ASTM A335 Tube

Short Description:

Type: Seamless steel pipe, alloy seamless steel pipe
Specification: OD:1/2″ – 30″, Schedules: 20, 30, 40, STD, 60, XS, 80, 100, 120, 140, 160, XXS. Length: 6m, 12m or customized.
Standard: ASTM A335, ASME SA335
Grades: GR P5, P9, P11, P12, P22, P91, P92.
End: Plain Ends, Beveled Ends, threaded Ends, Coupling
Surface: Oiled, Black painted to prevent rust, polished, varnished, 3PE, FBE

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What is ASTM A335 Steel Pipe?

ASTM A335 steel pipe (or ASME SA335 steel pipe) is the standard specification for seamless ferritic alloy steel pipe for high-temperature service. It covers steel grades from P1 to P5, P9, P11, P12, P91. Grades P11/P22 and P91/92 pipes are commonly used in power generation and petrochemical industries. ASTM A335 grade P5 and P9 pipes are mostly used for application in the petrochemical industry. Not only to power generation and petrochemical industries, it is also applied to gas processing equipment, oil serves, heaters/reheat lines, and boilers.

Features of ASTM A335 Steel Pipe

● Strong resistance to rupturing at high temperatures and high pressures
● May be used for Hydrogen Sulfide Corrosion Services
● Resistant to cracking from hydrogen attack and embrittlement
● Resistant to hot sulfide corrosion cracking
● Can be used for NACE Applications where sour environments are under high temp and pressure
● Can be used in NACE-MRO 175 Sour Service
● Ideal for creep rupture applications
● Can handle high temperatures with very low elasticity

Chemical And Mechanical Properties of ASTM A335 Steel Pipe

Material	C	Si	Mn	P	S	Mo	Cr
	%	%	%	%	Max	%	%
A335 Grade P1	0.10---0.20	0.10---0.50	0.30---0.80	0.025	0.025	0.44-0.65	/
A335 Grade P5	Max 0.15	Max 0.50	0.30---0.60	0.025	0.025	0.45-0.65	4.00-6.00
A335 Grade P9	Max 0.15	0.25-1.00	0.30---0.60	0.025	0.025	0.90-1.10	8.00-10.00
A335 Grade P11	0.05---0.15	0.5---1.0	0.30---0.60	0.025	0.025	0.45-0.65	1.00-1.50
A335 Grade P12	0.05---0.15	Max 0.50	0.30---0.61	0.025	0.025	0.45-0.65	0.80-1.25
A335 Grade P22	0.05---0.15	Max 0.50	0.30---0.60	0.025	0.025	0.87-1.13	1.90-2.60
A335 Grade P91	0.08-0.12	0.20-0.50	0.30---0.60	0.020	0.010	0.85-1.05	8.00-9.50
A335 Grade P92	0.07-0.13	Max 0.50	0.30---0.60	0.020	0.010	0.30-0.60	8.50-9.50

Mechanical Property	P1,P2	P12	P91	P92	P122	Others
Tensile strength ksi	55	60	85	90	90	60
Tensile strength mpa	380	415	585	620	620	415
Yield strength ksi	30	32	60	64	58	30
Yield strength mpa	205	220	415	440	400	205

Calculated minimum elongation values
Elongation in 2in or 50mm, min%
Wall thickness		P5,P9,P11,P22		P91
in	mm	Longitudinal	Transverse	Longitudinal
5/16 (0.312)	8	30	20	20
9/32 (0.281)	7.2	28	19	19
1/4 (0.250)	6.4	27	18	18
7/32 (0.219)	5.6	26	/	17
3/16 (0.188)	4.8	24	/	16
5/32 (0.156)	4	22	/	15
7/8 (0.125)	3.2	21	/	14
3/32 (0.094)	2.4	20	/	13
1/18 (0.062)	1.6	18	/	12
5/16 (0.312)	8	30	20	20

NPS(DN) Designator	Over		Under
NPS(DN) Designator	in	mm	in	mm
1/8 to 1 1/2 [6 to 40], incl.	1/64 (0.015)	0.40	1/64 (0.015)	0.40
Over 1 1/2 to 4 [40 to 100], incl.	1/32 (0.031)	0.79	1/32 (0.031)	0.79
Over 4 to 8 [100 to 200], incl.	1/16 (0.062)	1.59	1/32 (0.031)	0.79
Over 8 to 12 [200 to 300], incl.	3/32 (0.093)	2.38	1/32 (0.031)	0.79
Over 12 (300)	+/-1% of the specified outer diameter

NPS(DN) Designator	Tolerance, % from Specified
1/8 to 2 1/2 [6 to 65] incl., all t/D ratios	20.0%	12.5%
Above 2 1/2 [65], t/D < or = 5%	22.5%	12.5%
Above 2 1/2 [65], t/D > 5%	15.0%	12.5%
1/8 to 2 1/2 [6 to 65] incl., all t/D ratios	20.0%	12.5%
(t = Specified Wall Thickness; D = Specified Outside Diameter)

ASTM A335 Steel Pipe Grade	Heat Treatment Type	Normalizing Temperature Range F [C]	Subcritical Annealing or Tempering Temperature Range F [C]
P5	Full or Isothermal Anneal
P5 b	Normalize and Temper	-	1250 [675]
P5 c	Subcritical Anneal (P5c only)	-	1325 - 1375 [715 - 745]
P9	Full or Isothermal Anneal
P9	Normalize and Temper	-	1250 [675]
P11	Full or Isothermal Anneal
P11	Normalize and Temper	-	1200 [650]
P22	Full or Isothermal Anneal
P22	Normalize and Temper	-	1250 [675]
P91	Normalize and Temper	1900-1975 [1040 - 1080]	1350-1470 [730 - 800]
P91	Quench and Temper	1900-1975 [1040 - 1080]	1350-1470 [730 - 800]

Inspection And Test Performed of ASTM A335 Steel Pipe

Chemical composition inspection, mechanical properties test ( Tensile strength, yield strength, elongation,Flattening, Hardness, or bend test) Surface and dimension test, Non-destructive test, Hydrostatic Test.

Packing and Delivery of ASTM A335 Steel Pipe

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Size Chart of ASTM A335 Steel Pipe

Diameter of ASTM A335 Steel Pipe

A335 Steel Pipe	Over		Under
NPS [DN]	in.	mm	in.	mm
1/8 to 1 1/2 / DN 6 to 40	1/64 (0.015)	0.4	1/64 (0.015)	0.4
Over 1 1/2 to 4 / DN 40 to 100	1/32 (0.031)	0.79	1/32 (0.031)	0.79
Over 4 to 8 / DN 100 to 200	1/16 (0.062)	1.59	1/32 (0.031)	0.79
Over 8 to 12 / DN 200 to 300	3/32 (0.093)	2.38	1/32 (0.031)	0.79
Over 12 / > DN 300	+/- 1% of the specified outside diameter

Wall Thickness of ASTM A335 Steel Pipe

The tolerances in WT, in %, from specified are:

1/8 to 2 1/2 [6 to 65] incl., all t/D ratios: over 20%, under 12.5%
Above 2 1/2 [65], t/D < or = 5%: over 22.5%, under 12.5%
Above 2 1/2 [65], t/D > 5%: over 15%, under 12.5%

t = Specified Wall Thickness; D = Specified Outside Diameter)

Application of ASTM A335 Steel Pipe

- Refinery
- Machine building
- Oil and gas
- Power generation
- Gas processing
- Fertilizer
- Sugar
- Gas processing equipment
- Oil serves
- Heaters/reheat lines
- Boilers
- Power generation
- Petrochemical industries

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