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Standard Specification for High-Silicon Iron Pipe and Fittings
1.1 This specification covers high-silicon iron pipe and pipe fittings intended for corrosion-resistant service for both above- and below-grade construction.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.3 Pipe and pipe fittings shall be the no-hub (MJ) or the hub and plain end design.
1.4 Pipe and pipe fittings shall be of the sizes specified in Table 1 and Table 2 and Figs. 1-71 or other sizes that shall be permitted to conform to the requirements given herein.
TABLE 1 Tolerances for High-Silicon Iron Hub/Plain-End Pipe
Note 1: 1 in. = 25.4 mm.
Size, in. | Wall Thickness, in. | ID Tolerance, in. | OD Tolerance, in. |
2 | ±1/32 | ±1/32 | ±1/32 |
3 | ±1/32 | ±1/32 | ±1/32 |
4 | ±1/32 | ±1/32 | ±1/32 |
6 | ±1/32 | ±1/32 | ±3/64 |
8 | ±1/32 | ±1/8 | ±1/8 |
10 | ±1/8 | ±1/8 | ±1/8 |
12 | ±1/8 | ±1/8 | ±1/8 |
15 | ±1/8 | ±1/8 | ±1/8 |
TABLE 2 Tolerances for High-Silicon Iron Fittings
Note 1: 1 in. = 25.4 mm.
Size, in. | ID Tolerance, | OD Tolerance, | Stop Lug Depth |
11/2 | ±1/16 | ±1/16 | ±1/16 |
11/2 × 11/2 | ±1/16 | ±1/16 | ±1/16 |
2 | ±1/16 | ±1/16 | ±1/16 |
2 × 11/2 | ±1/16 | ±1/16 | ±1/16 |
2 × 2 | ±1/16 | ±1/16 | ±1/16 |
3 | ±1/16 | ±1/16 | ±1/16 |
3 × 11/2 | ±1/16 | ±1/16 | ±1/16 |
3 × 2 | ±1/16 | ±1/16 | ±1/16 |
3 × 3 | ±1/16 | ±1/16 | ±1/16 |
4 | ±1/16 | ±1/16 | ±1/16 |
4 × 11/2 | ±1/16 | ±1/16 | ±1/16 |
4 × 2 | ±1/16 | ±1/16 | ±1/16 |
4 × 3 | ±1/16 | ±1/16 | ±1/16 |
4 × 4 | ±1/16 | ±1/16 | ±1/16 |
TABLE 3 Chemical Composition
Element | Composition, Weight % | |
Grade 1 | Grade 2 | |
Carbon | 0.65–1.10 | 0.75–1.15 |
Manganese | 1.50 max | 1.50 max |
Silicon | 14.20–14.75 | 14.20–14.75 |
Chromium | 0.50 max | 3.25–5.00 |
Molybdenum | 0.50 max | 0.40-0.60 |
Copper | 0.50 max | 0.50 max |
FIG. 1 No-Hub Pipe (MJ)
Size, in. | J, in. | F, in. | t, in. |
11/2 | 23/16 (2.19) | 84 | 5/16 |
2 | 211/16 (2.69) | 84 | 5/16 |
3 | 349/64 (3.77) | 84 | 5/16 |
4 | 449/64 (4.77) | 84 | 5/16 |
Note 1: 1 in. = 25.4 mm.
FIG. 2 Quarter Bends
Size, in. | D, in. | ID, in. | OD, in. | Stop Lug |
11/2 | 41/4 | 11/2 | 23/16 (2.19) | 11/32 |
2 | 41/2 | 2 | 25/8 (2.62) | 11/32 |
2 × 11/2 | 43/16 × 41/2 | 2 × 11/2 | 25/8 × 23/16 | 11/32 |
3 | 5 | 3 | 33/4 (3.75) | 11/32 |
4 | 51/2 | 4 | 43/4 (4.75) | 11/32 |
Note 1: 1 in. = 25.4 mm.
FIG. 3 Sixth Bends
