Bar to Annealed tube
Two induction heaters feed the piercing mills which turns billets to first hollow tube, followed by over 100 meter continuous furnace with N₂ atmosphere for spheroidizing annealing.
In-house process route
Every stage has a name, a purpose and a quality gate.
Full process from Raw Material Inspection to Finish Tube dispatch all in-house.
Raw bar to finished tube
A connected manufacturing flow.
The plant processes mother tubes and final tubes in-house, with mother tubes made from bars. All-electric induction heating, controlled N₂ annealing and in-line NDT keep the route under one roof.
Current capacity: 1,200–1,300 MT per month. Confirm grade- and
size-specific capacity during quotation.
Piercing mill
Process map
What the video shows.
Each stage is listed with a concise explanation.
01
Bar Cutting
A five-head cutting system prepares round bar to the required starting length.
02
All-electric heating & piercing mill
Two induction heaters bring the bar to forming temperature before piercing.
03
Spheroidizing annealing
A over 100 meter long continuous furnace with N₂ atmosphere, conditions the bearing steel to be in a soft-annealed condition.
04
Surface treatment
Prepare the tube surface for stable downstream processing and finished quality.
05
Cold draw & cold-roll pilger
Pilger mills and Draw benches reduce and control the tube geometry to size.
06
Stress relief, straightening & finishing
Stress-relieve, straighten, end-cut and part the tube for handling and application.
07
100% NDT
Rotary ultrasonic testing and automatic Eddy Current Testing inspect every tube, with heat-number traceability.
08
Rust preventive coating, bundling, storage & dispatch
Complete the visible finishing route, identify finished lots and prepare them for dispatch.
The plant floor
Equipment supporting the route.
Purpose-built equipment keeps heating, forming, cold work and inspection connected.
Cold draw & pilger
Twenty-two cold-roll pilger machines, and three draw benches, support controlled final tube geometry.
Online testing
Two ultrasonic machines use 16-probe rotary UT alongside automatic Eddy Current Testing for 100% NDT.
Need a capability match?
Send the tube OD, material, length, annual volume and end-use. The enquiry form is designed around the information engineering teams actually need.