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ASTM A795/A795M-13

Standard Specification for Black and Hot-Dipped Zinc-Coated (Galvanized) Welded and Seamless Steel Pipe for Fire Protection Use

1.1 This specification covers black and hot-dipped galvanized welded and seamless steel pipe in NPS 1/2 to NPS 10, inclusive [DN 15 to DN 250, inclusive] (Note 1), with wall thicknesses as given in Table 1 and Table 2. Pipe having other wall thicknesses may be furnished provided such pipe complies with all other requirements of this specification and the outside diameter is as given in Table 2. Pipe ordered under this specification is intended for use in fire protection systems. The pipe may be bent, but it is not intended for bending made at ambient temperature wherein the inside diameter of the bend is less than twelve times the outside diameter of the pipe being bent (Note 2).

Note 1—The dimensionless designators NPS (nominal pipe size) and DN (nominal diameter) have been substituted in this standard for such traditional terms as “nominal diameter,” “size,” and “nominal size.”
A Schedule 10 corresponds to Schedule 10S as listed in ANSI B36.19 for NPS 3/4 through 6 [DN 20 through 150] only.
B Furnace-welded pipe is not made in sizes larger than NPS 4 [DN 100].
C Not Schedule 10.
A NPS 1/2 through 6 [DN 15 through 150]—Schedule 40; NPS 8 and 10 [DN 200 and 250]—Schedule 30.
B Based on 20-ft [6.1-m] lengths.
C Furnace-welded pipe is not made in sizes larger than NPS 4 [DN 100].
Note 2—Successful bending of pipe is a function of equipment and technique as well as pipe properties.

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