Pipe Repair Clamps
Flange Repair Clamp
Professional flanged repair clamp for pipe repair and replacement.
Inquire NowSpecifications
How to read the model number： GH100 = repair of the flanged joint on a DN100 ductile iron or steel pipe.
| Model | DN | NPS | OD (mm) OD (in) | Clamp D (mm) Clamp D (in) | Length (mm) Length (in) |
|---|---|---|---|---|---|
| GH80 | DN80 | 3" | 88.5 mm 3.48" | 240 mm 9.45" | 250 mm 9.8" |
| GH65 | DN65 | 2½" | 75.5 mm 2.97" | 220 mm 8.66" | 230 mm 9.1" |
| GH50 | DN50 | 2" | 60 mm 2.36" | 200 mm 7.87" | 220 mm 8.7" |
| GH100 | DN100 | 4" | 118 mm 4.65" | 260 mm 10.24" | 280 mm 11.0" |
| GH150 | DN150 | 6" | 170 mm 6.69" | 325 mm 12.80" | 295 mm 11.6" |
| GH200 | DN200 | 8" | 222 mm 8.74" | 380 mm 14.96" | 300 mm 11.8" |
| GH300 | DN300 | 12" | 326 mm 12.83" | 505 mm 19.88" | 350 mm 13.8" |
| GH400 | DN400 | 16" | 429 mm 16.89" | 600 mm 23.62" | 360 mm 14.2" |
| GH500 | DN500 | 20" | 532 mm 20.94" | 730 mm 28.74" | 370 mm 14.6" |
Frequently Asked Questions
What pipe types and sizes is the Flange Repair Clamp compatible with?
The Flange Repair Clamp fits DN50 to DN500 pipelines and is engineered for ductile iron and carbon and galvanized steel. It seals longitudinal cracks, pinholes, circumferential fractures, and joint leaks without cutting out the damaged pipe section.
What is the working pressure rating?
Rated for 1.0 MPa. Standard clamp bodies are tested to at least PN16 (1.6 MPa); higher-pressure variants are available on request for gas-distribution and industrial service.
Can this clamp be installed on a live, pressurized pipeline?
Yes. The Flange Repair Clamp is designed for installation on live pipelines under pressure, which means municipal water, gas, or process flow does not have to be interrupted. Our technical team provides pre-install checklists to ensure safe deployment.
What materials are used in the body and sealing gasket?
Construction — shell: Ductile iron QT450-10 · seal: EPDM. Corrosion-resistant stainless-steel banding (SUS304 / SUS316) with EPDM (potable water) or NBR (oil / hydrocarbon service) gaskets is available depending on the application.
What is the lead time and how is it shipped?
Standard lead time is 15 working days ex-factory, shipping FOB Shanghai. Sea, air, and combined transport are arranged through PipeKnot to over 40 countries. Volume orders and project tenders receive priority scheduling.
Is installation guidance and technical support included?
PipeKnot provides English-language installation drawings, torque specifications, and remote technical support. On-site commissioning support can be arranged for qualifying projects in partnership with Anhui Tongfa field engineers.
