An anchor flange is a heavy forged collar welded into a pipeline and cast into a concrete block or fixed to a steel structure. Its job is not to seal a joint but to take axial thrust out of the line at a bend, a riser or a change of section, so the pipe cannot walk.
Every one is drawing-controlled. Pipe OD and bore have to match the line pipe exactly, the weld ends are bevelled to the pipe wall, and the thrust-collar dimensions follow the restraint duty the designer calculated. The drawing and pipeline design basis define the restraint direction, load-transfer interface and the dimensions to inspect.
The work is oil and gas transmission lines, compressor stations and special restraint assemblies, buried or above ground. Weld-end geometry is what the field crew will judge the part on, so it is measured and reported. Inspection is a dimensional report, UT or MT, the weld-end check, MTC 3.1 and marking, with the coating or packing scope agreed from the drawing.
Product family: Flanges
Anchor flange RFQs are reviewed by drawing, pipeline specification, material, bore, thickness, machining and inspection requirements.
| Scope and rating | |
|---|---|
| Pipeline restraint scope | The approved project drawing and pipeline design basis control the anchor flange, its weld ends, thrust collar and load-transfer interfaces. |
| Supplied variants |
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| Standards and materials | |
| Standards / drawings |
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| Material grades |
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| Geometry, tolerance and inspection | |
| Design inputs | Pipe OD and wall thickness, bore fit, axial design loads, restraint direction and the concrete-block or steel-support interface must be reviewed together. |
| Drawing references | Approved project drawing and revision, pipeline design basis, line-pipe and welding specifications, plus project material, NDT and document requirements. |
| Critical dimensions | Pipe OD, wall thickness, bore fit, weld-end OD/ID and bevel, central thrust-collar OD, width and thickness, overall length and transition geometry. |
| Inspection depth | Dimensional report, UT/MT, weld-end geometry, MTC 3.1, marking and packing. |
| Reviewed before quotation |
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| Buying logic | |
| Best-fit RFQ | Best for pipeline restraint points, thrust anchors and buried or above-ground pipeline support locations. |
| Buyer application | Pipeline systems, oil and gas transmission, compressor stations and special restraint assemblies. |
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 Anchor Flanges drawing or standard before procurement is released.
The forging route is selected around flange type, section thickness, bore allowance, hub or neck geometry and pressure-service requirements.
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 opens reference faces, bore, hub, neck or sealing-face stock needed to control allowance before final flange machining.
Final machining controls facing, bore, bolt pattern, groove, sealing surface and flange-table or drawing tolerances before dimensional inspection is issued.
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 Anchor Flanges shipment can clear customs and be identified at site receiving.
List document requirements in the first RFQ; they affect price and schedule.
Yes. Send the latest drawing revision with material, quantity, tolerance, inspection and destination requirements so the RFQ can be checked before quotation.
A practical RFQ should include standard or drawing, size, pressure rating, material grade, quantity, inspection requirements and destination country.
Common requests include ASTM A105, A350 LF2, stainless steel, duplex steel and project-specified alloy grades, subject to drawing and service requirements.
MTC 3.1, dimensional reports, heat treatment records, PMI, UT, MT, PT and third-party inspection can be reviewed according to the project requirement.
Email quote@bldforgedirect.com with standard, drawing, material, quantity and inspection requirements.