4 Line Pipe Standards Similar to API 5L Specification

Everyone in steel pipe industry must know API 5L Specification, which is standard for steel pipe for pipeline transportation systems in petroleum and natural gas industries. There are some other similar line pipe standard you may not know. Here we list 4 Line Pipe Standard similar to API 5L specification.

#1 CSA Z245.1-2007 – [Canadian Standard]

1.1 Scope For CSA Z 245.1 Line Pipe Standard

This Line Pipe Standard covers seamless pipe, electric-welded pipe (flash-welded pipe and low-frequency electric-welded pipe excluded) and submerged-arc-welded pipe primarily intended for use in oil or gas pipeline systems. which is very similar to API 5L’s scope.

1.2 Pipe Manufacturing Process

• For submerged-arc-welded pipe, at least two weld passes shall be used, with at least one pass made from the inside and at least one pass made from the outside.
• Unless otherwise specified in the purchase order, the manufacturer shall have the option of making the pipe nonexpanded or cold-expanded.
• Heat-treated pipe shall be identified

1.3 Steel Grade Mechanical Properties

Grade	Yield strength (Y), MPa		Tensile strength (T), MPa		Y/T, Maximum*
	Minimum	Maximum	Minimum	Maximum	Flattened strap specimen	Other than flattened strap specimen
241	241	495	414	760	0.93	0.93
290	290	495	414	760	0.93	0.93
359	359	530	455	760	0.93	0.93
386	386	540	490	760	0.93	0.93
414	414	565	517	760	0.93	0.93
448	448	600	531	760	0.93	0.93
483	483	620	565	760	0.93	0.93
550	550	690	620	830	0.93	0.93
620	620	760	690	900	0.93	0.95
690	690	825	760	970	0.93	0.97
825	825	1050	915	1145	0.99	0.99

1.4 Steel grade chemical properties for csa z245.1 line pipe standard

Grades	Carbon equivalent*, maximum, %
All	0.4
Element	Maximum permitted, %
Carbon	0.26
Manganese	2
Phosphorus	0.03
Sulphur	0.035
Silicon	0.5
Niobium	0.11
Titanium	0.11
Vanadium	0.11
Boron	0.001

1.5 Tolerance on dimension, mass, length For CSA Z245.1 Line Pipe Standard

1.5.1 Thickness Tolerance

Tolerances on wall thickness
Specified outside diameter, mm	Specified wall thickness, mm	Type of pipe	thickness, %*
73.0 or smaller	Any	Any	+20.0, –12.5
Larger than 73.0 but smaller than 101.6	Any	Any	+18.0, –12.5
101.6 to 457	Any	Any	+15.0, –12.5
Larger than 457	Any	Seamless	+17.5, –10.0
Larger than 457	9.5 or less	Welded	+17.0, –8.0
Larger than 457	9.6 to 12.6	Welded	+15.0, –8.0
Larger than 457	12.7 or greater	Welded	+12.0, –8.0

1.5.2 Tolerance on pipe length

Specified lengths in entire shipment, m
Nominal length, m	Minimum		Minimum average		Maximum
6	4		5		8
12	4		11		16
18	4		16		20
24	4		21		26
Special	As specified in the purchase order

1.6 Tests

Tensile & Yield test, Chemical analysis, Flattening test for ERW pipes, mill hydrostatic test. If required, DWT, Impact test etc should be applied.

#2 EN 10208-1-2009 – [British Standard]

2.1 Scope of EN 10208 line pipe standard

This European Line Pipe Standard specifies the technical delivery conditions for seamless and welded steel pipes for the on land transport of combustible fluids primarily in gas supply systems.

2.2 Pipe manufacturing process of EN 10208 line pipe standard

• Acceptable types of pipe are listed together with acceptable manufacturing routes in Table 1. Unless otherwise agreed, the process of manufacture (type of pipe) for welded pipe is left to the discretion of the manufacturer. For all types of pipe, the choice of the process route in accordance with Table 1 is left to the discretion of the manufacturer.
• SAWH pipe shall be manufactured using strip with a width not less than 0,8 or more than 3,0 times the pipe outside diameter.
• SAWL pipe may be manufactured with two seams by agreement.

2.3 Steel grade mechanical properties

Chemical composition a of the cast analysis
Steel Grade		Maximum content, % by mass
Steel Name	Steel number	C	Si	Mn	P	S
L210GA	1.0319	0,21	0,40	0,90	0,030	0,030
L235GA	1.0458	0,16	0,40	1,20	0,030	0,030
L245GA	1.0459	0,20	0,40	1,15	0,030	0,030
L290GA	1.0483	0,20	0,40	1,40	0,030	0,030
L360GA	1.0499	0,22	0,55	1,45	0,030	0,030

2.4 Steel grade chemical properties

Requirements for the result of tensile
Steel Grade		Pipe Body					Weld seam (pipe)
Steel Name	Steel number	Yield strength Rt0,5 Mpa	Tensile strength Rm MPa min.			Elongation a A % min.	EW, BW, SAW, COW	SAW, COW
							Tensile strength Rm MPa min.	Diameter of the mandrel for bend test
L210GA	1.0319	210	335	to	475	25	The same values as for the pipe body apply.	2T
L235GA	1.0458	235	370	to	510	23
L245GA	1.0459	245	415	to	555	22		3T
L290GA	1.0483	290	415	to	555	21
L360GA	1.0499	360	460	to	620	20		4T

2.5 Tolerance on dimension, mass, length of EN 10208 line pipe standard

2.5.1 Mass tolerance

The mass of any individual pipe shall not deviate from the nominal mass by more than + 10 % or – 3,5 %.

2.5.2 Thickness tolerance

Tolerances on wall thickness
Wall thickness T mm	Permissible tolerance
Seamless pipe a
T ≤ 4	+ 0,6 mm / – 0,5 mm
4 < T < 25	+ 15 % / – 12,5 %
T ≥ 25	+ 3,75 mm/ – 3,0 mm or ± 10 % (whichever is the greater)
Welded pipe
T ≤ 10	+ 1,0 mm / – 0,5 mm
10 < T < 20	+ 10 % / – 5 %
T ≥ 20	+ 2,0 mm / – 1,0 mm

2.5.3 Length Tolerance

• Depending on the order the pipes are to be delivered in random lengths or in fixed lengths.
• Random lengths shall be delivered in accordance with the requirements of the specified length groups
• Fixed lengths shall be delivered with a tolerance of ± 500 mm.

Length group	Length range for 90 % of order item	Minimum average length of order item	Shortest length of order item
r1	6 to 11	8	4
r2	9 to 14	11	6
r3	10 to 16	13	7
r4	11 to 18	15	8

2.6 Tests of EN 10208 line pipe standard

Tensile & Yield test, Chemical analysis, Flattening test for ERW pipes, bend test for SAW, COW pipe, Mill Hydrostatic Test for all kind of carbon pipe. If required, DWT, Impact test etc should be applied.

#3 IPS-M-190(2)-2004 – [Iranian Petroleum Standard]

3.1 Scope

This Line Pipe Standard gives technical specifications and general requirements for the purchase of steel line pipe for use in Oil, Gas and Petrochemical Industries under non-sour as well as sour conditions and is based on API Spec. 5L, forty-second edition, Jan 2000 and shall be read in conjunction with that document.

This line pipe standard covers seamless and welded end and plain-end steel line pipe.

3.2 Pipe manufacturing process

• Pipe manufactured by continuous welded pipe process is unacceptable.
• Only HFW pipe with a minimum welding frequency of 150KHZ, made from hot rolled coil is acceptable. A normalizing heat treatment of the weld and heat affected zone shall always be carried out, irrespective of grade and chemical composition. Full body normalizing, normalizing and tempering or quenching and tempering are also acceptable.
• The full length of the weld seam shall be made by automatic submerged arc welding, using run-on and run-off tabs. The welding procedure shall be approved by the Purchaser. Welding shall be checked at regular intervals to ensure that current, voltage and travel speed remain within the ranges of the approved welding procedure.
• Laser welded pipe is unacceptable
• Gas metal-arc welded pipe is unacceptable

3.3 Steel grade mechanical properties

CHEMICAL REQUIREMENTS FOR PRODUCT ANALYSIS BY PERCENTAGE OF WEIGHT (NON-SOUR SERVICES)
MAXIMUM PERMITTEDALLOY CONTENT, wt%
Element	GR. B	X-42	X-46	X-52	X-56	X-60	X-65	X-70
C	0.17	0.18	0.18	0.17	0.17	0.15	0.15	0.15
Mn	1.15	1.25	1.25	1.25	1.45	1.45	1.5	1.5
Si	0.4	0.4	0.4	0.4	0.4	0.35	0.35	0.35
P	0.02	0.02	0.02	0.02	0.02	0.02	0.02	0.02
S	0.015	0.015	0.015	0.015	0.015	0.015	0.015	0.015
V	0.08	0.08	0.08	0.08	0.08	0.08	0.08	0.08
Nb	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05
Ti	0.04	0.04	0.04	0.04	0.04	0.04	0.04	0.04
Cr	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2
Mo	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1
Ni	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3
Cu	0.25	0.25	0.25	0.25	0.25	0.25	0.25	0.25
Al	0.05	0.05	0.05	0.05	0.05	0.05	0.05	0.05
N	0.012	0.012	0.012	0.012	0.012	0.012	0.012	0.012
B	0.0005	0.0005	0.0005	0.0005	0.0005	0.0005	0.0005	0.0005
Ca	0.006	0.006	0.006	0.006	0.006	0.006	0.006	0.006
CE	0.39	0.39	0.39	0.39	0.39	0.39	0.39	0.39
Pcm	0.21	0.21	0.21	0.21	0.21	0.21	0.21	0.21

3.4 Tolerance on dimension, mass, length

3.4.1 Diameter tolerance

Pipe Body – The outside diameter of the pipe body, as measured by taping the circumference,
shall not deviate more than the tolerances given below:

SIZE DESIGNATION	MINUS TOLERANCE	PLUS TOLERANCE
< DN 60 (NPS 2 3/8)	0.8 mm.	0.4
≥ DN 60 (NPS 2 3/8) and ≤ DN 400 (NPS 16)	0.75% OD	0.75% OD
>DN 400 (NPS 16)	3 mm.	3mm

Pipe End – For a length of 100 mm from each pipe end, the average internal diameter shall not
deviate from the nominal internal diameter by more than the tolerances given
below: 

SIZE DESIGNATION	TYPE OF PIPE		MINUS TOLERANCE		PLUS TOLERANCE
			mm.		mm.
≤ DN 250 (NPS 10)	Welded		0.5		1.5
	SMLS		1		2
>DN 250 (NPS 10) and ≤ DN 500 (NPS 20)	Welded		1		1.5
	SMLS		1.5		2
> DN 500 (NPS 20)	Welded		1.5		1.5
	SMLS		2		2

3.4.2 Thickness

WALL THICKNESS, t	MINUS	PLUS
(mm)	TOLERANCE	TOLERANCE
t ≤ 7	0.35 mm	10%
7 < t ≤ 10	5%	10%
t > 10	0.5 mm	10%

3.4.3 Pipe Length

Unless otherwise indicated in the purchase order, pipe shall be supplied in the
following lengths:

• The average length of pipes in one order shall be not less than 11.6 m with a
  minimum of 95% of pipes between 11 and 12.2 m in length.
• No pipe shall be less than 10 m in length.

3.5 Test

Tensile & Yield test, Chemical analysis, Flattening test for ERW pipes, bend test for SAW, COW pipe, Mill Hydrostatic Test for all kind of carbon pipe. If required, DWT, Impact test, HIC, SSC test etc should be applied.

#4 GB/T 9711.1-1997 – [Chinese National Standard]

4.1 Scope

This Chinese Line Pipe Standard specifies the technical delivery conditions for alloy and non alloy seamless and welded steel pipes for the transport of combustible fluids in applications of the petroleum and natural gas industries and non combustible fluids (including water) transportation.

4.2 Pipe manufacturing process per GBT 9711.1 line pipe standard

Under this specification, pipes could be made by the following manufacturing method:

• Seamless pipe
• Continuous welding pipe
• Electric welding pipe
• Longitudinal seam submerged arc welding
• Gas metal arc welding pipe
• Combination gas metal-arc and submerged arc welded pipe
• Double seam submerged-arc welded pipe
• Double seam gas metal arc welded pipe
• Double seam combination gas metal arc and submerged arc welded pipe
• Helical seam submerged arc welded pipe

4.3 Steel grade mechanical properties and chemical composition

Steel Grade	Cast Analysis chemical composition，%				Tensile Properties
	C	Mn	P	S	Rt0.5	Rm	A5 %
					MPa	MPa	Min
	Max	Max	Max	Max	Min	Min
L175	0.21	0.30～0.60	0.03	0.03	175	315	27
L210	0.21	0.9	0.03	0.03	210	335	25
L245	0.26	1.15	0.03	0.03	245	415	21
L290	0.28	1.25	0.03	0.03	290	415	21
L320	0.3	1.25	0.03	0.03	320	435	20
L360	0.28	1.25	0.03	0.03	360	460	19
L390	0.26	1.35	0.03	0.03	390	490	18
L415					415	520	17
L450	0.26	1.4	0.03	0.03	450	535	17
L485	0.23	1.6	0.03	0.03	485	570	16
L555	0.18	1.8	0.03	0.03	555	625	15

4.4 Tolerance on dimension, mass, length

4.4.1 Diameter tolerance on pipe body, shall conform to the following requirements:

Diameter	Tolerance
≤48.3mm	+0.41mm / -0.79mm
60.3mm~114.3mm, L175 grade (continuous welded pipes)	+/-1% t
60.3mm~457mm	+/-0.75%
508~914mm
if non expansion	+/-1%
if cold expansion	-3
>914mm
if non expansion	+/-1%
if cold expansion	+6.35mm/-3.2mm

4.4.2 Diameter tolerance on pipe ends, shall conform to the following requirements:

• For steel pipe and tubes not exceed 273.1mm diameter, the minus tolerance is 0.4mm in the distance of 101.6mm from the pipe ends. Also in the same distance, pipe inner diameter shall allow a ring gauge of inner diameter with 1.59mm larger than pipe outside diameter pass through.
• For carbon welded and seamless steel pipe not less than 323.9mm but less than 508mm diameter pipe, the minus tolerance is 0.4mm in the distance of 101.6mm from the pipe ends. Also in the same distance, pipe inner diameter shall allow a ring gauge of inner diameter with 2.38mm larger than pipe outside diameter pass through.
• For mild carbon steel pipe with outside diameter exceed 508mm, the minus tolerance is 0.79mm and plus tolerance is 2.38mm, in the distance of 101.6mm from the pipe ends, measuring by tape.
• For steel pipe in OD exceed 508 and applied cold expansion, the difference of two outside diameter at pipe ends shall not exceed 2.38mm. At the option of manufacturer, the above measurement can be applied in inner diameter.

4.4.3 Thickness Tolerance 

Outside Diametere	Pipe Type	Pipe Thickness Tolerance, %
		Steel Grade
		L175, L210, L245	L290-l555
≤70.3mm	seamless and welded pipe	+20/-12.5%	+15/-12.5%
88.9-457mm	seamless and welded pipe	+15/-12.5%	+15%/-12.5%
≥508mm	welded pipe	+17.5%/-10%	+19.5%/-8%
≥508mm	seamless pipe	15%/-12.5%	+17.5%/-10%

4.5 Test

Tensile & Yield test, Chemical analysis, Flattening test for ERW pipes, bend test for SAW, COW pipe, Mill Hydrostatic Test for all kind of carbon pipe. If required, DWT, Impact test, HIC, SSC etc should be applied.

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