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