From 1” to 32”, from pipes to fittings, from light-duty to heavy-duty, from manual and hydraulic models to fully automatic systems, and from standard solutions to custom designs —
whatever grooving challenge you face, you’ll find the right solution here.
Unique hydraulic system for long-time usae and stable performance
Ideal for fire protection, HVAC, and industrial piping projects
Size combinations:
1"-8", 2"-8" 1"-12", 2"-12" 2"-16" 8"-24", 8"-32"Learn more
Designed for prefabrication workshops and high-output environments
Accurate groove depth control for high-standard applications
Size combinations:
2"-12", 8"-24"Learn more
Designed for prefabrication workshops and high-output environments
PLC control system for consistency and efficiency
Accurate groove depth control for high-standard applications
Size combinations:
2"-12", 8"-24"Learn more
Hand operating, or work with power drives and threading machines
Size combinations:
1"-6", 1"-12",1 1/4"-6",2"-6"Learn more
Equipped with hardened cutting tools for high-strength steel or stainless steel
Delivers high groove accuracy. Ideal for mining, heavy industry, and thick-wall piping systems
Size combinations:
2"-12",8"-32"Learn more
Improves sealing performance and installation efficiency
Size combinations:
2"-12", 2"-24"Learn more
WELPING is our primary brand, focusing on common-size plastic pipe fusion machines, large-diameter butt fusion welding machines, HDPE pipe fittings, and related tools.
Gruvmaster, as a dedicated sub-brand, specializes in providing various pipe grooving machines, pipe cutters, and other pipe processing and fabrication tools for metal piping.
With more than 200 machine structures and tools developed under his direction, Mr. Arron brings both experience and innovation to our engineering team. His work has shaped much of what we build today—and has been recognized by several international brands through successful roll grooving machine development and technical cooperation.
Arron has a strong focus on hydraulic system design, a key component in many of our grooving machines and tools. His systems are known for their reliability, clean layout, and long service life.
Most recently, he led the development of a fully sealed, integrated hydraulic pump—a major breakthrough in grooving machine hydraulics. The new design supports OnePush™ fast feed-in, and TitanSeal™ requires no oil change or maintenance for 2–3 years, and significantly improves overall system stability.
A constant learner, Arron draws insight from field applications, customer conversations, and leading designs in the market. He’s quick to spot the logic behind a good design—and turn it into ractical, forward-thinking solutions.
We will continue to work hard to improve our technical strength and product quality, and provide customers with better groove rolling machines and services. We are looking forward to cooperating with you for common development and a bright future.