PIPE SPECIFICATIONS


Scope

A106

1/8″ – 26″

Covers SEAMLESS nominal size and wall pipe for high-temperature service, suitable for bending, flanging, and similar forming operations.
STD, XS AND
XXS
ANSI B36.10
Heat treated cold drawn pipe may be furnished to this specification. Optional supplementary requirements may be specified when pipe 8 inch and larger is intended for use where a superior grade is required.
 
Other sizes and dimensions may be furnished  
 
Hydrostatic Testing

  Hydrostatic test pressures are calculated using the Barlow formula. Each pipe shall be tested to 60 percent of specified minimum yield strength, but not exceeding 2500 psi for 3 inch nominal size or smaller, or 2800 psi for sizes over 3 inch.
 
Permissible Variations in Weights Per Foot

Pipe shall not vary more than 6.5 percent over and 3.5 percent under weights shown in ANSI B36.10.
 
Sizes 4 inch and smaller are weighed in convenient lots. Pipe in sizes larger than 4 inch is weighed separately.

PIPE SPECIFICATIONS


Permissible Variations in OD

A106 OUTSIDE DIAMETER shall not exceed variations as listed below:
1/8″ – 26″

Nominal Pipe Size

Over, Inch

Under, Inch
 

STD, XS and XXS
ANSI B36.10

Other sizes and
dimensions may be furnished
1/8 to 1-1/2, incl
Over 1-1/2 to 4, incl
Over 4 to 8, incl
Over 8 to 18, incl
Over 18 to 26, incl
1/64 (0.015)
1/32 (0.031)
1/16 (0.062)
3/32 (0.093)
1/8  (0.125)
1/64 (0.015)
1/32 (0.031)
1/32 (0.031)
1/32 (0.031)
1/32 (0.031)
 
 
Permissible Variations in Wall Thickness

Minimum wall thickness at any point shall not be more than 12.5 percent under nominal wall thickness specified.
Specification contains a table of minimum wall thicknesses on inspection calculated as 0.875 x nominal wall.
 
Chemical Requirements

  Composition, max. percent
   
C
max.
Mn
P
max.
S
max.
Si
min.
 
  Grade A
0.25
0.27/0.93
0.035
0.035
0.10
  Grade B
0.30
0.29/1.06
0.035
0.035
0.10
  Grade C
0.35
0.29/1.06
0.035
0.035
0.10
 
Tensile Requirements

   
Tensile Strength
min, psi
Yield Point
min, psi

Grade A
48,000
30,000
Grade B
60,000
35,000
Grade C
70,000
40,000
Table lists minimum elongation values.

PIPE SPECIFICATIONS


Mechanical Tests Specified

A106

1/8″ – 26″

TENSILE TEST
Required on all sizes.
 
STD, XS AND
XXS
ANSI B36.10
BEND TEST
Required on sizes 2 inch and smaller. Pipe shall stand cold bending through 90 degrees around a mandrel with a diameter twelve times the nominal diameter of the pipe without cracking. If for close coiling bend shall be 180 degrees around diameter eight times the nominal diameter of pipe.
 
Other sizes and dimensions may be furnished
 
  FLATTENING TEST
Required on sizes over 2 inch in nominal diameter.