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What is 904L Stainless Steel Butt Weld Cap
Basically when a pipeline need to close or shut down at its end, a cap will be used.Caps, plugs , and blind flanges share the same function. For example, 904L stainless steel cap will be applied when the connecting type of the pipeline is welding and the whole pipe or at least the end is of 904L material. Compared with the blind flanges, the main difference is the end cap is firmly fixed and can’t remove easily.
ASME B16.9 Steel Pipe Cap Dimensions
Stainless steel butt weld cap is commonly seamless because it is normally made from on whole steel plate,and the shape of them can be changed basing on customer need or drawing.When refer to the stainless steel 904L cap, the thickness schedule should always with-s, like sch20s, sch30s and so on. But the real thickness is basically same.
Size range: 1/2 to 56 inches (DN15 to DN1400).
Wall Thickness:sch10, sch20, sch30, std, sch40, sch60, xs, sch80, sch100, sch120, sch140, sch160, xxs, sch5s, sch20s, sch40s, sch80s
ASME B16.9 Stainless Steel Butt Weld Cap Dimensions Tolerance
Nominal Pipe Size | 1/2 to 2.1/2 | 3 to 3.1/2 | 4 | 5 to 8 |
Outside Diameter | 1.6 | 1.6 | 1.6 | 2.4 |
at Bevel (D) | -0.8 | -1.6 | ||
Inside Diameter at End | 0.8 | 1.6 | 1.6 | 1.6 |
Overall Length (H) | 3 | 3 | 3 | 6 |
Nominal Pipe Size | 10 to 18 | 20 to 24 | 26 to 30 | 32 to 48 |
Outside Diameter | 4 | 6.4 | 6.4 | 6.4 |
at Bevel (D) | -3.2 | -4.8 | -4.8 | -4.8 |
Inside Diameter at End | 3.2 | 4.8 | 6.4 | 6.4 |
-4.8 | -4.8 | |||
Overall Length (H) | 6 | 6 | 10 | 10 |
Wall Thickness (t) | Not less than 87.5% of Nominal Wall Thickness | |||
Please notices unit in millimeters and the tolerance is ± data.
Stainless Steel 904L Material Standard
Stainless steel 904L cap is manufactured from material 904L. Alloy 904L (UNS N08904) is a special kind of superaustenitic stainless steel.SS904L is processed to be used in various complex use environment ,which request SS904L have a strong resistance to high pressure and corrosivity. The key reason for upon advantage is because SS904L contains high chromium and nickel element,and coupled with additions of molybdenum and copper at the same time.
Chemical Composition of Stainless Steel 904L
C | Mn | P | S | Si | Cr | Ni | Mo | N | Cu | |
Min. | 19.0 | 24.0 | 3.00 | 1.20 | ||||||
Max. | 0.02 | 1.20 | 0.03 | 0.01 | 0.70 | 21.0 | 26.0 | 4.50 | 0.50 | 2.00 |
Weight List of Butt Weld Cap
DN | NPS | SCH20 | SCH30 | STD | SCH40S | XS | SCH80S | SCH160 | XXS |
15 | 1/2 | 0.04 | 0.04 | 0.04 | 0.06 | 0.06 | 0.08 | 0.11 | |
20 | 3/4 | 0.05 | 0.05 | 0.05 | 0.07 | 0.07 | 0.11 | 0.15 | |
25 | 1 | 0.1 | 0.12 | 0.12 | 0.16 | 0.16 | 0.22 | 0.32 | |
32 | 1-1/4 | 0.13 | 0.16 | 0.16 | 0.22 | 0.22 | 0.28 | 0.43 | |
40 | 1-1/2 | 0.16 | 0.19 | 0.19 | 0.26 | 0.26 | 0.36 | 0.52 | |
50 | 2 | 0.21 | 0.26 | 0.26 | 0.36 | 0.36 | 0.57 | 0.73 | |
65 | 2-1/2 | 0.4 | 0.44 | 0.44 | 0.59 | 0.59 | 0.8 | 1.18 | |
80 | 3 | 0.65 | 0.73 | 0.73 | 1.08 | 1.08 | 1.48 | 2.02 | |
90 | 3-1/2 | 0.9 | 1.07 | 1.07 | 1.51 | 1.51 | |||
100 | 4 | 1.04 | 1.3 | 1.3 | 1.85 | 1.85 | 2.91 | 3.69 | |
125 | 5 | 2.1 | 2.1 | 3.06 | 3.06 | 5.09 | 6.1 | ||
150 | 6 | 3.19 | 3.19 | 4.93 | 4.93 | 8.2 | 9.86 | ||
200 | 8 | 4.45 | 4.92 | 5.72 | 5.72 | 8.88 | 8.88 | 16.1 | 15.6 |
250 | 10 | 6.89 | 8.46 | 10.1 | 10.1 | 13.8 | 16.4 | 31 | 27.6 |
300 | 12 | 9.75 | 12.9 | 14.6 | 15.9 | 19.5 | 26.9 | 51.2 | 39 |
350 | 14 | 14.6 | 17.6 | 17.5 | 20.5 | 23.3 | 35 | 65.7 | |
400 | 16 | 18.3 | 22.1 | 22.1 | 29.4 | 29.4 | 49.7 | 93.8 | |
450 | 18 | 23.4 | 32.9 | 28.2 | 42.2 | 37.5 | 70.4 | 134 | |
500 | 20 | 35.1 | 46.8 | 35.1 | 55.6 | 46.8 | 96.5 | 184 | |
550 | 22 | 42.7 | 56.9 | 42.7 | 57 | 128 | 242 | ||
600 | 24 | 49.7 | 74.5 | 49.7 | 91.2 | 66.3 | 162 | 311 | |
650 | 26 | 74 | 55.6 | 74.1 | |||||
700 | 28 | 82.4 | 103 | 61.8 | 82.4 | ||||
750 | 30 | 91.2 | 114 | 68.5 | 91.2 | ||||
800 | 32 | 101 | 126 | 75.4 | 138 | 101 | |||
850 | 34 | 110 | 138 | 82.7 | 152 | 110 | |||
900 | 36 | 120 | 150 | 90.2 | 180 | 120 | |||
950 | 38 | 104 | 139 | ||||||
1000 | 40 | 113 | 150 | ||||||
1050 | 42 | 122 | 162 | ||||||
1100 | 44 | 138 | 184 | ||||||
1150 | 46 | 148 | 197 | ||||||
1200 | 48 | 158 | 210 |
Inspection of Stainless Steel Butt Weld Cap
(1)Visual the surface of buuweld fittings body. Such as dents, die marks, porosity, undercuts.
(2)Check the marking. Such as size, material code, material grade, thickness, heat no.
(3)Measure dimensions. Such as outside diameter, wall thickness, height from end to end.
(4)Test chemical properties of stainless steel butt weld cap.
What is 904L Stainless Steel Butt Weld Cap
Basically when a pipeline need to close or shut down at its end, a cap will be used.Caps, plugs , and blind flanges share the same function. For example, 904L stainless steel cap will be applied when the connecting type of the pipeline is welding and the whole pipe or at least the end is of 904L material. Compared with the blind flanges, the main difference is the end cap is firmly fixed and can’t remove easily.
ASME B16.9 Steel Pipe Cap Dimensions
Stainless steel butt weld cap is commonly seamless because it is normally made from on whole steel plate,and the shape of them can be changed basing on customer need or drawing.When refer to the stainless steel 904L cap, the thickness schedule should always with-s, like sch20s, sch30s and so on. But the real thickness is basically same.
Size range: 1/2 to 56 inches (DN15 to DN1400).
Wall Thickness:sch10, sch20, sch30, std, sch40, sch60, xs, sch80, sch100, sch120, sch140, sch160, xxs, sch5s, sch20s, sch40s, sch80s
ASME B16.9 Stainless Steel Butt Weld Cap Dimensions Tolerance
Nominal Pipe Size | 1/2 to 2.1/2 | 3 to 3.1/2 | 4 | 5 to 8 |
Outside Diameter | 1.6 | 1.6 | 1.6 | 2.4 |
at Bevel (D) | -0.8 | -1.6 | ||
Inside Diameter at End | 0.8 | 1.6 | 1.6 | 1.6 |
Overall Length (H) | 3 | 3 | 3 | 6 |
Nominal Pipe Size | 10 to 18 | 20 to 24 | 26 to 30 | 32 to 48 |
Outside Diameter | 4 | 6.4 | 6.4 | 6.4 |
at Bevel (D) | -3.2 | -4.8 | -4.8 | -4.8 |
Inside Diameter at End | 3.2 | 4.8 | 6.4 | 6.4 |
-4.8 | -4.8 | |||
Overall Length (H) | 6 | 6 | 10 | 10 |
Wall Thickness (t) | Not less than 87.5% of Nominal Wall Thickness | |||
Please notices unit in millimeters and the tolerance is ± data.
Stainless Steel 904L Material Standard
Stainless steel 904L cap is manufactured from material 904L. Alloy 904L (UNS N08904) is a special kind of superaustenitic stainless steel.SS904L is processed to be used in various complex use environment ,which request SS904L have a strong resistance to high pressure and corrosivity. The key reason for upon advantage is because SS904L contains high chromium and nickel element,and coupled with additions of molybdenum and copper at the same time.
Chemical Composition of Stainless Steel 904L
C | Mn | P | S | Si | Cr | Ni | Mo | N | Cu | |
Min. | 19.0 | 24.0 | 3.00 | 1.20 | ||||||
Max. | 0.02 | 1.20 | 0.03 | 0.01 | 0.70 | 21.0 | 26.0 | 4.50 | 0.50 | 2.00 |
Weight List of Butt Weld Cap
DN | NPS | SCH20 | SCH30 | STD | SCH40S | XS | SCH80S | SCH160 | XXS |
15 | 1/2 | 0.04 | 0.04 | 0.04 | 0.06 | 0.06 | 0.08 | 0.11 | |
20 | 3/4 | 0.05 | 0.05 | 0.05 | 0.07 | 0.07 | 0.11 | 0.15 | |
25 | 1 | 0.1 | 0.12 | 0.12 | 0.16 | 0.16 | 0.22 | 0.32 | |
32 | 1-1/4 | 0.13 | 0.16 | 0.16 | 0.22 | 0.22 | 0.28 | 0.43 | |
40 | 1-1/2 | 0.16 | 0.19 | 0.19 | 0.26 | 0.26 | 0.36 | 0.52 | |
50 | 2 | 0.21 | 0.26 | 0.26 | 0.36 | 0.36 | 0.57 | 0.73 | |
65 | 2-1/2 | 0.4 | 0.44 | 0.44 | 0.59 | 0.59 | 0.8 | 1.18 | |
80 | 3 | 0.65 | 0.73 | 0.73 | 1.08 | 1.08 | 1.48 | 2.02 | |
90 | 3-1/2 | 0.9 | 1.07 | 1.07 | 1.51 | 1.51 | |||
100 | 4 | 1.04 | 1.3 | 1.3 | 1.85 | 1.85 | 2.91 | 3.69 | |
125 | 5 | 2.1 | 2.1 | 3.06 | 3.06 | 5.09 | 6.1 | ||
150 | 6 | 3.19 | 3.19 | 4.93 | 4.93 | 8.2 | 9.86 | ||
200 | 8 | 4.45 | 4.92 | 5.72 | 5.72 | 8.88 | 8.88 | 16.1 | 15.6 |
250 | 10 | 6.89 | 8.46 | 10.1 | 10.1 | 13.8 | 16.4 | 31 | 27.6 |
300 | 12 | 9.75 | 12.9 | 14.6 | 15.9 | 19.5 | 26.9 | 51.2 | 39 |
350 | 14 | 14.6 | 17.6 | 17.5 | 20.5 | 23.3 | 35 | 65.7 | |
400 | 16 | 18.3 | 22.1 | 22.1 | 29.4 | 29.4 | 49.7 | 93.8 | |
450 | 18 | 23.4 | 32.9 | 28.2 | 42.2 | 37.5 | 70.4 | 134 | |
500 | 20 | 35.1 | 46.8 | 35.1 | 55.6 | 46.8 | 96.5 | 184 | |
550 | 22 | 42.7 | 56.9 | 42.7 | 57 | 128 | 242 | ||
600 | 24 | 49.7 | 74.5 | 49.7 | 91.2 | 66.3 | 162 | 311 | |
650 | 26 | 74 | 55.6 | 74.1 | |||||
700 | 28 | 82.4 | 103 | 61.8 | 82.4 | ||||
750 | 30 | 91.2 | 114 | 68.5 | 91.2 | ||||
800 | 32 | 101 | 126 | 75.4 | 138 | 101 | |||
850 | 34 | 110 | 138 | 82.7 | 152 | 110 | |||
900 | 36 | 120 | 150 | 90.2 | 180 | 120 | |||
950 | 38 | 104 | 139 | ||||||
1000 | 40 | 113 | 150 | ||||||
1050 | 42 | 122 | 162 | ||||||
1100 | 44 | 138 | 184 | ||||||
1150 | 46 | 148 | 197 | ||||||
1200 | 48 | 158 | 210 |
Inspection of Stainless Steel Butt Weld Cap
(1)Visual the surface of buuweld fittings body. Such as dents, die marks, porosity, undercuts.
(2)Check the marking. Such as size, material code, material grade, thickness, heat no.
(3)Measure dimensions. Such as outside diameter, wall thickness, height from end to end.
(4)Test chemical properties of stainless steel butt weld cap.
