MIL-STD-2199 Coverings For Waterborne Main Propulsion Shafting On U.S. Naval Surface Ships And SubmarinesThis standard covers standard practices for the application of a four-layer shaft covering system on the body areas of waterborne main propulsion shafting. Material and application requirements are also provided for coatings that are to be applied to waterborne shaft flange assemblies.

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MIL-STD-2199A APPENDIX B

PROCEDURE FOR INSPECTING AND REPAIRING THE FOUR-LAYER SHAFT COVERING SYSTEM B.1 SCOPE

B.1.1 Scope. This appendix details the procedure for inspecting and repairing the four-layer shaft covering system outlined within this standard. This appendix is a mandatory part of this standard. The information contained herein is intended for compliance.

B.2 APPLICABLE DOCUMENTS

B.2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 of this appendix. This section does not include documents cited in other sections of this appendix or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3, 4, or 5 of this appendix, whether or not they are listed.

B.2.2 Government documents.

B.2.2.1 Other Government documents, drawings, and publications. The following other Government documents, drawings, and publications form a part of this appendix to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract.

NAVAL SEA SYSTEMS COMMAND (NAVSEA) PUBLICATIONS

S0600-AA-PRO-130/13 - NSTM Chapter 13, Underwater Ship Husbandry Manual; Propulsion

Shaft Covering Repair

S9086-HM-STM-010/243 - NSTM Chapter 243, Propulsion Shafting

S9086-VG-STM-010/634 - NSTM Chapter 634, Deck Coverings

(Copies of these documents are available from NACE International, 1440 South Creek Drive, Houston, TX

77084-4906 or online at www.nace.org.)

B.2.3 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained.

B.3 QUALITY CONTROL

Correcting defects once the GRP has cured is costly and time consuming. To provide for quality control in the process, the following steps shall be observed:

a. Select proper materials as specified herein.

b. Check shelf-life to ensure that the resin system components are not over age. c. Provide proper environmental conditions.

d. Prepare and clean shaft.

e. Proportion, determine the mass, and mix resin.

f. For every step in the process, pay particular attention to the shaft/sleeve interface.

g. Permit the elastomeric coating, sealing/fairing compound, and GRP to cure before handling.

h. Maintain labeled control samples of each mixed and applied batch (about 1 ounce) of materials to monitor cure characteristics of each component of the shaft covering system.