---
kind: "unit"
title: "46"
title_heading: "Shipping"
key: "chI/subchF/part56"
level: "part"
label: "Part 56"
heading: "Piping Systems and Appurtenances"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/46/chI-subchF-part56"
sections_count: 105
---

# Part 56 — Piping Systems and Appurtenances

Title 46 C.F.R. — Shipping › Chapter I — Coast Guard, Department of Homeland Security › Subchapter F — Marine Engineering

## Contents

- [Subpart 56.01 — General](/cfr/46/chI-subchF-part56-subpart56.01.md)
- [Subpart 56.04 — Piping Classification](/cfr/46/chI-subchF-part56-subpart56.04.md)
- [Subpart 56.07 — Design](/cfr/46/chI-subchF-part56-subpart56.07.md)
- [Subpart 56.10 — Components](/cfr/46/chI-subchF-part56-subpart56.10.md)
- [Subpart 56.15 — Fittings](/cfr/46/chI-subchF-part56-subpart56.15.md)
- [Subpart 56.20 — Valves](/cfr/46/chI-subchF-part56-subpart56.20.md)
- [Subpart 56.25 — Pipe Flanges, Blanks, Flange Facings, Gaskets, and Bolting](/cfr/46/chI-subchF-part56-subpart56.25.md)
- [Subpart 56.30 — Selection and Limitations of Piping Joints](/cfr/46/chI-subchF-part56-subpart56.30.md)
- [Subpart 56.35 — Expansion, Flexibility and Supports](/cfr/46/chI-subchF-part56-subpart56.35.md)
- [Subpart 56.50 — Design Requirements Pertaining to Specific Systems](/cfr/46/chI-subchF-part56-subpart56.50.md)
- [Subpart 56.60 — Materials](/cfr/46/chI-subchF-part56-subpart56.60.md)
- [Subpart 56.65 — Fabrication, Assembly, and Erection](/cfr/46/chI-subchF-part56-subpart56.65.md)
- [Subpart 56.70 — Welding](/cfr/46/chI-subchF-part56-subpart56.70.md)
- [Subpart 56.75 — Brazing](/cfr/46/chI-subchF-part56-subpart56.75.md)
- [Subpart 56.80 — Bending and Forming](/cfr/46/chI-subchF-part56-subpart56.80.md)
- [Subpart 56.85 — Heat Treatment of Welds](/cfr/46/chI-subchF-part56-subpart56.85.md)
- [Subpart 56.90 — Assembly](/cfr/46/chI-subchF-part56-subpart56.90.md)
- [Subpart 56.95 — Inspection](/cfr/46/chI-subchF-part56-subpart56.95.md)
- [Subpart 56.97 — Pressure Tests](/cfr/46/chI-subchF-part56-subpart56.97.md)