PIPE SPECIFICATIONS


Scope

AP15L

1/8″ – 48″
STD, XS AND XXS

Covers SEAMLESS and WELDED LINE PIPE in nominal sizes and walls through 12 inch or by OUTSIDE DIAMETERS and nominal walls in all sizes. Dimensions may be specified in English or metric units. Pipe to this specificationis suitable for use in conveying gas, water, and oil in the oil and natural gas industries.
 
Other sizes and dimensions may be furnished 
  
Hydrostatic Testing

  Lists STANDARD and higher ALTERNATIVE hydrostatic mill inspection test pressures. Each length of pipe must be tested. Welded pipe is struck while under pressure near the weld at both ends of the pipe.
 
Permissible Variations in Weights Per Foot

For STD, XS, XXS and other REGULAR weights
 
Pipe shall not vary more than 10 percent over and 3.5 percent under weights shown in tables.
 
For SPECIAL weights
 
Pipe shall not vary more than 10 percent over and 5 percent under weights shown in tables.
 
In carload (40,000 lbs) lots, weight of total pipe in car shall be not less than 1.75 percent under the calculated weight of total footage in the car.
 
Sizes 4-1/2 inch OD and smaller may be weighed in convenient lots.
 
Sizes 5-9/16 inch OD and larger shall be weighed individually.

PIPE SPECIFICATIONS


Permissible Variations in OD

AP15LOUTSIDE DIAMETER shall not vary more than:
1/8″ – 48″

Pipe Body

Over

Under
 
STD, XS and XXS

Other sizes and dimensions may be furnished
1.900″ OD and smaller
2-3/8″ through 4″ OD
4-1/2″ through 18″ OD
20″ OD and larger
0.016″
1%
3/4%
1%
0.031″
1%
3/4%
1%

Pipe Ends (4″ distance)*

Over

Under
 
10-3/4″ OD and smaller
12-2/4″ OD and larger
1/16″
3/32″
1/64″
1/32″
  
 * Required on plain end only.
OUT-OF-ROUNDNESS — 22″ OD and larger. Pipe ends (4″ distance) max. OD 1 percent larger, min. OD 1 percent smaller than tabulated.
 
Permissible Variations in Wall Thickness

Wall thickness at any point shall be within tolerances specified as follows:
 
Grade B
X42 or higher
Plus
Minus
Plus
Minus

Seamless and Welded Pipe
2-7/8″ OD and smaller
20%
12-1/2%
15%
12-1/2%
3-1/2″ OD thru 18″ OD
15%
12-1/2%
15%
12-1/2%
Welded pipe 20″ OD and larger
17-12/%
12-1/2%
19-12/%
8%
Seamless pipe 20″ OD and larger
15%
12-1/2%
17-1/2%
10%
Weld areas of welded pipe not limited by plus tolerance.

PIPE SPECIFICATIONS


Chemical Requirements

AP15LLadle Analyses, percent
1/8″ – 48″
C
Mn
P
S
 
max.
min.
max.
min.
max.
max.
 
 STD, XS and XXSGrade A,
 
 
    Seamless
0.25
0.90
0.04
0.05
    Welded
0.21
0.90
0.04
0.05
  Grade B,
     Seamless
0.27
1.15
0.04
0.05
     Welded
0.26
1.15
0.04
0.05
  Grade x 42
     Seamless
0.29
1.25
0.04
0.05
     Welded
0.29
1.25
0.04
0.05
  
Tensile Requirements

 
Tensile Strength
min, psi
Yield Point
min, psi

Grade A
48,000
30,000
Grade B
60,000
35,000
 Grade X42
60,000
42,000
Table lists minimum elongation values calculated by the equation:
e=625,000 A0.2 /U0.9   
 
Mechanical Tests Specified

  TENSILE TEST
  Required on longitudinal specimens in all sizes except welded pipe 8-5/8 inch OD and larger where transverse specimens must be used. Transverse tests must also be made for determination of the tensile strength of the weld.
  
 BEND TEST
  Required of grade A25 welded pipe in sizes 2-3/8 inch OD and smaller. Pipe shall stand cold bending through 90 degrees around a mandrel with a diameter twelve times that of OD of pipe. Weld shall be located approximately 45 degrees from point of contact of specimen and mandrel.
  
 FLATTENING TEST
 Required of all electric welded pipe. Grades A and B in sizes 2-3/8 inch OD and larger, and welded grade A25 in sizes 2-7/8 inch and larger.