ERW & HF Welded Round Steel Pipe
The round-pipe range for the ZT straight-seam series and the HG coil-fed lines — outside diameter, wall thickness and line speed for each model, with the standards the pipe is specified to.
Download PDF · 1 pageDatasheets & Downloads
One-page specification sheets for welded steel pipe and tube — model ranges, wall thickness, line speed, and the standards each product is specified to. Every sheet is a single page, sized for forwarding to a colleague or attaching to a tender.
Published values, not invented ones
The size and speed figures in these sheets are the ranges published on the corresponding machine page. The standards are cited by designation and scope — grade, mechanical values and tolerances are governed by the standard, not by a measurement of a particular production batch. Where the standard leaves a value to the producer, the sheet says so rather than picking one. Grade, coating and end finish for your order are confirmed at quotation.
Welded pipe lines
Square & Rectangular Hollow Sections
Section range, wall thickness and cut-length tolerance for the two lines we build in square and rectangular format, plus the standards hollow sections are bought to.
Download PDF · 1 pageStainless Steel Welded Tube
The three ZT stainless units — tube OD, wall thickness and line speed — and why stainless lines run at a fraction of carbon-steel speed.
Download PDF · 1 pageHG Series — Model Comparison
HG32, HG50, HG76, HG127 and HG165 side by side: round pipe 10–168 mm, wall 0.4–5.0 mm, line speed, HF welder power, and how the model is chosen by diameter band rather than by size on paper.
Download PDF · 1 pageSpiral Welded Pipe Machine
160–3250 mm diameter and 2–10 mm wall in one machine, how the spiral seam is formed and welded inside and outside, and the elements that make up the line.
Download PDF · 1 pageCoil processing
Steel Coil Slitting Line
SL-1250 and SL-1600 side by side — strip material and thickness, coil size and weight, width tolerance (+/-0.05 mm), line speed and footprint, and what actually decides slit-strip quality.
Download PDF · 1 pageCut-to-Length Lines
The steel 1600 mm class line and the aluminium 2600 mm class line — coil range, cutting length, +/-0.5 mm accuracy, and why the leveller, not the shear, decides the result.
Download PDF · 1 pageSecond forming & tooling
Pipe End Forming — Tapering, Reducing & Closing
The ZSG50NCB cone end former and the three-station tube reducer side by side, the difference between tapering, reducing and closing, and how to tell which one your joint needs.
Download PDF · 1 pagePipe & Tube Bending Machines
Three-roll bender (Φ50×3.0 mm, min radius R250), the 14-station greenhouse tube bender, and the exhaust band clamp line — roller materials, powers and holding accuracy.
Download PDF · 1 pageLine-side equipment
Flying Saw for Welded Pipe Lines
ZF series cold cutting: the +/-2 mm cut-length figure, how tracing and servo feeding keep the cut square while the tube moves, and the saw disc sizes published with each line.
Download PDF · 1 pageTube Mill Auxiliary Equipment
Cantilever and hydraulic decoilers with their coil limits, and the cold-cutting flying saw — cutting method, tracing, and the +/-2 mm cut-length figure the servo tracing holds.
Download PDF · 1 pageReference
Welded Tube — Which Standard Applies
A one-page selector covering ASTM A53, A500, A513, A252, EN 10255, EN 10219, EN 10217, GB/T 3091, GB/T 6728 and API 5L: what each one covers and when buyers choose it.
Download PDF · 1 pageHF Welding — Defect Diagnosis & Operation Essentials
Seven seam faults, their usual causes and what to change; the pre-start checks from the operation guide; and why power, speed and edge alignment decide almost every defect.
Download PDF · 1 pageLaser vs High-Frequency Welded Tube Mill
The laser line specification (round 32–96 mm, square to 75×75, wall 0.8–2.5 mm, 6000 W welder) plus a plain statement of when laser wins over HF welding and when it does not.
Download PDF · 1 pageChoosing guides
Your standard not covered here?
These sheets cover the products we are asked for most. If you are working to a standard or a section that is not listed, send the designation or the drawing and we will confirm the line against it.
Request a quotation ·Browse the machine range ·Technical notes