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Chemical Requirements

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Seamless Line Pipe:

Chemical Requirements, Percent (Product)
Specification Grade C Max Mn Max P Max S Max Other
API 5L PSL 1a A
B
X42
X45,X52,X56
X60e,X65e,X70e
0.22
0.28
0.28
0.28
0.28
0.90
1.20
1.30
1.40
1.40
0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.030
--
 b,d 
 c,d 
 c,d 
 c,d 
API 5L PSL 2a B
X42
X46,X52,X56
X60e,X56e
X70e,X80e
0.24
0.24
0.24
0.24
0.24
1.20
1.30
1.40
1.40
1.40
0.025
0.025
0.025
0.025
0.025
0.015
0.015
0.015
0.015
0.015
 b,c 
 c,d 
 c,d 
 c,d 
 c,d 

Electric Resistance Weld Line Pipe:

Chemical Requirements, Percent (Product)
Specification Grade C Max Mn Max P Max S Max Other
API 5L PSL 1a A
B
X42
X46,X52,X56
X60e
X65e
X70e
0.22
0.26
0.26
0.26
0.26
0.26
0.26
0.90
1.20
1.30
1.40
1.40
1.45
1.65
0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.030
--
 b,d 
 c,d 
 c,d 
 c,d 
 c,d 
 c,d 
API 5L PSL 2a B
X42
X46,X52,X56
X60e
X65e
X70e
X80e
0.22
0.22
0.22
0.22
0.22
0.22
0.22
1.20
0.30
1.40
1.40
1.45
1.65
1.85
0.025
0.025
0.025
0.025
0.025
0.025
0.025
0.015
0.015
0.015
0.015
0.015
0.015
0.015
 b,d 
 c,d 
 c,d 
 c,d 
 c,d 
 c,d 
 c,d 

aFor each reduction of 0.01% below the specified maximum carbon content, an increase of 0.05% above the specified maximum manganese content is permissible, up to a maximum of 1.50% for Grades X42 through X52, up to a maximum of 1.65% for Grades higher than X52 but less than X70, and up to 2.00% for Grades X70 and higher.
bColumbium [niobium], vanadium, titanium, or combinations therof may be used by agreement between purchaser and manufacturer.
cColumbium [niobium], vanadium, titanium, or combinations therof may be used at the discretion of the manufacturer.
dThe sum of the columbium [nobium], vanadium, and titanium contents shall not exceed 0.15%.
eOther chemical compositions may be furnished by agreement between purchaser and manufacturer, providing that the limits of Footnote d and the tabular limits for phosphorus and sulfer are met.

Testing Requirements

  • Hydrostatic Testing

    Lists hydrostatic inspection test pressures for all sizes and grades covered by the specification. Test Pressures are held for not less than:
    • Seamless  (all sizes) - 5 seconds
    • Welded (NPS 18 and smaller) - 5 seconds
      (NPS 20 and larger) - 10 seconds
  • Mechanical Tests

    Tensile Test  
      Seamless and ERW 
    NPS 6 and smaller - Longitudinal
    NPS 8 and larger - Transverse
    Charpy Tests PSL 2
    Flattening Test ERW - All sizes
  • Number of Tests

    Flattening: Non-Expanded ERW for single lengths, crop ends from each lenth. For multiple lengthes, crop ends from first and last pipe of each coil, plus 2 intermediate rings.
    Tensile:
    NPS On One Length From Each Lot of:
    5 and smaller
    400 or less
    6 through 12
    200 or less
    14 and larger
    100 or less

Permissible Variations

  • Wall Thickness

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

    For Single Lengths Spcial Plain End and Grade A25: Not more than plus 10% minus 5%.
    For Single Lengths Other Pipe: Not more than plus 10% minus 3.5%
    For Carload Lots: Not more than minus 1.75%
    Note: NPS 4 OD and smaller may be weighed individually or in convenient lots. Larger sizes by length.
  • Outside Diameter

    Outside Diameter at any point shall not
    vary from standard specified more than:
    NPS Over Under
    1 1/2 and smaller
    +1/64 -1/32
    2 through 18
    +.75% -.75%
    20 and larger Seamless
    +1% -1%
    20-36 Welded
    +.75% -.25%
    Outside Diameter End Tolerances
    (plain end pipe, distance from each end):
    NPS Over Under
    10 and smaller
    +1/16 -1/64
    12 and larger
    +3/32 -1/32
    Out-of-Roundness Tolerances
    (distance of 4" from each end):
    NPS Over Under
    22 and larger +1%* -1%*

    *Based upon nominal OD specified.

Lengths

Plain End Pipe Shortest Length
in Entire Shipment
Minimum Avg.
Length in Entire
Shipment
Maximum Length
20' Nominal
9'0" 17'6" 22'6"
40' Nominal
14'0" 35'0" 45'0"
60' Nominal
21'0" 52'6" 65'0"
80' Nominal
28'0" 70'0" 85'0"

Marking Requirements on Each Length

  • Painted 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 hogher than tabulated (NPS 2 and larger only). Heat treat symbols, as applicable - HN, HS, HA or HQ.

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