Facing reference
Male and Female Flanges
A projecting male face mates with a recessed female face. Specify the full seating geometry and gasket requirements rather than substituting tongue-and-groove terminology.
Projecting and recessed faces
The male projection and female recess form a matched pair with defined seating diameters and depths. The facing name alone does not resolve the dimensions or identify the governing standard. Record the exact designation or approved equipment drawing.
Joint clearance and gasket
The gasket and mating clearances must be compatible with the intended compression and bolt loading. Confirm which dimensions apply to the gasket seat and which establish location or clearance. A visual match of two recesses is not a dimensional acceptance check.
Replacement control
Identify whether the enquiry is for the male half, female half or both components. Include the mating-flange details and any known modifications. Do not pair parts from different standards on the basis of the same nominal size without a complete interface review.
Selection reference only. Offered scope, technical compliance and availability are confirmed against the complete project enquiry.
Mating face and gasket requirements
For Male and Female Flanges, face geometry, gasket selection and assembly loading must be reviewed together. Confirm the complete mating pair before ordering.
| Parameter / designation | Technical information | Selection requirement |
|---|---|---|
| Male face | Define the projecting seating area and its diameter. | Identify the projecting side on the assembly drawing. |
| Female face | Define the mating recess and seating depth. | Check projection/recess fit against the specified gasket. |
| Gasket confinement | Specify material and dimensions for the actual recess. | Male/female and tongue/groove terminology do not describe interchangeable geometry. |
| Assembly fit | Review concentricity, clearance and surface condition. | Use the approved bolting and gasket-compression procedure. |
Compare related options
Compare Male and Female Flanges with the related forms or references below. A related product is not necessarily a permissible substitute.
| Related product / reference | Distinction | Check before selection |
|---|---|---|
| Raised Face (RF) Flanges | A raised face provides a gasket seating surface inside the bolt circle. Specify the face dimensions, finish and gasket as a coordinated joint requirement. | RF dimensions under the exact flange standard and designation |
| Flat Face (FF) Flanges | A flat face has no raised gasket seating step. Confirm the gasket coverage, mating flange material and joint loading rather than identifying it only by appearance. | Type, construction, material and applicable standard |
| Ring Type Joint (RTJ) Flanges | An RTJ face uses a machined groove and a matching metal ring gasket. Ring and groove designations must be specified as a system, not chosen by nominal pipe size alone. | Flange standard, connection designation and groove details |
| Tongue and Groove Flanges | A tongue-and-groove joint pairs a projecting tongue with a matching groove. The two faces and the confined gasket dimensions must be specified together. | Tongue side, groove side or complete mating set |
| Lap Joint Assembly | In a lap-joint assembly, the stub end provides the gasket seating surface. The separate backing flange transfers bolt load and can rotate for alignment before tightening. | Backing flange and stub-end designations separately |
Inspection, documents and delivery
Define acceptance requirements for Male and Female Flanges in the purchase order. Required examinations and documents depend on the material, design and project specification.
| Review stage | Information to confirm | Order requirement |
|---|---|---|
| Material identity and traceability | Specification, grade, heat/lot identification and the required material certificate. | Agree documentation and marking before manufacture; visual appearance cannot verify alloy identity. |
| Dimensional verification | Seating diameter, face profile, recess/projection and mating clearances. | Identify inspection points, tolerances, units and drawing revision. |
| Surface and end condition | Gasket-contact surface, attachment end, edges and any coating exclusions. | State finish and visual acceptance criteria; agree protection of machined surfaces. |
| Supplementary examinations | Any specified PMI, NDE, hardness, impact, corrosion or other tests. | Define the method, sampling and acceptance criteria; tests are not automatically included. |
| Assembly compatibility | Gasket dimensions/material, mating flange and bolting procedure. | Design approval and correct assembly remain separate from a dimensional inspection report. |
| Packing and order release | Quantity, identification, surface protection, documents and delivery destination. | Agree preservation, packaging and release requirements with the order. |
Enquiry checklist
Details for Male and Female
Specify the complete joint and design conditions. This checklist is not a dimensional table or an engineering approval.
| Item | Requirement |
|---|---|
| Mating side | Male, female or matched pair |
| Facing | Projection/recess diameters, depth and clearance |
| Gasket | Seating dimensions, material and required compression |
| Records | Governing standard and mating-flange drawing |
Continue the specification