---
title: In-line Galvanizing (ILG) | one to ONE Holdings
description: In-line galvanizing (ILG) is a continuous method of applying a protective zinc coating to steel, which is directly integrated into the manufacturing line.
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Perfecting imperfections with one to ONE

# Glossary

### GLOSSARYTerms A-Z

- [Glossary](https://www.o2oh.com/glossary)
- [ALL](https://www.o2oh.com/glossary?val=all)
- [A～G](https://www.o2oh.com/glossary?val=a_g)
- [H～N](https://www.o2oh.com/glossary?val=h_n)
- [O～U](https://www.o2oh.com/glossary?val=o_u)
- [V～Z](https://www.o2oh.com/glossary?val=v_z)
- [Numbers ・ Symbols](https://www.o2oh.com/glossary?val=0_9)

# In-line Galvanizing (ILG)

In-line galvanizing (ILG) is a continuous method of applying a protective [zinc](https://www.o2oh.com/glossary/zinc) coating to steel, a process which is directly integrated into the manufacturing line. Unlike traditional batch [hot-dip galvanizing](https://www.o2oh.com/glossary/hot-dip-galvanizing), where finished components are dipped, ILG integrates the galvanizing step directly into the manufacturing line. 

This results in superior coating quality and efficiency. From a [sustainability](https://www.o2oh.com/glossary/sustainability) perspective, ILG streamlines production, reduces energy consumption, and minimizes waste, while extending the product's lifespan.

An o2Oh's group company, U.S.-based [Superior Technologies](https://www.superior-tech.net/)’ (STI) [Zinc-Tech™](https://www.superior-tech.net/solutions/galvanizing-process) is a proprietary ILG technology. A key feature of Zinc-Tech is its high degree of adaptability. By integrating our galvanizing equipment into existing tube-making facilities, it's possible to upgrade a company's production line to a continuous ILG steel tube manufacturing facility, maximizing the use of their current assets and enabling the creation of higher-value products.

[Daiwa Steel Tube Industries ](https://www.daiwast.co.jp/en)(DSTI) in Japan, a core company of o2Oh, has combined Zinc-Tech™ with tube-making equipment to create its own proprietary continuous ILG steel tube manufacturing facility, known as the "[Daiwa Z Process](https://www.daiwast.co.jp/en/process)." The diagram below illustrates its proprietary method.

![Diagram contrasting conventional tube manufacturing with the Daiwa Z Process and Perfect Post Zinc (PPZ) method. The Daiwa Z Process integrates tube making and galvanizing for efficiency, while PPZ emphasizes interior galvanization before forming and hot-dip galvanizing for superior rust resistance.](https://www.o2oh.com/hs-fs/hubfs/%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88%202025-09-03%2011.55.17.png?width=630&height=239&name=%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E3%82%B7%E3%83%A7%E3%83%83%E3%83%88%202025-09-03%2011.55.17.png)

In step 5, the inside of the steel tube is coated with molten zinc while still in a flat sheet form, and in step 8, the outside is coated with molten zinc after it has been formed into a steel tube. 

Integrating Zinc-Tech galvanizing equipment into existing tube-making facilities allows for the establishment of a continuous ILG steel tube manufacturing facility. This high degree of adaptability, which allows for the maximization of existing equipment and an upgrade to a line that produces higher-value products, is a great strength and a key feature of our ILG.

 

Diagram of DSTI’s 'Daiwa Z Process,' a unique in-line galvanizing method.

### RELATED WORDS

---

- [International Data Spaces (IDS)](https://www.o2oh.com/glossary/international-data-spaces-ids)
- [Interoperability](https://www.o2oh.com/glossary/interoperability)
- [Institutional knowledge](https://www.o2oh.com/glossary/institutional-knowledge)
- [IFRS S2](https://www.o2oh.com/glossary/ifrs-s2)
- [IFRS S1](https://www.o2oh.com/glossary/ifrs-s1)
- [IFRS](https://www.o2oh.com/glossary/ifrs)
- [TCFD](https://www.o2oh.com/glossary/tcfd)
- [IT-OT convergence](https://www.o2oh.com/glossary/it-ot-convergence)
- [ISSB](https://www.o2oh.com/glossary/issb)
- [Integrated Reporting](https://www.o2oh.com/glossary/integrated-reporting)
- [Industrial Metabolism](https://www.o2oh.com/glossary/industrial-metabolism)
- [Iron](https://www.o2oh.com/glossary/iron)

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