Benefits of Duplex Lapped Joint Flanges:
- Lapped Joint flanges have certain special advantages over other flanges. These are as follows:
- Lapped Joint flanges include the freedom to swivel around the pipe. This facilitates the lining up of opposing flange bolt holes.
- Lack of contact with the fluid within the pipe leads to the superior stability of these flanges.
- In piping systems which corrode or erode quickly, the lap joint flanges may be salvaged for re-use.
- The pressure-holding capacity of lap joint flanges is little. But it is better than that of slip-on flanges.
- The Lapped Joint works as a backing ring on the stub.
- The main advantage of lapped joint flange is that the bolt holes can be aligned with the matching flange after the welds have been completed.
- They allow rotational alignment capability.

Usage: These Duplex Lapped Joint Flanges are always used with either a stub end or Taft which is butt welded to the pipe with the flange loose behind it. This means the stub end or Taft always makes the face. The lapped joint is favored in low pressure applications because it is easily assembled and aligned.
Specification of Duplex Steel Lapped Joint Flanges
- Specifications : ASTM A182/ ASME SA182
- Size : 1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000
- Dimensions : 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 SP44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092
- Pressure Rating : Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS
- 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
Equivalent Grades of Duplex Steel Lapped Joint Flanges
STANDARD | WERKSTOFF NR. | UNS |
---|---|---|
Duplex 2205 | 1.4462 | S31803/S32205 |
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We offer These Duplex Steel Lapped Joint Flanges, LJF, Lap Joint Flanges as per ASTM, ASME and API.
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Exporter of Duplex Steel Lapped Joint Flange in the following Destinations
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