3. Requirements for Type A and Type B Pressure Vessels
3.1 Drawings and Plans
Supplier should develop detailed drawings and plans for Buyer review in accordance with 46 CFR, Subpart 54.01-18 and 54.01-5e. These documents should be sent to Buyer for review with the other Supplier data requirements. These plans may need to be submitted to the USCG for review (see sections 4 and 5 below). These plans must be certified by a registered professional engineer as meeting the design requirements of this Specification, this Appendix and the ASME Code. The certification must appear on all drawings and analyses.
3.2 Pressure Vessel Identification
In addition to the identification stamping information listed in Section 9.0 of “Specification - Pressure Vessels”, pressure vessel identification should include the USCG class (see section 2.0 or Table 54.01-5B in 46 CFR Part 54 for the listing of Class). The USCG symbol and number should be stamped on the pressure vessel by the Marine Inspector, either at the shop for Type A vessels or at the installation location for Type B vessels
The Supplier should complete and certify the data reports required by 46 CFR Subpart 54.10-25.
4. Additional Requirements for Type A Vessels
Type A pressure vessels will require USCG plan approval. The detailed plans developed in accordance with paragraph 3.1 should be submitted by Supplier in accordance with 46 CFR Part 50.20.
Type A vessels will require USCG shop inspection and stamp by USCG Marine Inspectors as described in 46 CFR Subparts 54.10-3, 54.10-10, and 50.30-20. Supplier should notify the Officer in Charge of Marine Inspection of the intended fabrication of vessels that will require Coast Guard inspection.
- Type A vessels will require hydrostatic testing in accordance with CFR Subpart 54.10-10.
- Type A Vessels will be designed and fabricated for MAWP in accordance with 46 CFR Subpart 54.10-5.
Fabrication and welding for Type A vessels should be in accordance with 46 CFR Subpart 54.20 and 46 CFR Part 57.
Type A vessels also require USCG field inspection at the installation site.
5. Additional Requirements for Type B Vessels
For Type B pressure vessels, the Supplier will not be required to submit the documentation, as described in Section 3.1, to the USCG for approval prior to fabrication. In addition, the USCG does not require a shop inspection, but will perform a field inspection of the vessels and plans. The USCG visual field examination of the vessels and review of the plans will be made prior to installation, according to 46 CFR Subpart 54.10-3c. Following satisfactory USCG field inspection, Type B vessels will receive a USCG stamp.
6. Requirements for Type C Vessels
Type C pressure vessels do not have any additional requirements of 46 CFR Part 54. These vessels should comply with this Specification and the ASME Code.