ANSI B16.5 Lap Joint Flanges
ANSI B16.5 Lap Joint Flanges are similar to a Slip On flange. The main difference is at the radius located at the intersection on the face of the lap joint flange and the bore which has the ability to accommodate the flanged portion of the Stub End. While a Lap joint flange is not manufactured with a raised face, they are used in tandem with a stub end. The load or pressure bearing ability of a Lap joint flange is only slightly better than a slip on flange. Whereas in comparison to Welding Neck flanges, the fatigue life of this component is only one tenth that of the former. A Carbon steel lap joint flange is slipped over a pipe and is seated on the back of the stub end. Both the flange and the stub end are held together by the pressure of the bolts.
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ASME B16.5 Lap Joint Flanges
Stainless Steel Lap Joint Flanges
Carbon Steel Lap Joint Flanges
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Since the use of lap joint flanges includes a separate stub end component, the two-piece Lap joint flange connection works out to be a cost-effective solution. This is noticed especially when the alloys used in their manufacture can be of a lower grade e.g. carbon steel in comparison to the material of the stub end. As the material to make the stub end is required to match the pipe grade, due to its contact with the conveyed fluid, particularly for piping systems that are stainless steel or nickel alloy based.
Using a PN16 Lap Joint Flange can have certain special advantages, such as :
- Freedom for the flange to swivel around the pipe, which in turn facilitates the alignment of opposing flange bolt holes.
- Lack of contact between the flange and the fluid in the pipe often permits the manufacturer to use inexpensive carbon steel in conjunction with a corrosion resistant pipe.
- In piping systems where erosion or corrosion could occur rapidly, the Stainless steel lap joint flange could be salvaged for re-use.
Specifications Chart of ASME B16.5 Lap Joint Flanges
| ASME B16.5 Lap Joint Flanges Size Chart | 1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000 |
|---|---|
| Lap Joint Flanges Standards | ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, GOST Flange, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092 |
| UNI | 6Bar 10Bar 16Bar 25Bar 40Bar |
| EN | 6Bar 10Bar 16Bar 25Bar 40Bar |
| Lap Joint Flanges Pressure Rating ANSI | Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS |
| Lap Joint Flanges Pressure Calculation in DIN | 6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64 |
| JIS | 5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K |
| Test Certificates | EN 10204/3.1B Raw Materials Certificate 100% Radiography Test Report Third Party Inspection Report, etc |
| Coating | Oil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent, Cold and Hot Dip Galvanized |
| Most common types of Lap Joint Flanges | forged / Threaded / Screwed / Plate |
| Production technique |
|
| Connect Type/ Flange Face Type | Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), Large Male-Female (LMF), Lap-Joint Face (LJF), Small Male-Female (SMF), Small Tongue, Large Tongue & Groove, , Groove |
| Special design | As per your drawing
AS, ANSI, BS, DIN and JIS |
| Origin | Indian / West Europe / Japan / USA / Korean |
| Manufacturer of | ANSI DIN, GOST, JIS, UNI, BS, AS2129, AWWA, EN, SABS, NFE etc. Lap Joint Flanges: -BS Flange, EN Flange, API 6A Flange, ANSI Flange, ASME Flange, DIN Flange, EN1092-1 Flange, UNI Flange, JIS/ KS Flange, BS4504 Flange, GB Flange, AWWA C207 Flange, GOST Flange, PSI Flange
|
| Test | Direct-reading Spectrograph, Hydrostatic testing machine, X-ray detector, UI trasonic flaw detector, Magnetic particle detector |
| Equipment | Press machine, Bending machine, Pushing Machine, electric bevelling machine, Sand-blasting machine etc |
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Dimensions of ANSI B16.5 Lap Joint Flanges
| Nominal Bore Lap Joint Flanges | Dia.(D) | Thick.(E) | Dia.(B) | Dia.(A) | Height(H) | Nbr | Holes | Dia.(C) |
|---|---|---|---|---|---|---|---|---|
|
1/2″
|
90
|
11.2
|
30
|
22.9
|
16
|
4
|
15.87
|
60.3
|
|
3/4″
|
100
|
12.7
|
38
|
28.2
|
16
|
4
|
15.87
|
69.9
|
|
1″
|
110
|
14.3
|
49
|
34.9
|
17
|
4
|
15.87
|
79.4
|
|
1 1/4″
|
115
|
15.9
|
59
|
43.7
|
21
|
4
|
15.87
|
88.9
|
|
1 1/2″
|
125
|
17.5
|
65
|
50.0
|
22
|
4
|
15.87
|
98.4
|
|
2″
|
150
|
20.7
|
78
|
62.5
|
25
|
4
|
19.05
|
120.7
|
|
2 1/2″
|
180
|
22.3
|
90
|
75.4
|
29
|
4
|
19.05
|
139.7
|
|
3″
|
190
|
23.9
|
108
|
91.4
|
30
|
4
|
19.05
|
152.4
|
|
3 1/2″
|
215
|
23.9
|
122
|
104.1
|
32
|
8
|
19.05
|
177.8
|
|
4″
|
230
|
23.9
|
135
|
116.8
|
33
|
8
|
19.05
|
190.5
|
|
5″
|
255
|
23.9
|
164
|
144.4
|
36
|
8
|
22.22
|
215.9
|
|
6″
|
280
|
25.4
|
192
|
171.4
|
40
|
8
|
22.22
|
241.3
|
|
8″
|
345
|
28.6
|
246
|
222.2
|
44
|
8
|
22.22
|
298.5
|
|
10″
|
405
|
30.2
|
305
|
277.4
|
49
|
12
|
25.40
|
362.0
|
|
12″
|
485
|
31.8
|
365
|
328.2
|
56
|
12
|
25.40
|
431.8
|
|
14″
|
535
|
35.0
|
400
|
360.2
|
79
|
12
|
28.57
|
476.3
|
|
16″
|
595
|
36.6
|
457
|
411.2
|
87
|
16
|
28.57
|
539.8
|
|
18″
|
635
|
39.7
|
505
|
462.3
|
97
|
16
|
31.75
|
577.9
|
|
20″
|
700
|
42.9
|
559
|
514.4
|
103
|
20
|
31.75
|
635.0
|
|
24″
|
815
|
47.7
|
663
|
616.0
|
111
|
20
|
34.92
|
749.3
|
Check lap joint flange pressure rating, lap joint flat face flange dimensions, lap joint flanges weight
Price List of Lap Joint Flanges
| Types of Lap Joint flanges | Price | Unit |
|---|---|---|
| stainless steel Lap Joint flanges class 150 | $22.45 | NOS |
| stainless steel Lap Joint flanges class 300 | $25.39 | NOS |
| stainless steel Lap Joint flanges class 600 | $31.19 | NOS |
| carbon steel Lap Joint flanges class 150 | $75.89 | NOS |
| carbon steel Lap Joint flanges class 300 | $88.12 | NOS |
| carbon steel Lap Joint flanges class 600 | $99.52 | NOS |
| Lap Joint flanges ansi b16 5 class 150 | $75.56 | NOS |
| Lap Joint flanges ansi b16 5 class 300 | $95.56 | NOS |