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.
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.
➤ Designed for small-medium-large diameter steel pipes, size covers from 1" upto 32" in various models
➤ 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"
➤ One-button operation with automatic feeding, positioning, and grooving
➤ Designed for prefabrication workshops and high-output environments
➤ Accurate groove depth control for high-standard applications
➤ Size combinations:
2"-12", 8"-24"
➤ One-button operation with automatic feeding, positioning, and grooving
➤ 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"
➤ Compact and portable, suitable for fieldwork or tight spaces
➤ Hand operating, or work with power drives and threading machines
➤ Size combinations:
1"-6", 1"-12",1 1/4"-6",2"-6"
➤ Cutting-based grooving avoids pipe deformation and material stress
➤ 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"
➤ Restores roundness after grooving to ensure tight connections
➤ Improves sealing performance and installation efficiency
➤ Size combinations:
2"-12", 2"-24"
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.