# Preparation for welding.

**Citation:** 49 CFR 192.235  
**Type / status:** regulation / current  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** 2026-08-18  
**Published:** Not stated

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

## Document text

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.

## Provenance

- Official: Yes
- Source: <https://www.ecfr.gov/on/2026-08-18/title-49/section-192.235>
- Source ID: `ecfr`
- SHA-256: `887fe8aa05e849bdfbcaa9b53ebbd17b917f6328a03cd9ec16afcbe17ce2376c`
- Retrieved: 2026-08-20T05:54:34.435Z
- Exported: 2026-08-22T21:15:57.102Z
- Document slug: `49-cfr-192-235`

### Source metadata

```json
{
  "cfrTitle": 49,
  "part": "192",
  "section": "192.235",
  "subpart": "Subpart E—Welding of Steel in Pipelines",
  "corpusVersion": "2026-08-18",
  "jurisdiction": "US"
}
```