A Nipoflange is a weldolet-type branch outlet and a flange forged as one piece: the reinforced branch that saddles onto the header, and the bolted face that closes it, with no nipple and no weld between them. It removes a joint from the branch and shortens the stack-up.
It is a drawing-controlled part, not a table item. Header size and branch size have to be given as a pair, together with the pressure class, facing and bore. Reinforcement profile and neck height follow the branch connection specification you work to, and materials are matched to the header and branch pipe against the standard cited on the drawing.
Header fit-up and bore alignment are the geometry that decides feasibility: the saddle has to match the run pipe OD, and the bore has to line up through the reinforcement. Machining allowance is agreed before cutting. Inspection covers bore alignment and a dimensional report, with MTC 3.1, UT, MT or PT, and PMI when an alloy grade is specified.
Product family: Custom Forged Components
Nipoflange requests are reviewed using branch and header size, outlet geometry, standard or drawing, material, pressure rating, machining and inspection requirements.
| Scope and rating | |
|---|---|
| Branch connection scope | Nipoflange RFQs combine branch outlet geometry with a flanged connection; header and branch sizes must both be clear. |
| Standards and materials | |
| Standards / drawings |
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| Material grades |
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| Geometry, tolerance and inspection | |
| Size and rating review | Header size, branch size, Class rating, facing and bore are checked against drawing or project branch standard. |
| Critical dimensions | Neck height, branch bore, header fit-up, reinforcement profile, flange face, bolt pattern and machining allowance. |
| Inspection depth | Bore alignment, dimensional report, MTC 3.1, UT/MT/PT and PMI when alloy grade is specified. |
| Reviewed before quotation |
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| Buying logic | |
| Best-fit RFQ | Best for flanged branch outlet RFQs where a weldolet-style branch and flange connection are integrated. |
| Buyer application | Pressure piping branches, vessel nozzles, high-pressure outlets and compact branch connections. |
Your standard, drawing revision and project specification govern.
Also known as
We confirm each step against your drawing or standard before we quote.
Material grade, heat number, certificate basis and substitution limits are checked against the Nipoflanges drawing or standard before procurement is released.
The forging route is selected around the drawing shape, section changes, forming direction, stock allowance and final machining datum scheme.
Heat treatment is planned with the required record package, mechanical testing basis and impact-test condition where low-temperature or alloy service applies.
Rough machining establishes the drawing datums and reference faces needed to control allowance before the final contour or bore work starts.
Final machining controls the drawing datums, bores, profiles, faces and critical tolerances defined by the buyer's revision-controlled drawing.
Inspection covers dimensional report, MTC 3.1, PMI and required UT, MT or PT records before the release documents are matched to the purchase order.
Marking, packing and export documents are prepared by PO line item so the Nipoflanges shipment can clear customs and be identified at site receiving.
List document requirements in the first RFQ; they affect price and schedule.
The nipple and the weld between outlet and flange. A Nipoflange is a weldolet-type branch outlet and a flange forged as one piece, so it removes a joint from the branch and shortens the stack-up.
Because header fit-up decides feasibility: the saddle has to match the run pipe OD, and the bore has to line up through the reinforcement. Send both sizes with the pressure class, facing and bore.
The branch connection specification you work to. We take neck height, reinforcement profile, branch bore, flange face and bolt pattern from your drawing, and agree the machining allowance before cutting.
Yes. Inspection covers bore alignment and a dimensional report with MTC 3.1, plus UT, MT or PT where the specification requires them and PMI when an alloy grade is specified.
Email quote@bldforgedirect.com with standard, drawing, material, quantity and inspection requirements.