---
title: Black Tube
description: Black tubes are untreated steel pipes, named for their dark surface.
---

[Glossary ](https://www.o2oh.com/glossary)

# [Black Tube](https://www.o2oh.com/glossary/black-tube)

 Written by [one to ONE Holdings](https://www.o2oh.com/glossary/author/one-to-one-holdings) | Sep 25, 2025 9:49:10 PM

Steel pipes that have not undergone galvanizing are sometimes called black tubes because their untreated surface appears black. In contrast, galvanized steel pipes are often referred to as [white tubes](https://www.o2oh.com/glossary/black-tube) because of their white, metallic appearance.

[View full post](https://www.o2oh.com/glossary/black-tube)

```json
{
  "@context" : "http://schema.org",
  "@type" : "BlogPosting",
  "author" : {
    "@type" : "Person",
    "name" : "one to ONE Holdings"
  },
  "dateModified" : "2025-09-25T21:56:17.221Z",
  "datePublished" : "2025-09-25T21:49:10Z",
  "headline" : "Black Tube",
  "image" : {
    "@type" : "ImageObject",
    "height" : 70,
    "url" : "https://8005843.fs1.hubspotusercontent-na1.net/hubfs/8005843/o2Oh_18mm.jpg",
    "width" : 106
  },
  "mainEntityOfPage" : "https://www.o2oh.com/glossary/black-tube",
  "publisher" : {
    "@type" : "Organization",
    "logo" : {
      "@type" : "ImageObject",
      "height" : 60,
      "url" : "/hs/hsstatic/content_shared_assets/static-1.4092/img/default-amp-logo.png",
      "width" : 60
    },
    "name" : "Glossary | one to ONE Holdings"
  }
}
```