# Preparation for welding.

- **operation:** document
- **citation:** 49 CFR 192.235
- **title:** Preparation for welding.
- **source type:** regulation
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** current
- **official:** true
- **published on:** Not available
- **effective on:** 2026-08-18
- **summary:** Before beginning any welding, the welding surfaces must be clean and free of any material that may be detrimental to the weld, and the pipe or component must be aligned to provide the most favorable condition for depositing the root bead. This alignment must be preserved while the root bead is being
- **machine formats:** - **json:** https://regulus.evalyn.ai/document/49-cfr-192-235.json
- **markdown:** https://regulus.evalyn.ai/document/49-cfr-192-235.md
- **app url:** https://regulus.evalyn.ai/document/49-cfr-192-235
- **source url:** https://www.ecfr.gov/on/2026-08-18/title-49/section-192.235
**body:**

Before beginning any welding, the welding surfaces must be clean and free of any material that may be detrimental to the weld, and the pipe or component must be aligned to provide the most favorable condition for depositing the root bead. This alignment must be preserved while the root bead is being deposited.
- **truncated:** false
- **body characters:** 311