Standard reference
AWWA C207 Flanges
AWWA C207 flange enquiries concern steel pipe flanges for waterworks service within the standard scope. Its class designations should not be treated as ASME classes.
Waterworks connection requirements
Identify the flange form, nominal size, class and material under the required edition. Provide the pipe outside diameter and the actual connection arrangement. Waterworks flange selection must consider the piping and equipment interface, not just a familiar drilling pattern.
Pressure and design conditions
Confirm the applicable pressure limits and project conditions using the required standard and engineering specification. Temperature, surge and other design considerations should be addressed by the responsible designer. AWWA and ASME class designations are not equivalent labels.
Fabrication and coating
State weld details, facing and gasket requirements together with dimensional inspection. Water-contact coatings or linings may have project-specific requirements. Define the treatment of seating surfaces, bolt holes and other areas where coating could affect the joint.
Selection reference only. Offered scope, technical compliance and availability are confirmed against the complete project enquiry.
Standard scope and ordering designation
Use AWWA C207 only within its applicable scope. Obtain numerical dimensions and rating tables from the governing standard and the approved project documentation.
| Parameter / designation | Technical information | Selection requirement |
|---|---|---|
| Standard and edition | AWWA C207 | Record the exact edition and applicable type/series in the purchase description. |
| Scope | AWWA C207 flange enquiries concern steel pipe flanges for waterworks service within the standard scope. Its class designations should not be treated as ASME classes. | Check size, material and component scope before applying any table. |
| Dimensional designation | Nominal size, series/type, rating designation and dimensional units. | Matching nominal size does not prove matching bolt circle, thickness or facing. |
| Material-dependent rating | Material group, design temperature and any standard-specific rating rules. | Do not read a class number as a direct pressure limit or transfer ratings between materials. |
| Related requirements | Gaskets, fasteners, attachment welds and the project piping/equipment code. | The flange standard does not replace complete assembly design or installation requirements. |
| Legacy or alternate designations | Existing drawing number, original standard and proposed replacement designation. | Verify dimensions and suitability rather than assuming historical names are equivalent. |
Compare related options
Compare AWWA C207 Flanges with the related forms or references below. A related product is not necessarily a permissible substitute.
| Related product / reference | Distinction | Check before selection |
|---|---|---|
| Carbon Steel Flanges | Define carbon steel flanges by product specification, temperature range and joint design. Carbon steel is a material family, not a pressure rating. | Forging or plate specification, grade and heat treatment |
| 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 |
| Flange Pressure Ratings | A flange class, PN designation or table is not a universal allowable pressure. The design must use the specified standard, material and temperature together. | Exact edition and flange/rating designation |
Inspection, documents and delivery
Define acceptance requirements for AWWA C207 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 | Critical dimensions from the selected standard or controlled drawing. | 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 | Adjoining components, weld or mechanical interface and project service conditions. | 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 AWWA C207
Specify the complete joint and design conditions. This checklist is not a dimensional table or an engineering approval.
| Item | Requirement |
|---|---|
| Reference | AWWA C207 edition, flange form, size and class |
| Pipe | Outside diameter and connection or weld details |
| Service | Waterworks design conditions and project supplements |
| Finish | Gasket seating, coating/lining and inspection requirements |
Continue the specification