A square flange is a non-round forged connection plate: the bolt holes sit on a rectangular pattern instead of a bolt circle, which suits equipment ports, hydraulic blocks and machinery mounting faces where a round flange will not fit the housing.
There is no dimensional table behind this product. Outline length and width, thickness, bore or port profile, bolt-hole coordinates and flatness all come from your drawing. Material is carbon steel, stainless steel or whatever grade the drawing names, against the ASTM or EN standard you cite. Parts run from small machinery plates up to heavy custom plates.
Hole pitch, centre distance, edge distance, port size, counterbore, surface finish and flatness are the dimensions that decide whether the part is machinable and what it costs. Inspection is a dimensional report with a hole-position check plus material traceability and flatness, with MT or PT added when the drawing calls out surface integrity.
Product family: Flanges
Square flange quotation requests are reviewed by drawing, connection pattern, port or bore size, pressure requirement, material, quantity and inspection documents.
| Scope and rating | |
|---|---|
| Drawing-controlled geometry | Overall length, width, thickness, bore or port profile, bolt-hole coordinates and flatness are taken from the drawing. |
| Standards and materials | |
| Standards / drawings |
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| Material grades |
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| Geometry, tolerance and inspection | |
| Typical size review | Small machinery plates through heavy custom plates. |
| Critical dimensions | Hole pitch, center distance, edge distance, port size, counterbore, surface finish and flatness. |
| Inspection depth | Dimensional report, hole-position check, material traceability, flatness and MT/PT if surface integrity is specified. |
| Reviewed before quotation |
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| Buying logic | |
| Best-fit RFQ | Best for square, rectangular or non-round flange plates used in equipment connections and special assemblies. |
| Buyer application | Equipment fabricators, hydraulic systems, machinery bases and custom connection plates. |
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 Square 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 Square Flanges shipment can clear customs and be identified at site receiving.
List document requirements in the first RFQ; they affect price and schedule.
No. There is no dimensional table behind this product: outline length and width, thickness, bore or port profile, bolt-hole coordinates and flatness all come from your drawing.
As coordinates on a rectangular pattern, not a bolt circle. Hole pitch, centre distance, edge distance, port size and counterbore decide whether the part is machinable and what it costs, and hole positions are checked on the dimensional report.
Yes. Parts run from small machinery plates up to heavy custom plates.
When the drawing calls out surface integrity. Otherwise inspection is a dimensional report with a hole-position check, material traceability and flatness.
Email quote@bldforgedirect.com with standard, drawing, material, quantity and inspection requirements.