Complete range of pipeline repair and maintenance equipment
Emergency leak repair for straight pipes, socket joints, flanges, tees, elbows, and gas service lines.
Pressurized drilling machines for adding branch lines without shutting down service.
Field pipe cutting equipment for emergency repair, replacement, and planned maintenance.
Branch connection hardware for live tapping, bypasses, and service line additions.
Connect, adapt, compensate, and transition between pipe sections, flanges, and materials.
Pipeline isolation and soft-seal gate valves for repair and maintenance work.
Sizing, extension, sealing, and repair accessories for non-standard field conditions.
01 Our repair clamps enable rapid leak sealing on pressurized pipelines without shutting down the system — minimizing water loss and service disruption. Covers DI, steel, plastic, concrete and galvanized pipes from DN15 to DN2000.
02 Tongfa's flagship QT450-10 ductile-iron Haff clamps — 5.4M+ units shipped between 2019 and 2024, including the Hohhot DN2000 main (1.95 t single-cast clamp, the largest in the industry). Covers DI, steel, plastic, concrete, galvanized and stainless steel pipes from DN15 to DN2000, with EPDM or NBR sealing for water, gas and chemical service.
03 Our connectors, compensators and expansion joints solve the challenge of joining different pipe materials and sizes — with anti-pull-out features, 10° angle compensation, and flange-to-socket adapters from DN50 to DN1200.
04 DK6 and DK8 electric tapping machines branch a live pipeline under full pressure — no shutdown, no service interruption. DK6 handles DN80–DN600 on DI, concrete, PE and steel; DK8 scales up to DN800 for heavy-duty steel and ductile iron mains, paired with saddle clamps to form the permanent branch seal.
Why engineers and procurement teams worldwide choose PipeKnot — factory ownership, international reach
Anhui Tongfa — our manufacturing arm — has been producing pipeline repair equipment since 1994. 119,880 m² facility, 10+ production lines, 180+ patents. You buy factory-direct, not through layers of middlemen.
One quote, one PO, one shipment. Full export service: FOB Shanghai, CIF your port, or door-to-door. We handle freight, customs, and insurance to 30+ countries.
Our team speaks engineering and international trade fluently — in English, Chinese, Spanish, Arabic, French, and Portuguese. Spec matching, sizing guidance, and on-site support.
ISO 9001 & ISO 14001 certified. QT450-10 ductile iron bodies. EPDM/NBR sealing. Third-party pressure-tested. 5.4 million+ clamps shipped between 2019 and 2024.
We don't just sell pipeline repair equipment — we make it. Anhui Tongfa Equipment Co., Ltd. is our manufacturing partner and production base, founded 1994 in Anhui Province, China.
Find the right product for your pipe repair needs
Global Trading Partner · Authorized Distributor of Anhui Tongfa Equipment Co., Ltd.
PipeKnot is an independent global trading company specializing in pipeline repair and maintenance equipment. As the authorized distributor of Anhui Tongfa Equipment Co., Ltd. — a high-technology manufacturer founded in 1994 in Anqing, Anhui, China, operating a 119,880 m² facility with 800+ employees, 10+ production lines, 180+ Chinese patents (including 12+ inventions), and ISO 9001 & 14001 certifications — we deliver engineer-grade QT450-10 ductile iron repair clamps, hot tapping machines, connectors, and valves to water, gas, oil, and chemical industries worldwide. Over 5.4 million repair clamps shipped between 2019 and 2024, including signature projects like the Hohhot DN2000 supply main (2024). Every product uses QT450-10 ductile iron with EPDM/NBR sealing. From product selection and specification matching to global logistics and on-site technical support, PipeKnot delivers complete pipeline repair solutions end-to-end.
Every product you receive comes from a fully vetted manufacturer — we stake our brand on their quality.
Founded 1994 in Anqing, Anhui. 119,880 m² facility, 800+ employees, 10+ production lines — producing 1,000+ specifications of pipeline emergency repair, hot tapping, and cutting equipment. ISO 9001 & ISO 14001 certified.
Have questions about our products? Call, email, or send us an inquiry — we respond within 24 hours.
