China Top Manufacturer,Custom heat treatment line covers quenching, tempering, normalizing and annealing for seamless casing, tubing and drill pipes, meeting API 5CT grades J55, K55, N80, L80, P110, Q125. Roller-hearth or induction heating delivers precise uniform heating; spray quenching & air cooling stabilizes mechanical properties. Fully automatic workflow ensures low energy consumption, high efficiency and consistent quality for mass OCTG manufacturing.
China Top Manufacturer,Custom hydraulic expander serves as core forming equipment for OCTG lines, expanding and calibrating seamless casing, tubing and drill pipes to eliminate ovality, wall thickness unevenness and dimensional errors. Featuring precise hydraulic drive and modular dies for even radial expansion, it fits carbon, alloy and high-strength steel, ensures stable dimension consistency, and aligns with downstream processes to satisfy API Spec 5CT requirements.
China Top Manufacturer,Custom Solid-state HF Induction Welder adopts AC-DC-AC variable frequency structure with thyristor rectification and LC filtering. Modular parallel MOSFET inverters connect resonant circuits via isolation transformers for power convergence and impedance matching, equipped with fast overcurrent protection to ensure stable, safe welding operation.
China Top Manufacturer,Custom Forming,Sizing and Turk Head Straightening. It supports W, FF/FFX flexible and DFT direct forming; quick roll change system slashes downtime, ensures precise dimension, cuts roller & labor cost and lifts output for round & square pipe production.
China Top Manufacturer,Custom Orbital Milling Cutoff upgrades traditional flying shears and cold saws for ERW, seamless pipe lines. It enables synchronous continuous cold cutting without line downtime, producing burr-free, deformation-free & HAZ-free ends for carbon, alloy, stainless steel pipes, OCTG casing and tubing.
China Top Manufacturer,Custom Solid-state High-frequency Induction Welder,which employs proven AC-DC-AC circuit topology equipped with three-phase thyristor rectifier and DC bus LC filter. Modular parallel MOSFET inverters work with matched transformers to complete power combination, impedance matching and electrical isolation, plus rapid overcurrent protection to guarantee stable and reliable equipment operation.
China Top Manufacturer,Custom forming, HF welding, cooling and sizing sections with Turks Heads for precision calibration. It offers three forming modes: W Forming for high accuracy and long service life; FF/FFX slashing roller cost and change time; DFT supporting roll-free size switching with one-click recipe adjustment. The quick change system realizes offline roller setup to sharply reduce production downtime.
China Top Manufacturer,Custom horizontal & spiral strip accumulators install between shear-end welder and forming mill on ERW pipe lines. They reserve steel strip to feed downstream mill continuously during coil change, strip cutting & butt welding, preventing line stops. This vital auxiliary ensures non-stop ERW tube production, reduces downtime, and improves line efficiency, product yield and overall productivity.
China Top Manufacturer,Custom Shear End Welder is critical front-end auxiliary equipment for ERW & OCTG welded pipe lines. It trims uneven steel strip coil edges, performs auto alignment and butt welding to splice strips. Connected strip feeds into accumulator, stopping production halts during coil change for stable continuous pipe manufacturing.
China Top Manufacturer,Custom flattener machine is a necessary auxiliary device for ERW pipe lines. It levels hot & cold rolled steel strips to fix camber, edge curl and warpage. Precise rolling ensures uniform flatness before forming, prevents strip shifting, reduces welding defects like seam offset and incomplete penetration, and stabilizes finished pipe dimensional precision.
China Top Manufacturer,Custom ERW tube mill entry uncoiler,which features coil trolley automatic feeding and expandable mandrel unwinding structure to convey steel strips precisely into the flattener. Constant stable strip tension effectively prevents material blockages, delivers perfectly leveled blanks for subsequent forming, high-frequency welding and sizing processes, and guarantees reliable large-batch production of standard OCTG casing and tubing.
China Top Manufacturer,Custom Uncoiler works as core inlet equipment for ERW welded pipe production lines, unwinding steel coils with the support of coil loading trolleys. The expandable mandrel prevents coil distortion, while matched driving and braking systems ensure stable strip feeding to the leveler, keeping constant tension and eliminating material jams to support precise forming, HF welding and sizing for OCTG casing, tubing and structural pipes.