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[8] STAINLESS STEEL BUTTWELD FITTINGS & FLANGES
Specifications
Stainless Steel Butt Weld Fittings are made from the finest quality stainless steel designed to be dimensionally precise. The
advantages of these fittings are its high tensile strength, robust nature and rust free properties.
AAP supplies Stainless Steel butt-weld fittings made from welded stainless steel pipe which is manufactured from 2B or HRAP
stainless steel strip, which is formed to shape and longitudinally welded to complete the pipe.
Stainless steel butt-weld fittings are most commonly used in refinery complexes, chemical production and petrochemical
engineering.
MATERIAL SPECIFICATIONS - ASTM A182 F316L - ASTM A182 F316
Chemical Composition of ASTM A182 F316L Stainless Steel Buttweld
C MAX (%) Si MAX (%)
Mn MAX
(%)
P MAX (%)
S MAX (%)
Cr (%)
Mo (%)
Ni (%)
N MAX (%)
0.03
1
2.00
0.05
0.03
16.00-18.00 2.00-3.00 10.00-15.00
0.1
Mechanical Properties of ASTM A182 F316L Stainless Steel Buttweld at Room Temperature
Tensile Strength N/mm_
Yield Point Rp0.2 N/mm_
≥
A5 %
≥
≥
485
170.00
30.00
*Note: For Sections over 2 in (50mm) in thickness, the minimum tensile strength shall be 106ksi and the minimum yield strength shall be 75ksi
Wall Thickness ASTM A312M
PIPE SIZE
Schedule 10S
Schedule 40S
304/304L & 316/316L
304/304L & 316/316L
NPS
OUTSIDE DIAMETER
WALL THICKNESS
(mm)
OUTSIDE DIAMETER WALL THICKNESS (mm)
1/8
10.29
1.24
10.29
1.73
1/4
13.72
1.65
13.72
2.24
3/8
17.15
1.65
17.15
2.31
1/2
21.34
2.11
21.34
2.77
3/4
26.67
2.11
26.67
2.87
1
33.41
2.77
33.41
3.38
1 1/4
42.16
2.77
42.16
3.56
1 1/2
48.26
2.77
48.26
3.68
2
60.3
2.77
60.3
3.91
2 1/2
73.03
3.05
73.03
5.16
3
88.9
3.05
88.9
5.49
4
114.3
3.05
114.3
6.02
6
168.28
3.40
168.28
7.11
8
219.18
3.76
219.18
8.18
Standard Tolerances ANSI B-16.9
ALL FITTINGS
90-DEG AND
45-DEG ELBOWS
AND TEES
REDUCERS
NOMINAL PIPE
SIZE INCH
OUTSIDE
DIAMETER AT
END
INSIDE DIAMETER
AT END
WALL THICKNESS CENTRE TO END OVERALL LENGTH
1/2 TO 2 1/2
+ 1/16
± 1/32
NOT LESS THAN
87.5% OF NOMINAL
THICKNESS
± 1/16
±1/16
- 1/32
3 TO 4
±1/16
±1/16
5 TO 8
+ 3/32
- 1/16
10 TO 18
+ 5/32
± 1/8
± 3/32
± 3/32
-1/8
20 TO 24
+1/4
± 3/16
-3/16
