54
Sch 5S 4.19 4.19 4.78 4.78 5.54
Sch 10 6.35 6.35 6.35 6.35 6.35
Sch 10S 4.78 4.78 5.54 5.54 6.35
Sch 20 7.92 7.92 9.53 9.53 9.53
Sch 30 9.53 11.13 12.70 12.70 14.27
STD 9.53 9.53 9.53 9.53 9.53
Sch 40 12.70 14.27 15.09 … 17.48
Sch 40S 9.53 9.53 9.53 … 9.53
Sch 60 16.66 19.05 20.62 22.23 24.61
XS 12.70 12.70 12.70 12.70 12.70
Sch 80 21.44 23.83 26.19 28.58 30.96
Sch 80S 12.70 12.70 12.70 … 12.70
Sch 100 26.19 29.36 32.54 34.93 38.89
Sch 120 30.96 34.93 38.10 41.28 46.02
Sch 140 36.53 39.67 44.45 47.63 52.37
XXS   …   …  
Sch 160 40.49 45.24 50.01 53.98 59.54
NPS = Nominal Pipe Size   O.D. = Outside Diameter
Dimensions are in millimeters unless otherwise indicated.
DIMENSIONAL TOLERANCES FOR SEAMLESS AND WELDED PIPES ASTM A530
Nominal pipe size
up to 4 = ± 0.79 mm | 5 thru 8 = + 1.58 mm / – 0.79 mm
10 thru 18 = + 2.37 mm / – 0.79 mm | 20 thru 24 = + 3.18 mm / – 0.79 mm
Wall Thickness Length Weight
All Diameters = – 12.5% + 6.40 mm / – 0 mm Weight = + 10% / – 1.5%
26 inches to 48 inches 
26" > 48" Wall Thickness and Weight
NPS OD   5 5S 10
26 660 wt     7.92
kg/m 127.36
28 711 wt     7.92
kg/m 137.32
30 762 wt 6.35 6.35 7.92
kg/m 118.34 118.31 147.29
32 813 wt     7.92
kg/m 157.25
34 864 wt     7.92
kg/m 167.21
36 914 wt     7.92
kg/m 176.97
38 965 wt      
kg/m
40 1016 wt      
kg/m
42 1067 wt      
kg/m
44 1118 wt      
kg/m
46 1168 wt      
kg/m
48 1219 wt      
kg/m
26 – 48 Wall Thickness and Weight
NPS OD   10S 20 30
26 660 wt   12.70  
kg/m 202.74
28 711 wt   12.70 15.88
kg/m 218.71 272.23
30 762 wt 7.92 12.70 15.88
kg/m 132.91 234.68 292.20
32 813 wt   12.70 15.88
kg/m 250.65 312.17
34 864 wt   12.70 15.88
kg/m 266.63 332.14
36 914 wt   12.70 15.88
kg/m 282.29 351.73
38 965 wt      
kg/m
40 1016 wt      
kg/m
42 1067 wt      
kg/m
44 1118 wt      
kg/m
46 1168 wt      
kg/m
48 1219 wt      
kg/m
26 – 48 Wall Thickness and Weight
NPS OD   STD 40 XS
26 660 wt 9.53   12.70
kg/m 152.88 202.74
28 711 wt 9.53   12.70
kg/m 164.86 218.71
30 762 wt 9.53   12.70
kg/m 176.85 234.68
32 813 wt 9.53 17.48 12.70
kg/m 188.83 342.94 250.65
34 864 wt 9.53 17.48 12.70
kg/m 200.82 364.92 266.63
36 914 wt 9.53 19.05 12.70
kg/m 212.57 420.45 282.29
38 965 wt 9.53   12.70
kg/m 224.56 298.26
40 1016 wt 9.53   12.70
kg/m 236.54 314.23
42 1067 wt 9.53   12.70
kg/m 248.53 330.21
44 1118 wt 9.53   12.70
kg/m 260.52 346.18
46 1168 wt 9.53   12.70
kg/m 272.70 361.84
48 1219 wt 9.53   12.70
kg/m 284.25 377.81
NPS = Nominal Pipe Size
O.D. = Outside Diameter
WT = Walltickness
KG/M = Kilogram per meter
Dimensions are in millimeters unless otherwise indicated
Weights are in kilograms p/meter and approximately given
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