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. | |