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ASTM A795 / ASME SA795 / Black and Hot-Dipped Zinc Coated (Galvanized) Welded and Seamless Steel Pipe supplier & distributor in India

PIPE & TUBE ASTM STANDARDS

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ASTM A 795 / ASME SA 795 

STANDARD SPECIFICATION FOR BLACK AND HOT-DIPPED ZINC COATED(GALVANIZED)
WELDED AND SEAMLESS STEEL PIPE FOR FIRE PROTECTION USE1

1. Scope

1.1 This specification covers black and got-dipped galvanized welded and seamless steel pipe in sizes NPS 1/2(Note 1) to NPS 10 inclusive, with wall thickness as given in Talbes 2 and 3.

Pipe having other wall thicknesses may be furnished provided such pipe complies with all other requirements of this specification and the outside diametr is limited to those in the talbes. Pipe ordered under this specification is intended for use in fire protection systems. 

The pipe may ve bent, but it is not intended for bending made at ambient tmeperature where in the inside diameter of the bend is less than twelve times the outside diameter of the pipe bing bent(Note2). 

Note 1- the diamensionless designator NPS(nominal pipe size)gas been substituted in this standard for such traditional terms as "nominla diameter," "size," and "nominla size." Note 2- Successful bending of pipe is a function of equipment and technique as well a spipe properties. 


1.2 This pipe is suitable for hoining by the following methods : 

1.2.1 Light-Weight fire Protection Pipe-Rolled groove, welding, and gittings for plain end pipe. See Table 2 for dimensions. 

1.2.2 Standard-Weight fire Protection Fire Protection Pipe-Cut or rolled groove, threading, welding and gittings for plain end pipe. See Table 3 for dimensions. 

1.2.3 for pipe having dimensions other than those of Talbes 2 and 3, the hoining method must be compatile with the pipe dimensions. a complete lising of standard light weight dimensions appears in ANSI b36.10 and B36.19. 


1.3 The following precautionary caveat pertains only to the test method portion, Sections 8, 9, and 10, of this specification : This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responibillity of the user of this standard to establish appropriate safety and gealth practices and determine the applicability of regulatory limitaions prior to use.




Chemical composition


  Composition, max, %
C Mn P S
Type e(electric-resistance-welded) & Type S(seamless pipe)
Open-hearth, electric-fumace or basic-oxygen:
Grade A 0.25 0.95 0.035 0.035
Grade B 0.30 1.20 0.035 0.035
Type F(furnace welded pipe)
Open-hearth, electric-fumace, or basic oxygen 0.050 0.045





Mechanical Properties 
TABLE 2 Dimesions, Weights, 
and Test Pressure For Light file Protection Pipe-Schedule 10A


NPS Designator Outside Diameter Nominal Wall Thickness Weight Plain End Test Pressures
Fumace-Welded Seamless and Electric-Resistance Weld
in. mm in. mm lb/ft kg/m psi MPa psi MPa
3/4 1.050 26.7 0.08. 2.11 0.86 1.28 500 3.45 700 4.83
1 1.315 33.4 0.109 2.77 1.40 2.1 500 3.45 700 4.83
1 1/4 1.660 42.1 0.109 2.77 1.81 2.72 500 3.45 1000 6.89
1 1/2 1.900 48.3 0.109 2.77 2.08 3.12 500 3.45 1000 6.89
2 2.375 60.3 0.109 2.77 2.64 3.96 500 3.45 1000 6.89
2 1/2 2.875 73.0 0.120 3.05 3.53 5.30 500 3.45 1000 6.89
3 3.500 88.9 0.120 3.05 4.33 6.50 500 3.45 1000 6.89
3 1/2 4.000 101.6 0.120 3.05 4.97 7.46 500 3.45 1200 8.27
4 4.500 114.3 0.120 3.05 5.61 8.36 500 3.45  1200 8.27
5 5.563 141.3 0.134 3.40 7.77 11.58 B B 1200 8.27
6 6.625 168.3 0.134 3.40 9.29 13.84 B B 1000 6.89
8 8.625 219.1 0.188C 4.8 16.94 25.41 B B 800 5.51
10 10.750 273.0 0.188C 4.8 21.21 31.82 B B 700 4.83

 
ASchedule 10 corresponds to Schedule 10S as listed in ANSI B36.19 for NPS 3/4 through 6 only. 
 BFumace-welded pipe is not amde in sizes larger than NPS 4.  CNOt Schedule 10. 



TABLE3 Dimensions, Weight, Test Pressures For Standard-Weight 
Fire Protection Pipe-Schedule 30 and Schedule 40
 

NPS Designator Outside Diameter Nominal Wall ThicknessC Weight Plain End Weight Thread And CouplingsA Test Pressure
Fumace-Welded Seamless and Electric-Resistance Weld
in. mm in. mm lb/ft kg/m lb/ft kg/m psi MPa psi MPa
1/2 0.840 21.3 0.109 2.77 0.85 1.27 0.85 1.27 700 4.83 700 4.83
3/4 1.050 26.7 0.113 2.87 1.13 1.68 1.13 1.68 700 4.83 700 4.83
1 1.315 33.4 0.133 3.38 1.68 2.50 1.68 2.50 700 4.83 700 4.83
1 1/4 1.660 42.1 0.140 3.56 2.27 3.38 2.28 3.38 1000 6.89 1000 6.89
1 1/2 1.900 48.3 0.145 3.68 2.72 4.05 2.73 4.06 1000 6.89 1000 6.89
2 2.375 60.3 0.154 3.91 3.65 5.43 3.68 5.48 1000 6.89 1000 6.89
2 1/2 2.875 73.0 0.203 5.16 5.79 8.62 5.82 8.66 1000 6.89 1000 6.89
3 3.500 88.9 0.216 5.49 7.58 11.28 7.62 11.34 1000 6.89 1000 6.89
3 12 4.00 101.6 0.226 5.74 9.11 13.56 9.20 13.68 1200 8.27 1200 8.27
4 4.500 114.3 0.237 6.02 10.79 16.06 10.90 16.22 1200 8.27 1200 8.27
5 5.563 141.3 0.258 6.55 14.62 21.76 14.81 22.04   B B 1200 8.27
6 6.625 168.3 0.280 7.11 18.97 28.34 19.18 28.66   B B 1200 8.27
8 8.625 219.1 0.277C 7.04 24.70 36.90 25.55 38.17   B B 1200 8.27
10 10.750 273.0 0.277C 7.80 34.24 51.16 35.75 53.41   B B 1000 6.89


 ABased on 20-ft(6.1-m)lengths.  BFumace-welded pipe is not made in sizes larger than NPS 4.  
CNPS 1/2 through 6-Schedule 40; NPS 8 and 10-Schedule 30.


TABLE3 Dimensions, Weight, Test Pressures For Standard-Weight Fire Protection
Pipe Schedule 30 and Schedule 40
 

NPS Designator Outside Diameter Nominal Wall ThicknessC Weight Plain End Weight Thread And CouplingsA Test Pressure
Fumace-Welded Seamless and Electric-Resistance Weld
in. mm in. mm lb/ft kg/m lb/ft kg/m psi MPa psi MPa
1/2 0.840 21.3 0.109 2.77 0.85 1.27 0.85 1.27 700 4.83 700 4.83
3/4 1.050 26.7 0.113 2.87 1.13 1.68 1.13 1.68 700 4.83 700 4.83
1 1.315 33.4 0.133 3.38 1.68 2.50 1.68 2.50 700 4.83 700 4.83
1 1/4 1.660 42.1 0.140 3.56 2.27 3.38 2.28 3.38 1000 6.89 1000 6.89
1 1/2 1.900 48.3 0.145 3.68 2.72 4.05 2.73 4.06 1000 6.89 1000 6.89
2 2.375 60.3 0.154 3.91 3.65 5.43 3.68 5.48 1000 6.89 1000 6.89
2 1/2 2.875 73.0 0.203 5.16 5.79 8.62 5.82 8.66 1000 6.89 1000 6.89
3 3.500 88.9 0.216 5.49 7.58 11.28 7.62 11.34 1000 6.89 1000 6.89
3 12 4.00 101.6 0.226 5.74 9.11 13.56 9.20 13.68 1200 8.27 1200 8.27
4 4.500 114.3 0.237 6.02 10.79 16.06 10.90 16.22 1200 8.27 1200 8.27
5 5.563 141.3 0.258 6.55 14.62 21.76 14.81 22.04   B B 1200 8.27
6 6.625 168.3 0.280 7.11 18.97 28.34 19.18 28.66   B B 1200 8.27
8 8.625 219.1 0.277C 7.04 24.70 36.90 25.55 38.17   B B 1200 8.27
10 10.750 273.0 0.277C 7.80 34.24 51.16 35.75 53.41   B B 1000 6.89


 ABased on 20-ft(6.1-m)lengths.  BFumace-welded pipe is not made in sizes larger than NPS 4.  
CNPS 1/2 through 6-Schedule 40; NPS 8 and 10-Schedule 30. 

TABLE 1 Chemical Requirements 

Composition, max, %
C Mn P S
Type E (electric-resistance-welded) & Type S(seamless pipe)
Open-hearth, electric-fumace or basic-oxygen:
Grade A 0.25 0.95 0.035 0.035
Grade B 0.30 1.20 0.035 0.035
Type F(furnace welded pipe)
Open-hearth, electric-fumace, or basic oxygen 0.050 0.045




TABLE 2 Dimesions, Weights, and Test Pressure For Light file Protection
Pipe Schedule 10A
 

NPS Designator Outside Diameter Nominal Wall Thickness Weight Plain End Test Pressures
Fumace-Welded Seamless and Electric-Resistance Weld
in. mm in. mm lb/ft kg/m psi MPa psi MPa
3/4 1.050 26.7 0.08. 2.11 0.86 1.28 500 3.45 700 4.83
1 1.315 33.4 0.109 2.77 1.40 2.1 500 3.45 700 4.83
1 1/4 1.660 42.1 0.109 2.77 1.81 2.72 500 3.45 1000 6.89
1 1/2 1.900 48.3 0.109 2.77 2.08 3.12 500 3.45 1000 6.89
2 2.375 60.3 0.109 2.77 2.64 3.96 500 3.45 1000 6.89
2 1/2 2.875 73.0 0.120 3.05 3.53 5.30 500 3.45 1000 6.89
3 3.500 88.9 0.120 3.05 4.33 6.50 500 3.45 1000 6.89
3 1/2 4.000 101.6 0.120 3.05 4.97 7.46 500 3.45 1200 8.27
4 4.500 114.3 0.120 3.05 5.61 8.36 500 3.45  1200 8.27
5 5.563 141.3 0.134 3.40 7.77 11.58 B B 1200 8.27
6 6.625 168.3 0.134 3.40 9.29 13.84 B B 1000 6.89
8 8.625 219.1 0.188C 4.8 16.94 25.41 B B 800 5.51
10 10.750 273.0 0.188C 4.8 21.21 31.82 B B 700 4.83


 ASchedule 10 corresponds to Schedule 10S as listed in ANSI B36.19 for NPS 3/4 through 6 only. 
 BFumace-welded pipe is not amde in sizes larger than NPS 4.  CNOt Schedule 10.



TABLE3 Dimensions, Weight, Test Pressures For Standard-Weight Fire Protection 
Pipe Schedule 30 and Schedule 40


NPS Designator Outside Diameter Nominal Wall ThicknessC Weight Plain End Weight Thread And CouplingsA Test Pressure
Fumace-Welded Seamless and Electric-Resistance Weld
in. mm in. mm lb/ft kg/m lb/ft kg/m psi MPa psi MPa
1/2 0.840 21.3 0.109 2.77 0.85 1.27 0.85 1.27 700 4.83 700 4.83
3/4 1.050 26.7 0.113 2.87 1.13 1.68 1.13 1.68 700 4.83 700 4.83
1 1.315 33.4 0.133 3.38 1.68 2.50 1.68 2.50 700 4.83 700 4.83
1 1/4 1.660 42.1 0.140 3.56 2.27 3.38 2.28 3.38 1000 6.89 1000 6.89
1 1/2 1.900 48.3 0.145 3.68 2.72 4.05 2.73 4.06 1000 6.89 1000 6.89
2 2.375 60.3 0.154 3.91 3.65 5.43 3.68 5.48 1000 6.89 1000 6.89
2 1/2 2.875 73.0 0.203 5.16 5.79 8.62 5.82 8.66 1000 6.89 1000 6.89
3 3.500 88.9 0.216 5.49 7.58 11.28 7.62 11.34 1000 6.89 1000 6.89
3 12 4.00 101.6 0.226 5.74 9.11 13.56 9.20 13.68 1200 8.27 1200 8.27
4 4.500 114.3 0.237 6.02 10.79 16.06 10.90 16.22 1200 8.27 1200 8.27
5 5.563 141.3 0.258 6.55 14.62 21.76 14.81 22.04   B B 1200 8.27
6 6.625 168.3 0.280 7.11 18.97 28.34 19.18 28.66   B B 1200 8.27
8 8.625 219.1 0.277C 7.04 24.70 36.90 25.55 38.17   B B 1200 8.27
10 10.750 273.0 0.277C 7.80 34.24 51.16 35.75 53.41   B B 1000 6.89


 ABased on 20-ft(6.1-m)lengths.  BFumace-welded pipe is not made in sizes larger than NPS 4.  
CNPS 1/2 through 6-Schedule 40; NPS 8 and 10-Schedule 30.

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