SEAMLESS PIPES FOR OIL PIPELINES AND GAS PIPELINES API 5L

APPLICATION Oil and natural gas industries EXECUTION ‐ Seamless type “S” ‐ Welded “ERW” and “SAW”

GRADE B/X42/X52/L245/L290/L360 TOLERANCES

WALL THICKNESS “t” NOMINAL THICKNESS NON WELDED

PIPES (2)(mm) TOLERANCES (1)= (mm)

t ≤ 4 +0,6 / -0,5 4 < t < 25 +0,15 t / -0,125 t

t ≥ 25 +3,7 / -3,0 or +0,1 t / -0,1 t

“t” NOMINAL THICKNESS WELDED PIPES (3),

(4) (mm) TOLERANCES (1)= (mm)

t ≤ 5 +/- 0,5 5 < t < 15 +/- 0,1 t

t ≥ 15 +/- 1,5 (1) If an order is confirmed with the minimum allowable wall thickness tolerance as per the above table, the higher wall thickness 

tolerance will be sufficiently increased to maintain the tolerance range applied. (2) For pipes with an external diameter ≥ 355.6 mm and a wall thickness ≥ 25 mm,  a tolerance of 0.05 t may be added for a specific 

point if the maximum tolerance has not been reached. (3) The higher wall thickness tolerance does not apply to the weld area. (4) Any further restrictions are those defined in the standard. 

EXTERNAL DIAMETER

Tolerance of

external diameter “D”(mm)

PIPE BODY (1) (mm)

PIPE END (1),(2),(3) (mm)

SEAMLESS WELDED SEAMLESS WELDED D > 60,3 - 0,8 / + 0,4 -0,4 / +1,6

60,3 ≤ D ≤ 168,3 +/- 0,0075 D 168,3 < D ≤ 610 +/- 0,0075 D +/- 0,0075 D

MAX +/- 3,2 +/- 0,005 D MAX +/- 1,6

610 < D ≤ 1422 +/- 0,01 D +/- 0,005 D MAX +/- 4

+/- 2,0 +/- 1,6

D >1422 As per agreement

OVALIZATION

“D”

DIAMETERS (mm)

PIPE BODY (1) (mm) PIPE END (1),(2),(3) (mm)

D > 60,3 Within the diameter tolerances 60,3 ≤ D ≤ 168,3 0,020 D 0,015 D 168,3 < D ≤ 610 610 < D ≤ 1422 0,015 D with

MAX 15mm for D/t ≤ 75

As agreed for D/t >75

0,01 D with MAX 13 mm for D/t ≤

75

As agreed for D/t > 75

D >1422 As per diameter tolerances (1) The pipe “end” is considered the part of a 100 mm length from each tube extremity. (2) For seamless pipes, the tolerances applied for t ≤ 25 and those applied to greater thicknesses must be agreed upon. (3) For pipes with D ≥ 219.1 mm, the diameter and ovality tolerances can be determined using the following formula:

Di = D — 2t Di: Internal diameter D: External diameter t: Nominal wall thickness or by measuring the internal rather than the external diameter

MASS

The mass per unit length kg/m is calculated using the following formula: M=t(D - t) x C LEGEND: M = Mass per unit length (kg/m) t: Nominal wall thickness (mm) D: External diameter (mm) C: 0,0246615 The mass tolerance for each pipe must not differ from the nominal mass of +10% / - 3.5%; any further restrictions are those defined in the standard.

STRAIGHTNESS

The permissible deviation on the total length of each pipe must be ≤ 0.2 % L (single pipe length). The maximum permissable deviation in relation to a 1-metre pipe section must be ≤ 4 mm. MARKING Identification plate attached to the pipe bundle for D ≤ 48.3 mm, and with markings painted on one end for D> 48.3 mm, containing the following information: - Name or trademark of the manufacturer - Diameter and wall thickness - Grade - PSL1 or PSL2 - Reproduction process - Length - Heat number - Any additional requirements  CERTIFICATION UNI EN 10204 SIZE RANGE ASME B 36.10