Find the right answer, faster.
Search WELPING technical resources or browse practical product guides, maintenance advice and troubleshooting articles. Every result opens the original Blog article.

Knowledge library
Popular questions
Latest knowledge articles
How to Quickly Replace a Hydraulic Quick Coupler
The hydraulic quick coupler is an important connection component in the hydraulic system of a butt fusion welding machine. If the coupler becomes worn, damaged, or needs to be replaced during routine maintenance, the replacement process is
Read original articlePE pipe execution standards — did you choose the right one?
PE Pipe - Commonly Used Chinese Execution Standards (Current)
Read original articleHow to Use the PE Butt Fusion Welding Machine?
A PE butt fusion welding machine is used to butt-join pipes directly; it is not for dragging pipes. For example, I welded 50 meters at Location 1 and 50 meters at Location 2. I want to connect the pipes from the two locations together. How
Read original articleOn-site Shot of Welding Defects in PE Electrofusion Fittings: Can Such Products Still Be Used?
Do not use electrofusion fittings in case of jetting, short circuit, or other similar abnormal conditions.
Read original articleHow to Connect PE Pipes to Iron Pipes and PPR Pipes
PE pipes cannot be directly heat-fused to PPR or iron pipes. Depending on pipe size and service conditions, use brass-insert transition fittings, threaded adapters, flange connections, push-in connectors, steel-plastic transitions, or clamp
Read original articleHow to Install PE Reducing Couplings in Series
Connecting PE reducing couplings in series increases cumulative risk at the joints. If series connection cannot be avoided, use compliant fittings, follow PE butt fusion or electrofusion procedures, and pressure-test the entire piping syste
Read original articleWhat Type of Fusion Welder Is Suitable for PPR Pipes?
Common hand-held fusion welders for PPR pipes include DN20-32, DN20-63 and DN75-110 models. For PPR pipes larger than DN160, butt fusion or electrofusion welding may be used.
Read original articleHDPE Butt Fusion Welding Temperature Chart & Key Parameters
A practical guide to HDPE butt fusion temperature, pressure, heating and cooling parameters. Learn why heater temperature alone is not enough, how interfacial pressure differs from hydraulic gauge pressure, and why DVS 2207-1, ISO 21307 and
Read original articleWhat Should a Large-Diameter PE Pipe Fusion Machine Be Designed to Handle? A Closer Look at the WP800A
This article examines the key design requirements of a large-diameter PE pipe butt fusion machine, using the WP800A as a practical example. It covers frame rigidity, carriage guidance, clamping inserts, facing performance, heater temperatur
Read original articleHow to Choose the Right HDPE Butt Fusion Machine: Understanding A Pro, A Max and FX Series
Compare Welping A Pro, A Max, and FX butt fusion machine series to understand the differences in structure, hydraulic systems, and applications, and choose the right HDPE welding solution.
Read original articleRG-2T Outward Groove Forming Process: How a Convex Groove Is Formed on Metal Pipe
RG-2T is designed for inward and outward groove forming on metal pipes. This article explains how a convex groove is formed by controlled rolling pressure during the outward groove forming process.
Read original articleHow to Choose a 1200mm Butt Fusion Welding Machine for Large HDPE Pipes
This article explains how to choose a 1200mm butt fusion welding machine for large PE and HDPE pipe projects. It covers key factors such as working range, frame stability, pipe clamping, facer performance, heating plate uniformity, hydrauli
Read original articleExplore more guidance
Troubleshooting & FAQTroubleshooting & FAQ12 shown · 12 indexed
On-site Shot of Welding Defects in PE Electrofusion Fittings: Can Such Products Still Be Used?
Do not use electrofusion fittings in case of jetting, short circuit, or other similar abnormal conditions.
Read original articleWhat Type of Fusion Welder Is Suitable for PPR Pipes?
Common hand-held fusion welders for PPR pipes include DN20-32, DN20-63 and DN75-110 models. For PPR pipes larger than DN160, butt fusion or electrofusion welding may be used.
Read original articleHow to Choose the Right HDPE Butt Fusion Machine: Understanding A Pro, A Max and FX Series
Compare Welping A Pro, A Max, and FX butt fusion machine series to understand the differences in structure, hydraulic systems, and applications, and choose the right HDPE welding solution.
Read original articleHow the RG-2X Ensures Stable Grooving for Medium to Large Diameter Steel Pipes
The RG-2X roll grooving machine is designed for 2"–12" steel pipes, focusing on stable operation and practical usability. With support for SCH40 pipes up to 10 mm thickness and a fully sealed hydraulic system, it is suitable for fire protec
Read original articlePipe Straps vs Pipe Hangers: What’s the Difference and When to Use Each
Pipe straps and pipe hangers serve different roles in piping systems. Pipe straps are designed for direct surface fixing in light-duty applications, while pipe hangers provide stronger, adjustable support for suspended and heavier piping sy
Read original articleWhich welding machine is suitable?
Which welding machine is suitable?
Read original articleOverview of Pipe Support Solutions: Straps, Hangers, and Riser Clamps
This article provides a practical overview of common pipe support solutions, including pipe straps, hangers, and riser clamps. It explains their typical structures, applications, and key differences. By understanding how each type is used i
Read original articleWhat should I do if the hydraulic butt welding machine fails to hold pressure?
What should I do if the hydraulic butt welding machine fails to hold pressure?
Read original articleWhat are the consequences of incorrect phase sequence connection for 380V three-phase power supply?
What are the consequences of incorrect phase sequence connection for 380V three-phase power supply?
Read original articleFacer run automatically
With the 380V hydraulic power unit, the milling cutter begins to move when the forward/reverse valve is actuated.
Read original articleCause and Solution for Air in the Hydraulic Hose
Jerky movement of a butt fusion machine may be caused by air trapped in the hydraulic hose. This guide explains the cause and shows how to remove air from the hydraulic system step by step.
Read original articleWhy the Frame Rings of FX800 and Larger Butt Fusion Machines Are Finished in Black
FX800 and larger butt fusion machines use black-finished frame rings instead of standard blue due to material and manufacturing considerations. After high-temperature forging, the frame rings exhibit surface imperfections that would be more
Read original articleMaintenanceMaintenance7 shown · 7 indexed
How to Quickly Replace a Hydraulic Quick Coupler
The hydraulic quick coupler is an important connection component in the hydraulic system of a butt fusion welding machine. If the coupler becomes worn, damaged, or needs to be replaced during routine maintenance, the replacement process is
Read original articleHow to Connect PE Pipes to Iron Pipes and PPR Pipes
PE pipes cannot be directly heat-fused to PPR or iron pipes. Depending on pipe size and service conditions, use brass-insert transition fittings, threaded adapters, flange connections, push-in connectors, steel-plastic transitions, or clamp
Read original articleWhat Should a Large-Diameter PE Pipe Fusion Machine Be Designed to Handle? A Closer Look at the WP800A
This article examines the key design requirements of a large-diameter PE pipe butt fusion machine, using the WP800A as a practical example. It covers frame rigidity, carriage guidance, clamping inserts, facing performance, heater temperatur
Read original articleA PRO Hydraulic Unit – Pressure Adjustment Guide
Step-by-step guide to hydraulic pressure adjustment on A PRO butt fusion machine, ensuring stable operation and correct setup before welding.
Read original articleWelping Machine Maintenance and Care Manual
Welping Machine Maintenance and Care Manual
Read original articleRecent Shipment Update – Gruvmaster Roll Grooving Machines
A new batch of Gruvmaster roll grooving machines has completed assembly and shipment preparation. From final assembly to wooden crate packing, each machine is inspected and secured before delivery. These photos document the real manufacturi
Read original articleA Practical Test and Usage Record of a Pipe Cutting Blade
This article documents a practical evaluation of a pipe cutting blade used on Gruvmaster pipe cutting machines. Based on repeated cutting tests under real steel and galvanized pipe conditions, the focus is on blade wear behavior, performanc
Read original articleHow-to GuidesHow-to Guides9 shown · 9 indexed
How to Use the PE Butt Fusion Welding Machine?
A PE butt fusion welding machine is used to butt-join pipes directly; it is not for dragging pipes. For example, I welded 50 meters at Location 1 and 50 meters at Location 2. I want to connect the pipes from the two locations together. How
Read original articleHow to Install PE Reducing Couplings in Series
Connecting PE reducing couplings in series increases cumulative risk at the joints. If series connection cannot be avoided, use compliant fittings, follow PE butt fusion or electrofusion procedures, and pressure-test the entire piping syste
Read original articleHDPE Butt Fusion Welding Temperature Chart & Key Parameters
A practical guide to HDPE butt fusion temperature, pressure, heating and cooling parameters. Learn why heater temperature alone is not enough, how interfacial pressure differs from hydraulic gauge pressure, and why DVS 2207-1, ISO 21307 and
Read original articleRG-2T Outward Groove Forming Process: How a Convex Groove Is Formed on Metal Pipe
RG-2T is designed for inward and outward groove forming on metal pipes. This article explains how a convex groove is formed by controlled rolling pressure during the outward groove forming process.
Read original articleOGS vs AGS: Understanding Their Roles in Pipe Grooving
OGS and AGS are two key grooving standards used in pipe connections. While OGS is widely applied in standard pipe sizes, AGS is designed for large-diameter applications where higher joint stability is required. This article explains their d
Read original articleFX Series Remote Control: Built for Real Jobsite Use
This article introduces the standard remote control used on FX series butt fusion machines. Designed for real jobsite conditions, the remote control features a clear four-button layout, emergency stop function, trimmer control, and magnetic
Read original articleFX Series Remote Control: Built for Real Jobsite Use
This article introduces the standard remote control used on FX series butt fusion machines. Designed for real jobsite conditions, the remote control features a clear four-button layout, emergency stop function, trimmer control, and magnetic
Read original articleWhy a Stand with a Scale Improves Batch Grooving Efficiency
A pipe stand with an integrated scale improves batch grooving efficiency by turning manual positioning into reference-based setup. Operators can quickly repeat the same settings for identical pipe sizes, reducing adjustment time and workflo
Read original articleApplications of HDPE Butt Fusion Machines in Pipeline Engineering
This article explains the role of HDPE butt fusion machines in pipeline engineering. It outlines the basic fusion principle, the function of butt fusion machines as process control equipment, and why butt fusion is widely used in medium- an
Read original articleProduct KnowledgeProduct Knowledge9 shown · 9 indexed
PE pipe execution standards — did you choose the right one?
PE Pipe - Commonly Used Chinese Execution Standards (Current)
Read original articleHow to Choose a 1200mm Butt Fusion Welding Machine for Large HDPE Pipes
This article explains how to choose a 1200mm butt fusion welding machine for large PE and HDPE pipe projects. It covers key factors such as working range, frame stability, pipe clamping, facer performance, heating plate uniformity, hydrauli
Read original articleWelping Custom 2000mm Butt Fusion Machine for Large-Diameter Applications
A custom 2000mm butt fusion machine was developed by Welping for large-diameter pipeline applications. The design focuses on structural stability, consistent pressure control, and uniform heating performance under demanding conditions. Rath
Read original articleBoth Electric Hydraulic Pipe Cutters: Choosing Between CM-12 and CM-20
CM-12 and CM-20 are two electric hydraulic pipe cutters designed for different pipe sizes and working environments. While both machines use the same cold-cutting principle and hydraulic feeding system, CM-12 focuses on efficient cutting of
Read original articleFX Series Butt Fusion Machine Clamp Configuration
This article explains how clamp configurations vary across FX series butt fusion machines based on pipe size. Models up to 315 typically use two to three clamp blocks, while machines sized 355 and above adopt a multi-segment full-circle cla
Read original articleHow We Understand Roll Grooving Machines Internally
This article records an internal technical discussion on roll grooving machines at Gruvmaster. Through open discussion and 3D model review, the team explored machine structures, design logic, and component relationships. The session focused
Read original articleFX Series Butt Fusion Machines: Practical Standard Accessories
This article explains the standard accessory configuration of FX series butt fusion machines. Beyond core components, the FX series includes practical accessories such as modular clamp inserts, accumulators, support shoes, and wear-resistan
Read original articleWhat Makes Up a Complete Butt Fusion Welding Machine?|FX630 as an Example
A complete butt fusion welding machine includes a main frame, facer, heater, and hydraulic power unit. Using the FX630 as an example, this article explains how each component works together during HDPE pipe welding, and why a lifting crane
Read original articleUnderstanding the Frame Design of FX250 and FX315 in the FUSINGX FX Series
The FX250 and FX315 use a unique round-edge steel tube frame, while larger FX models adopt thickened steel plates. This article explains the structural differences and why each design fits its pipe size range, supported by real production p
Read original articleCannot find the answer?
Try a broader term in the search box, browse all Blog articles, or contact WELPING technical support.


















