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Title 46: Shipping
CHAPTER I: COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
SUBCHAPTER O: CERTAIN BULK DANGEROUS CARGOES
PART 154: SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES
Subpart C: Design, Construction and Equipment
: Hull Structure
154.182 - Contiguous hull structure: Production weld test.
If a portion of the contiguous hull structure is designed for a temperature colder than ?34 ?C (?30 ?F) and is not part of the secondary barrier, each 100m (328 ft.) of full penetration butt welded joints in that portion of the contiguous hull structure must pass the following production weld tests in the position that the joint is welded:
(a) Bend tests under ? 57.06-4 of this chapter.
(b) A Charpy V-notch toughness test under ? 57.06-5 of this chapter on one set of 3 specimens alternating the notch location on successive tests between the center of the weld and the most critical location in the heat affected zone. 2
2 The most critical location in the heat affected zone of the weld is based on procedure qualification results, except austenitic stainless steel need have notches only in the center of the weld.
(c) If the contiguous hull structure does not pass the test under paragraph (b) of this section, the retest procedures under ? 54.05-5(c) must be met.
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