API 5L X52 pipe is a high-strength, carbon steel pipe used mainly for transporting oil, gas, and other fluids under high-pressure conditions. Also known as L360 pipe, it features a minimum yield strength of 52 Ksi (360 MPa), making it a reliable choice for harsh environments. The API 5L x52 pipe is made in compliance with ISO 3183, and API 5L specifications, guaranteeing its toughness, resilience to stress corrosion and longevity.
These pipes are commonly used in sour service applications where sulphur-induced corrosion is a major concern. To enhance their performance, the surface of api 5l x52 psl2 pipes is coated with anti-corrosion materials like oil, black paint, or varnish. This not only increases the lifespan of the pipe but also maintains efficiency in high-pressure and high-temperature environments.
These pipes come in a range of API 5L X52 pipe schedules and dimensions. The pipes can be used in the construction, sugar, textile, flood control, and power generation industries. Their versatility is unmatched, ranging from structural applications to fluid transport.
Multi Metals India is a trusted supplier of API 5L X52 pipe, offering products that meet international quality benchmarks. For any project needing strength, performance, and reliability.
Get the Best Deal on API 5L X52 pipe
| ● Oil & Gas Transportation |
| ● Petrochemical Industry |
| ● Water Supply |
| ● Construction |
| Specification | Details | |
|---|---|---|
|
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 | |
| 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 |
Multi Metals India produces API 5L X56 pipe through seamless and ERW routes. Seamless pipe starts with a solid billet heated to approximately 1,200°C, pierced on a rotary piercer, then rolled on a pilger mill to reduce wall thickness. A stretch reducer brings the outer diameter within the ±12.5% tolerance prescribed by API 5L.
ERW pipe begins with hot-rolled coil slit to the calculated skelp width. Progressive forming rolls bend the strip into a cylinder, and a high-frequency induction welder fuses the seam at above 1,300°C. A post-weld seam normalizer heats the zone above the Ac3 transformation point, eliminating the hardness peak that causes brittle fracture risk.
Where required by specification, PSL 2 X56 pipe goes through full-body normalization at 880 to 940°C, bringing Charpy V-notch impact energy to the 27-joule minimum at 0°C. Hydrostatic testing, full-body ultrasonic scanning, and magnetic particle inspection of pipe ends complete the quality sequence before dispatch.
| 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 | |
| X52 | 0.28 | 1.4 | 0.3 | 0.3 | d | d | d |
| X52 | 0.26 | 1.4 | 0.3 | 0.3 | d | d | d |
| 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% |
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| 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 | ||||||||||||
| X52N | 0.24 | 0.45 | 1.4 | 0.025 | 0.015 | 0.1 | 0.05 | 0.04 | d,e,l | 0.43 | 0.25 | ||||||||||
| X52Q | 0.18 | 0.45 | 1.5 | 0.025 | 0.015 | 0.05 | 0.05 | 0.04 | e,l | 0.43 | 0.25 | ||||||||||
| X52M | 0.22 | 0.45 | 1.4 | 0.025 | 0.015 | d | d | d | e,l | 0.43 | 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 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%. |
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| 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 | |
| X52 | 52,200 | 66,700 | c | 66,700 |
| 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 d | |||
| Rt0,5 PSI Min | Rm PSI Min | R10,5IRm | (in 2in) | Rm (psi) | |||
| Af % | |||||||
| Minimum | Maximum | Minimum | Maximum | Maximum | Minimum | Minimum | |
| X52N,X52Q,X52M | 52,200 | 76,900 | 66,700 | 110,200 | 0.93 | f | 66,700 |
| 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 | |||||||
| 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. | |||||||
| 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 | |||||
| D/t≤75 | D/t≤75 | |||||
| >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 |
| For | For | |||||
| D/t≤75 | D/t≤75 | |||||
| By agreement | By agreement | |||||
| for | for | |||||
| D/t≤75 | D/t≤75 | |||||
| >56 | As agreed | |||||
| 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 |
|---|---|
| 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,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 | |
Twenty years of manufacturing in carbon steel, alloy steel, and specialty tubular products give Multi Metals India a technical foundation that trading-only suppliers cannot replicate. ISO 9001:2015 certification governs the full production process, and material test reports with third-party inspection documents accompany every shipment.
Inventory depth reduces project risk. We stock X56 pipe across outer diameters from 1/2 inch to 24 inch NPS, wall schedules from SCH 20 through SCH XXS, in both PSL 1 and PSL 2 grades. End finishes, plain end, beveled end, and threaded-and-coupled, ship without added lead time.
Buyers can source matching flanges, fittings, and plate from the same facility, cutting vendor qualification effort on large pipeline packages. Export documentation covers country-of-origin declarations and end-use certificates for clients across the Middle East, Southeast Asia, and Europe. Contact us with your diameter, wall schedule, and delivery date to receive a quote.
