Integrally Reinforced Branch Connections (weld olet) minimum weld thickness

[Gokul Vijay]

The minimum weld required for olet to run pipe as described below as per ASME 31.3, but if same followed for SS run pipe , there be distortion.
so is there any excuse for SS olet welding.

328.5.4 Welded Branch Connections
(i) Figure 328.5.4F shows additional integrally reinforced branch connections typical of MSS SP-97 fittings that abut the outside of the run attached by a full penetration groove weld. The welds shall be finished with cover fillets having a throat dimension not less than tc. The cover fillet weld shall fill and smoothly transition to the attachment weld and run pipe or fitting.

 

[GBTorpenhow]

Several vendors offer 'light wall' design olets to help mitigate this issue, they are usually only rated for S/10 headers and/or limited to CL300 service.

 

[XL83NL]

What standard are those fittings made to GBT? Got a supplier catalogue or something? Not sure if the code sees them as integrally reinforced.

Huub
- You never get what you expect, you only get what you inspect.

 

[GBTorpenhow]

https://bonneyforge.com/specs/branch/flexolet_lightwall.pdf

https://www.woihouston.com/uploads/7/2/1/5/7215847/lwvbwb.pdf

http://wfi-intl.com/uploads/docs/lightweightpipetspec.pdf

I have one from Penn on the shelf too but can't find a cut on their website, they might have some goofy proprietary name for it like everyone else.