FYID-Feiyide
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The clamshell body opens around pipe anywhere in the run, locks closed, and cold-cuts or bevels in place — without pipe-end access. Built for refinery, chemical, boiler, and field repair work where the standard end-entry cutter cannot reach. V / U / Y / compound bevel. Electric, pneumatic, or hydraulic drive.
The split-frame pipe cutting and beveling machine (also called a clamshell cutter) is designed for one problem: the pipe end is not accessible. Valves, supports, equipment nozzles, and structural steelwork routinely block end-entry cutting tools — an orbital pipe cutter or a tube saw cannot clamp over the pipe end when there is no clear path from the open end. The split-frame machine opens laterally, wraps around the pipe at any point along its length, closes and locks onto the pipe OD, and machines the pipe in place.
The machine uses cold cutting throughout: a rotating tool slide carries the cutting/ beveling insert around the pipe circumference while the pipe stays stationary. Cold cutting avoids the heat-affected zones, thermal distortion, and hardening that flame cutting creates, particularly on alloy steel, stainless, and chrome-moly pipe where thermal treatment can invalidate the weld procedure qualification.
Bevel form is determined by tool selection and slide configuration against the welding procedure specification (WPS). V, U, Y, compound V, compound U, flange facing, and internal boring are all achievable by selecting the correct insert and slide combination before clamping on the pipe. The split-frame machine is the upstream step before FXT40 Pro + K-series or G168 track-type orbital welding on heavy-wall industrial pipe.
Drive type is selected by application conditions. Electric motors are standard for controlled industrial environments. Pneumatic drives suit hazardous areas classified under ATEX / IECEx where a hot-work permit or motor-spark ignition is a concern. Hydraulic drives handle continuous heavy-duty load on thick-wall large-diameter pipe. Servo drives offer programmable feed rates and are used where bevel angle consistency must be documented for code-qualified WPS development. Drive selection should follow site EHS rules and the project hazardous-area classification.
Opens around the pipe at any accessible point along the run. No pipe-end access required. Correct tool for installed manifolds, skid piping, valve replacements, in-service line repairs, and tie-ins where the line is cut and prepped in position.
Machining, not thermal cutting. No heat-affected zone, no oxidation at the cut face, no hardening of alloy steel at the bevel surface. Produces a bevel face that meets WPS root face and angle tolerances without additional grinding.
V, U, Y, compound V, compound U, flange facing, and internal boring are configured by tool insert and slide selection. One machine covers the full bevel library for a project WPS — no tool change between pipe sizes, just insert change.
Model range from YPD-89 through YPD-426 and above covers ¾″ to 48″ (19mm to 1220mm) pipe OD. Confirm exact OD and schedule against the selected model before ordering — wall thickness affects slide selection.
Pneumatic and hydraulic drives for ATEX / IECEx classified work areas where electric motors require additional permitting. Drive selection follows site EHS classification and hot-work permit rules.
Bevel angle and root face produced by machine cutting are geometrically consistent across joints — a prerequisite for procedure qualification under ASME Section IX, API 1104, and EN ISO 15614. Servo drive option supports documented feed rates for WPS traceability.
Heavy-wall pipe welding (> 2.5mm wall) requires a prepared bevel groove before orbital TIG welding. Without proper bevel preparation, the electric arc cannot reach the root of the joint, the weld pool cannot fill the depth, and root-pass defects — lack of fusion, incomplete penetration — result. The bevel geometry must match the WPS: V-groove for standard process pipe (35–37.5° per side, carbon steel), larger angle for stainless steel where pool viscosity is higher, U-groove for heavy-wall where a V-groove would require excessive filler volume.
The standard preparation workflow for heavy-wall orbital TIG welding is:
End-entry cutters (including the CM series planetary cutter) require unobstructed access to the pipe end to clamp on. In installed piping, the pipe end is almost always blocked by a valve, support, flange, or equipment nozzle. The split-frame machine opens around the pipe at any accessible point, without requiring end access. It is the correct tool for most field repair, tie-in, and in-service line work.
Electric motors are standard and cover most controlled industrial environments. Choose pneumatic or hydraulic drives for ATEX / IECEx Zone 1 or Zone 2 classified areas where electric motors require additional hot-work permitting. Servo drives are used where feed rate documentation is required for WPS traceability in procedure qualification. Confirm your site’s hazardous-area classification with your HSE department before specifying the drive.
Bevel angle is configured by insert selection. Standard process pipe welding uses a single V-bevel at 30–37.5° per side (total included angle 60–75°) for carbon steel and 37.5–45° per side for stainless steel. U-groove and compound bevel configurations are set up by the tool slide and insert combination. Provide your WPS bevel specification when ordering and we will confirm the correct insert package.
Yes. Cold machining is preferable to flame cutting on chrome-moly alloy steel because thermal cutting creates a hardened heat-affected zone at the bevel face that must be removed by grinding before welding. The split-frame cold-cuts to finished bevel geometry without thermal effects on the base metal.
Specify pipe OD, wall thickness (or pipe schedule), material, required bevel form, and site drive type (electric / pneumatic / hydraulic). We will confirm the correct YPD model, slide configuration, and insert selection. For non-standard ODs or heavy-wall pipe outside standard slide range, provide the full pipe specification and we will quote the custom configuration.
A split frame pipe cutting and beveling machine (also known as a clamshell pipe cutter) is a portable, ring-style machine designed for on-site pipeline processing. Its unique split-type structure allows it to open and install around any part of a pipeline, making it ideal for pipes where the ends are inaccessible. It can perform cutting and beveling simultaneously or separately on various materials like carbon steel, stainless steel, and alloy steel.
The primary advantages include its on-site installation capability, cold cutting process (no heat-affected zone), and compact radial clearance. It eliminates the need to disassemble pipelines and is perfect for confined spaces like pipe galleries. By completing cutting and beveling in one operation, it significantly reduces downtime and improves efficiency in emergency repairs.
Our split frame machines cover a wide processing range from 3/4" to 48" (Φ20mm to Φ1230mm). Depending on the model, we offer standard cutter holders for wall thicknesses up to 30mm and heavy-duty holders for ultra-thick pipes up to 110mm. We also provide non-standard custom designs for larger diameter pipelines upon request.
We offer four versatile drive methods to suit different working environments: Electric: Convenient for standard power supply (220V). Pneumatic: Explosion-proof and safe for oil and gas environments. Hydraulic: Provides strong power and low noise for heavy-duty continuous operations. Servo: High-load bearing with high precision and low noise.
Yes. Our machine utilizes a cold cutting process that generates no sparks, no open flames, and no heat-affected zones (HAZ). When combined with a pneumatic drive, it is highly suitable for high-risk, flammable, and explosive environments such as oil refineries, gas pipelines, and chemical plants.
The FYID split frame machine is highly versatile, capable of processing V-type, U-type, Y-type, and compound bevels. It can also handle chamfering, edge cutting, and even raised face flange processing after welding. Standard tool angles include 0°, 30°, 37.5°, and 45°.
The machine is designed with a small radial clearance (low-profile design). For example, the 6" model requires only a small radial space to rotate, making it ideal for tight equipment rooms or underground pipe galleries where traditional large-scale machinery cannot fit.
We offer a specialized Roundness Compensation Cutter Holder. This accessory is designed to track the surface of deformed or elliptical pipes, ensuring a uniform bevel even on imperfectly round pipelines with a wall thickness up to 110mm.
Standard models are typically shipped within 5-10 working days. For non-standard custom products tailored to specific technical requirements, the delivery period is usually 15-20 working days. We offer both international air (10-15 days) and sea freight (30-45 days) options.
We provide a 12-month whole-machine warranty and lifetime technical support. Our team offers 7×18 hours online video support in English and Chinese. For major domestic cities, we offer on-site service within 72 hours, and for overseas customers, we provide remote diagnosis, video guidance, and rapid spare parts shipping (within 48 hours).
