Aside from the hydraulics of such a transfer, in the US the Coast Guard and Environmental People all have an interest in such a process. The Coast Guard did have very specific rules for fuel transfer hoses.
I've cut & pasted below some data from a Chevron shipping spec on hoses that may help some, probably more than you're looking for, but....:
Hose for Marine Transfers
Hose in this category includes cargo hose, lightweight cargo hose for barge use, and SPM hose. Hose for marine transfers must be conductive, but either one length in the string must be nonconductive, or else there must be an insulating flange between the shore-to-ship system. Often this flange is in the riser piping onshore. This electrical insulation is required to prevent sparking, since ships and barges are at one potential and shore at another. Bonding alone does not make it safe. For SPM hose, the over-the-rail hose should be nonconductive or the end connection should be insulating.
This specification is meant to supplement “Guide to Purchasing, Manufacturing and Testing of Loading and Discharge Hoses for Offshore Moorings”, by the Oil Companies International Marine Forum (OCIMF), 1991.
References
1. International Safety Guide for Oil Tankers and Terminals, Witherby & Co., Ltd., England. Chevron Shipping uses this guide as a minimum and must comply with all the Coast Guard regulations (CFRs). The guide has 3 sections of interest: Connections, Cargo Hose, and Static Control.
2. API Recommended Practice 2003, Protection Against Ignitions Arising Out of Static, Lightning, and Stray Currents. A copy of API RP-2003 is in an appendix
of the Fire Protection Manual.
3. Chevron Shipping Marine Regulation (MR) 200. This document is based on Reference 1.
4. Steam Hose Survey, D. L. Nail, Materials Division File 38.35, September 1, 1989.
Federal Safety Requirements
U.S. Federal rules and regulations pertaining to safety define the testing and pressure limitations in the use of hose in a cargo piping system (Federal Register, Volume 35, No. 177—9/11/70 Title 33, Chapter 1, Part 126.15, Paragraph 7-IV and 7-V). Hose must not be used in a cargo piping system where the maximum available pressure (pump, static head, and surge or relief valve setting) exceeds the maximum rated working pressure of the hose. Instead of
installing relief systems in the hard piping at wharves, the Company has elected to use hose designed as strong as the Class 150 piping system.
Federal Pollution Control Rules.
Federal rules and regulations covering pollution control relating to hose are listed in the Federal Register Vol. 37, No. 246, 12-21-72, Title 33, Part II, Chapter 1, Parts 154.500, 154.20, and 156.170. Paragraph 156.170 requires that information about each hose be available in one of two ways:
1 The hose must be stenciled with product(s) handled (“oil service”), date of manufacture, burst pressure, manufacturer's recommended working pressure, date of last test, and pressure used for that test, or
2 This data must be recorded elsewhere at the facility and the hose marked so as to identify it with the information in the record.
Piping Manual 500 Flexible Hose Chevron Corporation 500-11 January 1998 Test requirements (pressure and frequency of test) as stated in the Federal Register, Volume 35 (pertaining to safety) must take precedence over that stated in Volume 37 where there is an apparent conflict.
Applying Federal Regulations Outside the U.S.
It is recommended that these regulations be applied to hose supplied to all Company installations although some
berthing locations may be outside the continental limits of the United States.
Transfer System Pressure Gage.
Each piping system should have a recording pressure
gage, in operating condition with chart, in the transfer system.
Greg Lamberson, BS, MBA
Consultant - Upstream Energy
Website:
