Guides · 11 articles
Working notes from the YH engineering team on choosing a line, reading model tables, selecting a weld route, diagnosing forming defects and ordering tooling. Every figure comes from the published machine and mould tables; where a value is not published, the guide says so.
01 articles
Preview11 min read
A tube mill is a line that forms steel strip into welded tube in one continuous run. The definition, the names buyers use, the five-station working principle, the process diagram and the design choices that separate the six YH line families.
02 articles
Preview11 min read
A repeatable way to pick one line from the six YH machine tables — fix your range, read the tables as one diameter × wall map, and break model-name overlaps by material and downstream process.
Preview12 min read
The YH number is the H-shaft size, not the machine. Here is how the same model name splits across four line families — with the verified row for each — and how to write an RFQ so two quotes describe one machine.
02 articles
Preview10 min read
A Φ5 mm line and a Φ630 mm line are different machines, not one machine with a bigger number. What changes in shafts, motors, footprint and post-weld stations — and where the two ends meet.
Preview11 min read
The weld route sets the seam profile, the material you can run and how much post-weld finishing the product needs. A five-check decision list for laser, TIG/plasma and HF — with speed figures only where the brochure publishes them.
01 articles
Preview10 min read
Most tube defects come from a specific place in the line. Map the five forming stations to the defects they control, then see which of the six YH production flows adds the post-weld station your product needs.
02 articles
Preview10 min read
Bore, surface and keyway decide whether a mould runs clean. Work backwards from the finished pipe: family first, then steel grade, hardness and tolerance class — and only then price.
Preview9 min read
Tooling orders fail in the information you send or the checks you skip on arrival. The five inputs every quote needs, the inspection record to ask for, and how to make a re-order accurate.
03 articles
Preview9 min read
The line is run in on your pipe size before it ships. Turn that step into a purchase-order checklist: anchor the test to the model row, list the instruments to see, and agree the records before you travel.
Preview9 min read
A generic inquiry gets a brochure; a specific one gets a model, a layout and an expected line speed. Which field decides which part of the answer, and the checklist for each machine family.
Preview8 min read
Two plants can buy the same line and get different results. The difference is usually power, space and strip handling — the conditions you can check before the machine is built.
Have a pipe spec in hand? Send the diameter range, wall range, grade and workshop length — engineers reply with a model and layout.