API 5L NACE MR 0175 Pipes, API 5L NACE MR 0175 Line Pipes, API 5L NACE MR 0175 Seamless Line Pipes, API 5L NACE MR 0175 Seamless Pipes, API 5L NACE MR 0175 Carbon Steel Seamless Pipes

API 5L Grade B PSL1 Pipes Certified and Tested in accordance with ISO 3183, ISO 15156, NACE MRO175 / 103, HIC, SWC, SSC, SSCC, SOUR Service, H2S, IMPACT, Post Weld Heat Treatment (PWHT), IBR, High yield, IPS-M-PI-190, IPS-M-PI-221 etc.

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Savoy Piping Inc. we carry a full inventory of API 5L NACE MR 0175 Pipe Carbon Steel Pipe and Steel Products in a variety of sizes to meet the structural piping requirements for applications the water, petroleum, oil & gas and other industries. API 5L NACE MR 0175 Pipe Carbon Steel Pipe can be Structural in Nature or used in Fluid, Gas, Oil Transmission.

We Supply API 5L NACE MR 0175 Line Pipe in API 5L Grade B PSL1, API 5L Grade B PSL2, API 5L X42 PSL1, API 5L X42 PSL2, API 5L X46 PSL1, API 5L X46 PSL2, API 5L X52 PSL1, API 5L X52 PSL2, API 5L X56 PSL1, API 5L X56 PSL2, API 5L X60 PSL1, API 5L X60 PSL2, API 5L X65 PSL1, API 5L X65 PSL2 API 5L X70 PSL1, API 5L X70 PSL2 The grade indicates the testing methods required for a given application. It is critical that structural grades of Carbon Steel Pipe not be used for Pressure or Fluid applications.

Savoy Piping Inc. specializes in API 5L Seamless Line Pipe with years of Experience in Manufacturing API 5L Carbon Steel Pipe we offer high quality, lower cost but the best service. As a result to that our API 5L Pipes export account today is in various countries like Iran, Iraq, Kuwait, Saudi Arabia, Oman, UAE, Singapore, Malaysia, Indonesia, South korea, Chile, Peru, Venezuela, Australia, Nigeria, Angola, Senegal, Mozambique, Algeria, Libya, Azerbaijan, Netherlands, Brazil, Norway, United Kingdom, Mexico, Canada etc.

Introduction of API 5L NACE MR 0175 Pipes

Applications for API 5L include, but are not limited to: petroleum, petrochemical, natural gas industries, and waterworks. API 5L NACE MR 0175 Line Pipe is dimensionally equivalent to A106 and A53 pipe, conforming to industry standard sizes, however it performs to different mechanical properties.

NACE MR 0175/ISO 15156 is a Materials Standard issued by the National Association of Corrosion Engineers. It is originally a US standard intended to assess the suitability of materials for oilfield equipment where sulphide (sulphide) stress corrosion cracking may be a risk in hydrogen sulphide (sour) environments. API 5L NACE MR 0175 Pipe Covers Seamless and Welded Steel Line Pipe. It includes standard-weight and Extra-Strong threaded Line Pipe. It includes standard-weight and extra-strong threaded line pipe; and standard-weight plain-end, regular-weight plain-end, special plain-end, extra-strong plain-end, special plain-end, extra-strong plain-end pipe; as as well as bell and spigot and through-the-flow line(TFL) pipe. The purpose of this specification is to provide standards for pipe suitable for use in conveying gas, water, and oil in both the oil and natural gas industries Grades covered by this specification are A25 ,A ,B (and the following "X" Grades) X42, X46, X52, X56, X60, X65, X70, X80 . The two digit number following the "X" indicates the Minimum Yield Strength (in 000's psi) of pipe produced to this grade Savoy Piping Inc. Supply a full range of API 5L Seamless Pipes in PSL-1 & PSL-2 line pipe.

API 5L NACE MR 0175 Line Pipe is dimensionally equivalent to A106 and A53 pipe, conforming to industry standard sizes, however it performs to different mechanical properties. One key defining characteristic of this pipe is its yield strength, where the two digit number following the pipe’s "X" grade indicates the Minimum Yield Strength (in 000's psi) of pipe produced to this grade (i.e. X52 Pipe).

NACE MR0175 Compliance:

NACE MR0175 compliance is essential for materials used in environments where hydrogen sulfide (H2S) is present, as these conditions can lead to sulfide stress cracking (SSC) and hydrogen-induced cracking (HIC). The NACE MR0175 standard provides guidelines for materials selection to prevent corrosion and cracking in such harsh environments.

Materials:

API 5L NACE MR0175 pipes are typically made from carbon and low-alloy steels with specific chemical composition requirements to ensure resistance to sulfide stress cracking. These materials are carefully selected to withstand corrosive conditions found in oil and gas production environments.

Quality and Reliability:

API 5L NACE MR0175 pipes are manufactured with a focus on quality and reliability. The stringent requirements and testing procedures ensure that the pipes meet the necessary standards for use in challenging and corrosive environments, providing a high level of integrity and safety.
API 5L NACE MR0175 Pipes are designed to meet the challenges of corrosive environments in the oil and gas industry, providing a reliable and durable solution for conveying fluids in the presence of hydrogen sulfide. Compliance with NACE MR0175 standards ensures that these pipes can withstand the harsh conditions associated with sour service applications.

API 5L Seamless Line Pipe range

API 5L NACE MR 0175 Pipe Specification	API 5L / ISO 3183 Hot Rolled.
API 5L NACE MR 0175 Pipe Grades	API 5L Grade B PSL1, PSL 2 / API 5L X42 PSL1, PSL 2 / API 5L X46 PSL1, PSL 2 / API 5L X52 PSL1, PSL 2 / API 5L X56 PSL1, PSL 2 / API 5L X60 PSL1, PSL 2 / API 5L X65 PSL1, PSL 2 / X70 PSL1, PSL 2 / API 5L X70 PSL1 / PSL2 / API 5L X80 PSL1, PSL 2 / L245 PSL1, PSL 2, L290 PSL1, PSL 2, L320 PSL1, PSL 2, L360 PSL1, PSL 2, L390 PSL1, PSL 2, L415 PSL1, PSL 2, L450 PSL1, PSL 2, L485 PSL1, PSL 2
API 5L NACE MR 0175 Pipe Type	Seamless
API 5L NACE MR 0175 Pipe Outer Diameter Size	3/8" NB to 30" NB (Nominal Bore Size)
API 5L NACE MR 0175 Pipe Wall Thickness	Schedule 20 to Schedule XXS (Heavier On Request) Up to 250 mm Thickness
API 5L NACE MR 0175 Pipe Length	5 to 7 Meters, 09 to 13 Meters, Single Random Length, Double Random Length And Customize Size.
API 5L Pipe Ends	Plain Ends / Beveled Ends / Coupling
API 5L NACE MR 0175 Pipe Delivery Conditions	As Rolled, Normalizing Rolled, Thermomechanical Rolled / Formed, Normalizing Formed, Normalized and Tempered / Quenched and Tempered - BR / N / Q /T
API 5L NACE MR 0175 Pipe Coating	Epoxy Coating / Colour Paint Coating / 3LPE Coating.
API 5L NACE MR 0175 Pipe Other Testing	NACE MR0175, NACE TM0177, NACE TM0284, HIC TEST, SSC TEST, SWC, H2 SERVICE, IBR, Etc.
API 5L NACE MR 0175 Pipe Dimension	All Pipes Tube Is Manufactured and Inspected / Tested to the Relevant standards including ASTM, ASME, API.
API 5L NACE MR 0175 Pipe Value Added Services	Draw / Expansion / Machining / Sand Blasting / Shot Blasting / Galavanizing / Heat Treatment
API 5L NACE MR 0175 Pipe Packaging	Loose / Bundle / Wooden Pallet / Wooden box-a / Plastic Cloth Wraps / Plastic End Caps / Beveled Protector
API 5L NACE MR 0175 Pipe Shipment & Transportation	By Road - Truck / Train, By Sea - Break-bulk Conventional Vessel / FCL (Full Container Load) / LCL (Less Container Load) / 20 Feet Container / 40 Feet
API 5L NACE MR 0175 Pipe Material Test Certificate	Manufacturer Test Certificate As Per EN10204 3.1, 3.2 / Laboratory Test Certificate From NABL Approved Lab./ Under Third Party Inspection Agency Like SGS, TUV, DNV, LLOYDS, ABS ETC

Scope

ANSI / API 5L specifies the manufacture of two product levels (PSL1 and PSL2) of Seamless and Welded steel pipe for the use of a pipeline in the transportation of petroleum and natural gas. for material use in a sour service application, refer to Annex H; for offshore service application, refer to Annex J of API 5L 45th Edition.

Process

Ingots, blooms, billets, coils or plates used for the manufacture of pipe shall be made via basic oxygen, electric furnace or open hearth in combination with a ladle refining process. for PSL2, the steel shall be killed and melted according to a fine grain practice. Coil or plate used for PSL2 pipe shall not contain any repair welds.

API 5L NACE MR 0175 Line Pipe PSL1 Chemical Requirement

Chemical Composition for PSL 1 pipe with t ≤ 0.984”

Steel Grade	Mass fraction, % based on heat and product analyses a,g
	C	Mn	P	S	V	Nb	Ti
	max b	max b	max	max	max	max	max
Seamless Pipe
A	0.22	0.9	0.3	0.3	–	–	–
B	0.28	1.2	0.3	0.3	c,	c,
X42	0.28	1.3	0.3	0.3
X46	0.28	1.4	0.3	0.3
X52	0.28	1.4	0.3	0.3
X56	0.28	1.4	0.3	0.3
X60	0.28 e	1.40 e	0.3	0.3	f	f	f
X65	0.28 e	1.40 e	0.3	0.3	f	f	f
X70	0.28 e	1.40 e	0.3	0.3	f	f	f
Welded Pipe
A	0.22	0.9	0.3	0.3	–	–	–
B	0.26	1.2	0.3	0.3	c,	c,
X42	0.26	1.3	0.3	0.3
X46	0.26	1.4	0.3	0.3
X52	0.26	1.4	0.3	0.3
X56	0.26	1.4	0.3	0.3
X60	0.26 e	1.40 e	0.3	0.3	f	f	f
X65	0.26 e	1.45 e	0.3	0.3	f	f	f
X70	0.26e	1.65 e	0.3	0.3	f	f	f
a. Cu ≤ = 0.50% Ni; ≤ 0.50%; Cr ≤ 0.50%; and Mo ≤ 0.15%, b. for each reduction of 0.01% below the specified max. concentration for carbon, and increase of 0.05% above the specified max. concentration for Mn is permissible, up to a max. of 1.65% for grades ≥ B, but ≤ = X52; up to a max. of 1.75% for grades X52, but X70; and up to a maximum of 2.00% for X70., c. Unless otherwise agreed NB + V ≤ 0.06%, d. Nb + V + TI ≤ 0.15%, e. Unless otherwise agreed., f. Unless otherwise agreed, NB + V = Ti ≤ 0.15%, g. No deliberate addition of B is permitted and the residual B ≤ 0.001%

Chemical Composition for PSL 2 NACE MR 0175 pipe with t ≤ 0.984”

Steel Grade	Mass fraction, % based on heat and product analyses													Carbon Equiv a
	C	Si		Mn		P		S		V	Nb	Ti	Other	CE IIW	CE Pcm
	max b	max		max b		max		max		max	max	max		max	max
Seamless and Welded Pipe
BR	0.24	0.4		1.2		0.025		0.015		c	c	0.04	e,l	0.043	0.25
X42R	0.24	0.4		1.2		0.025		0.015		0.06	0.05	0.04	e,l	0.043	0.25
BN	0.24	0.4		1.2		0.025		0.015		c	c	0.04	e,l	0.043	0.25
X42N	0.24	0.4		1.2		0.025		0.015		0.06	0.05	0.04	e,l	0.043	0.25
X46N	0.24	0.4		1.4		0.025		0.015		0.07	0.05	0.04	d,e,l	0.043	0.25
X52N	0.24	0.45		1.4		0.025		0.015		0.1	0.05	0.04	d,e,l	0.043	0.25
X56N	0.24	0.45		1.4		0.025		0.015		0.10f	0.05	0.04	d,e,l	0.043	0.25
X60N	0.24f	0.45f		1.40f		0.025		0.015		0.10f	0.05f	0.04f	g,h,l	As agree
BQ	0.18	0.45		1.4		0.025		0.015		0.05	0.05	0.04	e,l	0.043	0.25
X42Q	0.18	0.45		1.4		0.025		0.015		0.05	0.05	0.04	e,l	0.043	0.25
X46Q	0.18	0.45		1.4		0.025		0.015		0.05	0.05	0.04	e,l	0.043	0.25
X52Q	0.18	0.45		1.5		0.025		0.015		0.05	0.05	0.04	e,l	0.043	0.25
X56Q	0.18	0.45f		1.5		0.025		0.015		0.07	0.05	0.04	e,l	0.043	0.25
X60Q	0.18f	0.45f		1.70f		0.025		0.015		g	g	g	h,l	0.043	0.25
X65Q	0.18f	0.45f		1.70f		0.025		0.015		g	g	g	h,l	0.043	0.25
X70Q	0.18f	0.45f		1.80f		0.025		0.015		g	g	g	h,l	0.043	0.25
X80Q	0.18f	0.45f		1.90f		0.025		0.015		g	g	g	i,j	As agree
X90Q	0.16f	0.45f		1.9		0.02		0.01		g	g	g	j,k	As agree
X100Q	0.16f	0.45f		1.9		0.02		0.01		g	g	g	j,k	As agree
Welded Pipe
BM		0.22	0.45		1.2		0.025		0.015	0.05	0.05	0.04	e,l	0.043	0.25
X42M		0.22	0.45		1.3		0.025		0.015	0.05	0.05	0.04	e,l	0.043	0.25
X46M		0.22	0.45		1.3		0.025		0.015	0.05	0.05	0.04	e,l	0.043	0.25
X52M		0.22	0.45		1.4		0.025		0.015	e,l	0.043	0.25
X56M		0.22	0.45f		1.4		0.025		0.015	e,l	0.043	0.25
X60M		0.12f	0.45f		1.60f		0.025		0.015	g	g	g	h,l	0.043	0.25
X65M		0.12f	0.45f		1.60f		0.025		0.015	g	g	g	h,l	0.043	0.25
X70M		0.12f	0.45f		1.70f		0.025		0.015	g	g	g	h,l	0.043	0.25
X80M		0.12f	0.45f		1.85f		0.025		0.015	g	g	g	i,j	.043f	0.25
X90M		0.1	0.55f		2.10f		0.02		0.01	g	g	g	i,j	–	0.25
X100M		0.1	0.55f		2.10f		0.02		0.01	g	g	g	i,j	–	0.25
a. SMLS t 0.787”, CE limits shall be as agreed. The CEIIW limits applied fi C 0.12% and the CEPcm limits apply if C ≤ 0.12%, b. for each reduction of 0.01% below the specified max. concentration for carbon, and increase of 0.05% above the specified max. concentration for Mn is permissible, up to a max. of 1.65% for grades ≥ B, but ≤ = X52; up to a max. of 1.75% for grades X52, but X70; and up to a maximum of 2.00% for X70. c. Unless otherwise agreed Nb = V ≤ 0.06%, d. Nb = V = Ti ≤ 0.15%, e. Unless otherwise agreed, Cu ≤ 0.50%; Ni ≤ 0.30% Cr ≤ 0.30% and Mo ≤ 0.15%, f. Unless otherwise agreed, g. Unless otherwise agreed, Nb + V + Ti ≤ 0.15%, h. Unless otherwise agreed, Cu ≤ 0.50% Ni ≤ 0.50% Cr ≤ 0.50% and MO ≤ 0.50%, i. Unless otherwise agreed, Cu ≤ 0.50% Ni ≤ 1.00% Cr ≤ 0.50% and MO ≤ 0.50%, j. B ≤ 0.004%, k. Unless otherwise agreed, Cu ≤ 0.50% Ni ≤ 1.00% Cr ≤ 0.55% and MO ≤ 0.80%, l. for all PSL 2 pipe grades except those grades with footnotes j noted, the following applies. Unless otherwise agreed no intentional addition of B is permitted and residual B ≤ 0.001% .

API 5L NACE MR 0175 Pipe MECHANICAL PROPERTIES

Pipe Grade	Tensile Properties – Pipe Body of SMLS and Welded Pipes PSL 1			Seam of Welded Pipe
	Yield Strength a	Tensile Strength a	Elongation	Tensile Strength b
	Rt0,5 PSI Min	Rm PSI Min	(in 2in Af % min)	Rm PSI Min
A	30,500	48,600	c	48,600
B	35,500	60,200	c	60,200
X42	42,100	60,200	c	60,200
X46	46,400	63,100	c	63,100
X52	52,200	66,700	c	66,700
X56	56,600	71,100	c	71,100
X60	60,200	75,400	c	75,400
X65	65,300	77,500	c	77,500
X70	70,300	82,700	c	82,700
a. for intermediate grade, the difference between the specified minimum tensile strength and the specified minimum yield for the pipe body shall be as given for the next higher grade.
b. for the intermediate grades, the specified minimum tensile strength for the weld seam shall be the same as determined for the body using foot note a.
c. The specified minimum elongation, Af, expressed in percent and rounded to the nearest percent, shall be determined using the following equation:

Where C is 1 940 for calculation using Si units and 625 000 for calculation using USC units
Axc is the applicable tensile test piece cross-sectional area, expressed in square millimeters (square inches) , as follows
– for circular cross-section test pieces, 130mm2 (0.20 in2) for 12.7 mm (0.500 in) and 8.9 mm (.350 in) diameter test pieces; and 65 mm2 (0.10 in2) for 6.4 mm (0.250in) diameter test pieces.
– for full-section test pieces, the lesser of a) 485 mm2 (0.75 in2) and b) the cross-sectional area of the test piece, derived using the specified outside diameter and the specified wall thickness of the pipe, rounded to the nearest 10 mm2 (0.10in2)
– for strip test pieces, the lesser of a) 485 mm2 (0.75 in2) and b) the cross-sectional area of the test piece, derived using the specified width of the test piece and the specified wall thickness of the pipe, rounded to the nearest 10 mm2 (0.10in2)
U is the specified minimum tensile strength, expressed in megapascals (pounds per square inch)

Pipe Grade	Tensile Properties – Pipe Body of SMLS and Welded Pipes PSL 2						Seam of Welded Pipe
	Yield Strength a		Tensile Strength a		Ratio a,c	Elongation	Tensile Strength
	Rt0,5 PSI Min		Rm PSI Min		R10,5IRm	(in 2in)	Rm (psi)
						Af %
	Minimum	Maximum	Minimum	Maximum	Maximum	Minimum	Minimum
BR, BN,BQ,BM	35,500	65,300	60,200	95,000	0.93	f	60,200
X42,X42R,X2Q,X42M	42,100	71,800	60,200	95,000	0.93	f	60,200
X46N,X46Q,X46M	46,400	76,100	63,100	95,000	0.93	f	63,100
X52N,X52Q,X52M	52,200	76,900	66,700	110,200	0.93	f	66,700
X56N,X56Q,X56M	56,600	79,000	71,100	110,200	0.93	f	71,100
X60N,X60Q,S60M	60,200	81,900	75,400	110,200	0.93	f	75,400
X65Q,X65M	65,300	87,000	77,600	110,200	0.93	f	76,600
X70Q,X65M	70,300	92,100	82,700	110,200	0.93	f	82,700
X80Q,X80M	80,.500	102,300	90,600	119,700	0.93	f	90,600
a. for intermediate grade, refer to the full API5L Piping Specification.
b. for grades X90 refer to the full API5L specification.
c. This limit applies for pies with D 12.750 in
d. for intermediate grades, the specified minimum tensile strength for the weld seam shall be the same value as was determined for the pipe body using foot a.
e. for pipe requiring longitudinal testing, the maximum yield strength shall be ≤ 71,800 psi
f. The specified minimum elongation, Af, expressed in percent and rounded to the nearest percent, shall be determined using the following equation:

Where C is 1 940 for calculation using Si units and 625 000 for calculation using USC units
Axc is the applicable tensile test piece cross-sectional area, expressed in square millimeters (square inches) , as follows
– for circular cross-section test pieces, 130mm2 (0.20 in2) for 12.7 mm (0.500 in) and 8.9 mm (.350 in) diameter test pieces; and 65 mm2 (0.10 in2) for 6.4 mm (0.250in) diameter test pieces.
– For full-section test pieces, the lesser of a) 485 mm2 (0.75 in2) and b) the cross-sectional area of the test piece, derived using the specified outside diameter and the specified wall thickness of the pipe, rounded to the nearest 10 mm2 (0.10in2)
– For strip test pieces, the lesser of a) 485 mm2 (0.75 in2) and b) the cross-sectional area of the test piece, derived using the specified width of the test piece and the specified wall thickness of the pipe, rounded to the nearest 10 mm2 (0.10in2)
U is the specified minimum tensile strength, expressed in megapascals (pounds per square inch
g. Lower values fo R10,5IRm may be specified by agreement
h. for grades x90 refer to the full API5L specification.

Delivery condition

PSL	Delivery Condition	Pipe grade
PSL1	As-rolled, normalized, normalizing formed	A
	As-rolled, normalizing rolled, thermomechanical rolled, thermo-mechanical formed, normalizing formed, normalized, normalized and tempered or if agreed Q&T SMLS only	B
	As-rolled, normalizing rolled, thermomechanical rolled, thermo-mechanical formed, normalizing formed, normalized, normalized and tempered	X42, X46, X52, X56, X60, X65, X70
PSL 2	As-rolled	BR, X42R
	Normalizing rolled, normalizing formed, normalized or normalized and tempered	BN, X42N, X46N, X52N, X56N, X60N
	Quenched and tempered	BQ, X42Q, X46Q, X56Q, X60Q, X65Q, X70Q, X80Q, X90Q, X100Q
	Thermomechanical rolled or thermomechanical formed	BM, X42M, X46M, X56M, X60M, X65M, X70M, X80M
	Thermomechanical rolled	X90M, X100M, X120M
	The suffice (R, N, Q or M) for PSL2 grades, belongs to the Stainless Steel grade

Hydrostatic test

Pipe to withstand a hydrostatic test without leakage through the weld seam or the pipe body. Jointers need not be hydrostatic tested provide the pipe sections used were successfully tested.

Bend test

No cracks shall occur in any portion of the test piece and no opening of the weld shall occur.

Flattening test

Acceptance criteria for flattening test shall be:

EW Pipes D< 12.750 in:
X60 with T 500in. There shall be no opening of the weld before the distance between the plates is less than 66% of the original outside diameter. for all grades and wall, 50%.
For pipe with a D/t 10, there shall be no opening of the weld before the distance between the plates is less than 30% of the original outside diameter.
For other sizes refer to the full API 5L specification.

CVN impact test for PSL2

Many PSL2 pipe sizes and grades require CVN. Steel Seamless Pipe is to be tested in the body. Welded pipe is to be tested in the body, pipe weld and heat-affected zone. Refer to the full API 5L specification for the chart of sizes and grades and required absorbed energy values.

Tolerances: Outside diameter, out of roundness and wall Thickness

Specified Outside Diameter D (in)	Diameter Tolerance, inches				Out-of-Roundness Tolerance in
	Pipe except the end a		Pipe end a,b,c		Pipe except the End a	Pipe End a,b,c
	SMLS Pipe	Welded Pipe	SMLS Pipe	Welded Pipe
2.375	-0.031 to + 0.016		– 0.031 to + 0.016		0.048	0.036
≥2.375 to 6.625					0.020D for	0.015D for
	+/- 0.007		– 0.016 to + 0.063
					By agreement for	By agreement for

6.625 to 24.000	+/- 0.0075	+/- 0.0075D, but max of 0.125	+/- 0.005D, but max of 0.063		0.020	0.015
24 to 56	+/- 0.01	+/- 0.005D but max of 0.160	+/- 0.079	+/- 0.063	0.015D for but max of 0.060	0.01D for but max of 0.500
					For	For

					By agreement	By agreement
					for	for

56	As agree
a. The pipe end includes a length of 4 in ate each of the pipe extremities
b. for SMLS pipe the tolerance apply for t≤0.984in and the tolerances for the thicker pipe shall be as agree
c. for expanded pipe with D≥8.625in and for non-expanded pipe, the diameter tolerance and the out-of-roundness tolerance may be determined using the calculated inside diameter or measured inside diameter rather than the specified OD.
d. for determining compliance to diameter tolerance, the pipe diameter is defined as the circumference of the pipe in any circumferential plane divide by Pi.

Tolerances: Outside diameter, out of roundness and wall thickness

Specified Outside Diameter D (in)	Diameter Tolerance, inches				Out-of-Roundness Tolerance in
	Pipe except the end a		Pipe end a,b,c		Pipe except the End a	Pipe End a,b,c
	SMLS Pipe	Welded Pipe	SMLS Pipe	Welded Pipe
2.375	-0.031 to + 0.016		– 0.031 to + 0.016		0.048	0.036
≥2.375 to 6.625					0.020D for	0.015D for
	+/- 0.0075		– 0.016 to + 0.063
					By agreement for	By agreement for

6.625 to 24.000	+/- 0.0075	+/- 0.0075D, but max of 0.125	+/- 0.005D, but max of 0.063		0.020	0.015
24 to 56	+/- 0.01	+/- 0.005D but max of 0.160	+/- 0.079	+/- 0.063	0.015D for but max of 0.060	0.01D for but max of 0.500
					For	For

					By agreement	By agreement
					for	for

56	As agree
a. The pipe end includes a length of 4 in ate each of the pipe extremities
b. for SMLS pipe the tolerance apply for t≤0.984in and the tolerances for the thicker pipe shall be as agree
c. for expanded pipe with D≥8.625in and for non-expanded pipe, the diameter tolerance and the out-of-roundness tolerance may be determined using the calculated inside diameter or measured inside diameter rather than the specified OD.
d. for determining compliance to diameter tolerance, the pipe diameter is defined as the circumference of the pipe in any circumferential plane divide by Pi.

Wall thickness	Tolerances a
t inches	inches
SMLS pipe b
≤ 0.157	-1.2
0.157 to 0.948	+ 0.150t / – 0.125t
≥ 0.984	+ 0.146 or + 0.1t, whichever is the greater
	– 0.120 or – 0.1t, whichever is the greater
Welded pipe c,
≤ 0.197	+/- 0.020
0.197 to 0.591	+/- 0.1t
≥ 0.591	+/- 0.060
a. If the purchase order specifies a minus tolerance for wall thickness smaller than the applicable value given in this table, the plus tolerance for wall thickness shall be increased by an amount sufficient to maintain the applicable tolerance range.
b. for pipe with D≥ 14.000 in and t≥0.984in, the wall thickness tolerance locally may exceed the plus tolerance for wall thickness by an additional 0.05t provided that the plus tolerance for mass is not exceeded.
c. The plus tolerance for wall thickens does not apply to the weld area
d. See the full API5L spec for full details

API 5L NACE MR 0175 Line Pipe Comparative Specifications

The information here is summarized from ASTM Standards and API or API 5CTSpecification 5L. Please see the specific standards for more information.

Grade Range	A25 Through X70	Gr B Through X80	Table 1
Size Range	0.405 Through 80	4-2/1 Through 80	Table 1
Type Of Pipe Ends	Plain-End, Threaded-end, Bevelled-End, Special Coupling Pipe	Plain-En	Table 1
Seam Welding	All Methods Continous Welding Limited to Grade A25	All Methods Except Continous And Laser Welding	Table 1
Electric Welds: Welder Frequency	No Minimum	100 Khz Minimum	5.1.3.3.2
Heat Treatments of Electric Welds	Required For Grades > X42	Required For All Grades (Gr B Through X80)	5.1.3.3.1; J.3.3.2:6.2.7
Chemistry: Max C For Seamless Pipe	0.28% For Grades > Gr B	0.24%	tables 2a, 2b
Chemistry: Max C For Welded Pipe	0.26% For Grades > Gr B	0.22%	tables 2a, 2b
Chemistry: Max P	0.03%	0.03%	Tables 2a, 2b
Chemistry: Max S	Only When Purchases Specifies Sr18	0.02%	Tables 2a, 2b
Carbon Equivalent	None	Maximum Required for Each Grade	4.2:4.3:6.1.3: Sr15.1
Yield Strength, Maximum	None	Maximum for Each Grade	tables 3a, 3b
UTS, Maximum	None Require	Maximum For Each Grade	Tables 3a, 3b
Fracture Toughness	Only When Purchaser Specifies Sr4	Required For All Grades	6.2.6; 9.3.5: 9.8.4; 9.10.7;
Non-destructive Inspection of Seamless Pipes	Permitte	sr4 Mandatory	table 14 9.7.2.6
Repair By Welding of Pipe Body, Plate And Skelp	Permitted By Agreement	Prohibite	5.3.2;9.7.6: B.1;b.2
Certification	Certificates When Specified Per Sr15	Prohibite	4.3;9.7.4.4;9.7.6;b.1.2;b.4
Traceability	Traceable Only Until All Tests are Passed Unless Sr15 Is Specifie	Certificates (Sr15.1) Mandatory Traceable After Completion of Tests (Sr15.2) Mandatory	12.1 5.6

Permissible Variations for Seamless and Welded API 5L NACE MR 0175 Steel Pipe

	Grade A, B, A25	X42 through X80
NPS 2-1/2 and smaller --Seamless and Welded, %	+20 -- 12.5	+15 -- 12.5
NPS 3 --Seamless and Welded, %	+18 -- 12.5	+15 -- 12.5
NPS 4 through 18 --Seamless and Welded, %	+15 -- 12.5	+15 -- 12.5
NPS 20 and larger -- Welded, %	+17.5 -- 10.0	+19.5 -- 8.0
NPS 20 and larger -- Seamless, %	+15.0 -- 12.5	+17.5 -- 10.0

Typical process of manufacturing API 5L NACE MR 0175 Pipes

Type of Pipe	PSL 1			PSL 2
Type of Pipe	Grade A	Grade B	X42 to X70	B to X80	X80 to X100
SMLS
LFW
HFW
LW
SAWL
SAWH
SMLS – Seamless, without wel LFW – Low frequency welded pipe, 70 kHz HFW – High frequency welded pipe, 70 kHz SAWL – Submerge-arc welding longitudinal welde SAWH - Submerge-arc welding helical welde

Marking Requirements

Paint-stenciled or die-stamped manufacturer’s name or mark, Spec 5L, size, weight per foot, grade, process of manufacture, type of steel, length (NPS 4 and larger only). Test pressure when higher than tabulated (NPS 2 and larger only).

Supplemental Annexes for API 5L NACE MR 0175Seamless and Welded steel Pipe

API Specification 5L contains 15 Supplemental Annexes that address special conditions and/or additional requirements.

Source: Prosaic Steel & Alloys

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API 5L NACE MR 0175 Pipes

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