USCGC_WALNUT_(WLB205)_Stuffing_Tube_Renewal_Cvu_.docx

S16-0013_30400_CVV_0816_225WLB

WORK ITEM 1: Weather Deck Stuffing Tubes, Remove/Renew/Repack

1. SCOPE

1.1 Intent. This work item describes the requirements for removing, renewing, and repacking various stuffing tubes on the weather decks on USCGC WALNUT (WLB205).

1.2 Government-furnished property.

None.

2. REFERENCES

Coast Guard Drawings Coast Guard Drawing 225-WLB_320_001, Rev AA, Electrical One-Line Diagram Coast Guard Drawing 225-WLB_320_002, Rev M, POWER SYS DK PLAN, FR. 30, FWD.

Coast Guard Drawing 225-WLB_320_006, Rev K, PWR SYS DK PLAN, MN DK & 01 LVL, FR 57-92, HULL BLK 960A/ 970.

Coast Guard Drawing 225-WLB_320_007, Rev R, PWR SYS DK PLAN, BLK 960B, 975 & 970 Coast Guard Drawing 225-WLB 321-2, Rev B, Cableways Master Plan Coast Guard Drawing 225-WLB_330_007, Rev AA, Electrical One-Line Diagram Coast Guard Drawing 225-WLB-422-1, Rev J, Navigation, Signal & Searchlight BLK WRG DK Plan, ARR & Elem. Wiring Diagram.

Coast Guard Drawing 225-WLB_432_005, Rev D, Sound Powered Telephone CKTS BLK, WRG DK PLAN & ELEM WRD DIAG.

Coast Guard Drawing 225-WLB_433_001, Rev. J, Announcing System Block Diagram & Isometric.

Coast Guard Drawing 225-WLB_436_004, Rev. D, CEASE FIRE CKT 5U BLOCK, WRG DK PLAN & ELEM WRG DIAG.

Coast Guard Drawing 225-WLB 635-1, Rev J, Hull Thermal Acoustic Insulation Schedule Coast Guard Publications Surface Forces Logistics Center Standard Specification (SFLC Std Spec) 0000, 2014, General Requirements Surface Forces Logistics Center Standard Specification (SFLC Std Spec) 0740, 2014, Welding and Allied Processes Surface Forces Logistics Center Standard Specification (SFLC Std Spec) 3041, 2014, Shipboard Electrical Cable Test Surface Forces Logistics Center Standard Specification (SFLC Std Spec) 3042, 2014, Shipboard Electrical Cable Removal, Relocation, Splice, Repair, and Installation Surface Forces Logistics Center Standard Specification (SFLC Std Spec) 6310, 2014, Requirements for Preservation of Ship Structures Other References MIL-STD-2003-3, Sep 2009, Electric Plant Installation Standard Methods for Surface Ships & Submarines (Penetrations) MIL-I-3064, Mar 1991, Insulation, Electrical, Plastic-Sealer

3. REQUIREMENTS

3.1 General.

3.1.1 CIR.

None.

3.1.2 Tech Rep.

Not applicable.

3.1.3 Protective measures. Furnish and install suitable covering to seal off and protect all non-affected surfaces/equipment and spaces in the vicinity of the work area against contamination during the performance of work. Upon completion of work, remove protective material and inspect for the presence of contamination. Clean all equipment and spaces, contaminated due to improper protection, to original condition of cleanliness.

3.1.4 Interferences. Be aware that interferences in way of work include, but are not limited to the below-listed. Handle all interferences in accordance with SFLC Std Spec 0000, paragraph 3.3.5 (Interferences):

· Compartment thermal insulation.

· Cables listed in Table II below.

· Deck coverings.

· False overhead and/or bulkhead paneling.

3.1.5 Welding. Perform all welding and nondestructive inspections in accordance with SFLC Std Spec 0740.

3.2 Cable removal. Disconnect the cables listed below in Table II below per Section 3.3 of SFLC Std Spec 3042. The affected circuits are shown on Coast Guard Drawings 225-WLB_320-(1, -2, -6, -7), 330-7, 422-1, 432-(5-9), 433-1 and 437-7. Pull each disconnected cable through its stuffing tube and coil out of the way. Protect exposed cable ends, jacks, receptacles, and connectors from water and foreign material intrusion.

3.3 Insulation removal. As needed to accommodate hot work, remove and scrap thermal insulation from the interior of the compartment near the stuffing tubes listed in Tables I and II. Submit a CFR if interior plating surfaces are significantly corroded (steel less than 75% of original thickness) and work scope does not include steel insert.

3.4 Stuffing tube removal. Crop out the unused stuffing tubes listed below in Table I for removal. Patch the resultant openings flush with the surrounding surface. See paragraph 3.12 of SFLC Std Spec 0740 for plug welding and insert plate requirements.

3.5 Stuffing tube renewal. Crop out the remaining stuffing tubes and associated kickpipes listed in Table II. Prepare the affected plating surfaces, selecting, spacing, and installing the new stuffing tubes per the following subparagraphs, as applicable, deferring any installation of plastic sealer until after testing of Section 3.7 below is completed.

3.5.1 Prepare the deck plating to receive a new steel kickpipe or swage tube of standard or extra heavy wall thickness. Select, space, and install tubes in accordance with MIL-STD-2003-3. Use the installation method of Figure 3D1 (kickpipe and stuffing tube) or 3D2 (swage tube) in Appendix D, welding both sides of the deck plating.

3.5.2 Prepare the bulkhead plating to receive a new steel pipe or swage tube of standard or extra heavy wall thickness. Select, space, and install tubes in accordance with MIL-STD-2003-3. Use the installation method of Figure 3B5-4 (pipe and stuffing tube) or 3B5-6 (swage tube) in Appendix B, welding both sides of the bulkhead plating.

3.5.3 If steel insert is required, prepare steel plate of similar thickness to surrounding metal in accordance with SFLC Standard Specification 0740. All welds shall be tested in accordance with magnetic particle inspection (ASTM E1444) or liquid penetrant inspection (ASTM E1417).

3.6 Cable reinstallation. Reinstall and reconnect the cables listed below in Tables II and III per Section 3.3 of SFLC Std Spec 3042. All stuffing tube packing materials shall be new and not older than manufacturer’s recommended shelf life. Defer any installation of plastic sealer until after testing of Section 3.7 below is completed.

3.6.1 Replace about 25 FT cable of the Sound Power Telephone (SPP) circuit C1JV9 (See photograph item #10) from the connection box A to the SPP Jack receptacle with a new cable Type LS2SWU-1, MIL-DTL-24643/33-01-UN in according with DWG 225-WLB-432-5, Sheet 2 prior to the stuffing tube repacking renewal.

3.7 Testing. For each stuffing tube and associated circuit, ensure that the following tests are performed:

3.7.1 The cable insulation resistance test of SFLC Std Spec 3041, as directed by SFLC Std Spec 3042, paragraph 3.3.9.

3.7.2 The water hose test of Appendix C of SFLC Std Spec 0740, as directed by SFLC Std Spec 3042, paragraph 3.3.10, to verify that the plating patch or cable packing and stuffing tube welds are watertight.

3.7.3 The post installation operational test, as directed by SFLC Std Spec 0000, paragraph 3.3.5.1.

3.8 Touch-up preservation. Prepare and coat all new and disturbed exterior and interior surfaces to match existing adjacent surfaces in accordance with SFLC Std Spec 6310.

3.9 Insulation installation. Renew removed insulation material as shown on Coast Guard Drawing 225-WLB 635-1. Coat the newly installed insulation using the system specified for “Insulation Surfaces, Fiberglass Sheet/Closed Cell PVC Foam” in SFLC Std Spec 6310.

3.10 Plastic sealer. After satisfactory completion of testing, apply plastic sealer electrical insulation (MIL-I-3064, Type HF) if required by the installation method of MIL-STD-2003-3 used to install the stuffing tube

TABLE I – Stuffing Tube ReMOVal List

TABLE II – Stuffing Tube Renewal List

F/O Transfer E-Stop Control Box

03-67-2-1L-B

PNL (L5)

SUMBERSIBLE PUMP RCPT

Circuit Breaker # 450V PP 1-67-2, PNL (P22)

TABLE III – Stuffing Tube Repacking List

F/O Transfer E-Stop Control Box

03-67-2-1L-B

SUMBERSIBLE PUMP RCPT

4. NOTES

4.1 The following stuffing and swage tube data is provided for information:

TABLE IV – Stuffing Tube Data Cable

Military Part Number

(mils)

[BULKHEAD] Swage Tube Assembly* Preformed Packing Assembly

[M24235/17-001]

M16685-2IA

[M24235/17-001]

M16685-2IA

[M24235/17-003]

M16685-2IC

[M24235/17-002]

M16685-2IB

[M24235/17-002]

M16685-2IB

[M24235/17-001

M16685-2IA

[M24235/17-003]

M16685-2IC

[M24235/17-003]

M16685-2IC

[M24235/17-003]

M16685-2IC

[M24235/17-001]

M16685-2IA

[M24235/17-001]

M16685-2IA

* A tube assembly consists of the tube body, gland nut, and gland ring. Order packing separately.

4.1.1 The contractor shall verify all cable and stuffing tube size in Table I prior to procuring materials.

4.2 Below are photographs of the various work areas.

image3.png image4.png image5.png image6.png image7.png image8.png image9.png image10.png image11.png image1.png image2.png