CFR > Title 46 - Shipping > CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY > SUBCHAPTER F—MARINE ENGINEERING (parts 50 to 64) > PART 56—PIPING SYSTEMS AND APPURTENANCES > SUBPART 56.25—Pipe Flanges, Blanks, Flange Facings, Gaskets, and Bolting (§56.25-5 to §56.25-20)