API 5L Grade X52 Seamless Steel Pipes
Product Specification : API 5L, PSL-1, PSL-2
Size: 1/2" to 24", * size above 24” NPS can be arranged on request
Schedule: SCH10, SCH 40, SCH 80, SCH 160 To SCH XXS
as per thickness mention in API 5L.
Type : Seamless, Welded, ERW, L-SAW construction
Grade : Grade X52 And L360
API 5L Grade X52 pipes have superior mechanical strength with a minimum yield strength of about 360 MPA. These grade pipes are superior to API 5L Grade B, API 5L Grade X42 and API 5L Grade X46 pipe concerning chemical and mechanical properties. Api 5l X52 Line Pipe are the most widely used pipes in the industry as they have high resistance to corrosion making them suited for sour services.
API 5L Grade X52 pipes production special attention is given to toughness and Impact test especially for sour services and high pressure and temperature services. Sulphur stress corrosion is a common occurrence in sour wells. Usually the surface of the API 5l X52 schedule 40 Pipe is coated with anti-corrosion oil, varnish, black oil paint, etc. The layer formed thus creates an additional layer of corrosion resistance on the pipes.
This grade is also non-flammable which allows it to be used in sensitive projects like power generation via nuclear, thermal, geo thermal and hydro methods. Other applications for these pipes include flood control, textile industry, sugar industry, construction of buildings. It is used to convey gas, steam and fluids. There are two differentiation levels for these pipes PSL-1 and PSL-2. PSL-1 pipes don’t require impact and non-destructive testing.
API 5L pipes are also referred to as ISO 3183 pipes.
Click here to request a quote for API 5L Grade X52 Seamless Pipe.
N-Pipe Solutions Inc. is a major supplier of API 5L Grade X52 pipes from India. We provide high-quality pipes to clients throughout the world. Pipes are stock in NPS/NB dimension as per API 5L in various thicknesses as per clients requirements. All pipes supplied by us are duly inspected by our in-house quality control department before being supplied to the client. All pipes are available with complete traceability and mill test certificate as per EN 10204 3.1.
We provide the best competitive prices to our clients backed by quality service.
Specified 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 and for offshore service application refer to Annex J of API5L 45th.
|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 steel grade|
The purchase order shall include the quantity, PSL level, type or Grade, reference to API5L, outside diameter, wall thickness, length and any applicable annexes or additional requirements related to chemical composition, mechanical properties, heat treatment, additional testing, manufacturing process, surface coatings or end finish.
|Type of Pipe||PSL 1||PSL 2|
|Grade A||Grade B||X42 to X70||B to X80||X80 to X100|
|SMLS – Seamless, without weld
LFW – Low frequency welded pipe, <70 kHz
HFW – High frequency welded pipe, >70 kHz
SAWL – Submerge-arc welding longitudinal welded
SAWH - Submerge-arc welding helical welded
Ingots, blooms, billets, coils or plates used for the manufacture of pipe shall be made by the following processes, 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.
|Steel Grade||Mass fraction, % based on heat and product analyses a,g|
|max b||max b||max||max||max||max||max|
|a. Cu ≤ = 0.50% Ni; ≤ 0.50%; Cr ≤ 0.50%; and Mo ≤ 0.15%,
b. For each reduction of 0.01% below the specified maximum concentration for carbon, an increase of 0.05% above the specified maximum concentration for Mn is permissible, up to a maximum of 1.65% for grades ≥ L245 or B, but ≤ L360 or X52; up to a maximum of 1.75% for grades > L360 or X52, but < L485 or X70; and up to a maximum of 2.00% for grade L485 or 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%
|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|
|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 maximum for C, an increase of 0.05% above the specified maximum for Mn is permissible, up to a maximum of 1.65% for grades ≥ L245 or B, but ≤ L360 or X52; up to a maximum of 1.75% for grades > L360 or X52, but < L485 or X70; up to a maximum of 2.00% for grades ≥ L485 or X70, but ≤ L555 or X80; and up to a maximum of 2.20% for grades > L555 or X80.,
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%.
|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. 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 d|
|Rt0,5 PSI Min||Rm PSI Min||R10,5IRm||(in 2in)||Rm (psi)|
|a. For intermediate grade, refer to the full API5L 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|
|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.|
|Specified Outside Diameter D (in)||Diameter Tolerance, inches d||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|
|+/- 0.0075D||– 0.016 to + 0.063||D/t≤75||D/t≤75|
|By agreement for||By agreement for|
|>6.625 to 24.000||+/- 0.0075D||+/- 0.0075D, but max of 0.125||+/- 0.005D, but max of 0.063||0.020D||0.015D|
|>24 to 56||+/- 0.01D||+/- 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|
|By agreement||By agreement|
|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 agreed|
|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|
|SMLS pipe b|
|> 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,d|
|≤ 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|
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.
No cracks shall occur in any portion of the test piece and not opening of the weld shall occur.
Many PSL2 pipe sizes and grades require CVN. Seamless pipe is to be tested in the body. Welded pipe is to be tested in the Body, Pipe Weld and heat affected zone (HAZ). Refer to the full API5L specification for the chart of sizes and grades and required absorbed energy values.