AM711468 October 2024 Spec Matrix - NSWCPD Responses.pdf
PDF 146 KB Posted
- Attached to
- N64498-24-R-0050
- Solicitation number
- N6449824R0050
About this file
This document is a Comparison Report between the customer's drawing requirements and the supplier's (Rochester Cable, Inc.) compliance for the AN/BRR-6 Tow Cable. The report covers various requirements such as material, temperature, cable length, conductor design, armor design, ribbon fairing, workmanship, quality assurance provisions, electrical tests, hydrostatic tests, strength tests, flexibility tests, and preparation for delivery. The supplier has noted exceptions or minor exceptions to some of the requirements, and provided clarifications and comments. The report also references a related federal contract opportunity, Solicitation Number N64498-24-R-0050, issued by the Department of the Navy Naval Sea Systems Command for the procurement of the AN/BRR-6 Tow Cable.
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Other files
| File | Type | Posted |
|---|---|---|
| N6449824R00500007.pdf | ||
| AM711437 October 2024 Spec Matrix - NSWCPD Responses.pdf | ||
| N6449824R0050 Amendment 6.pdf | ||
| N6449824R00500004.pdf | ||
| N6449824R00500003.pdf | ||
| N6449824R00500001.pdf | ||
| N6449824R00500005.pdf | ||
| N6449824R00500002.pdf | ||
| N6449824R0050.pdf |
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Text version
CUSTOMER NSWC
DRAWING NAVSEA DWG 8628345 Rev - (AN/BRR-6 Tow Cable)
RC DRAWING AM711468 Rev A
DATE 10/22/2024
Exception
Minor Exception
Understood, Complies
Rochester Cable, Inc.
751 Old Brandy Road
Culpeper, Virginia 22701
Tel (+1) 540-825-2111
Fax (+1) 540-825-2238 www.rochestercable.com
Comparison Report
Customer Requirements RC Compliance RC Comments
1.0 Scope Understood.
2.0 Applicable Documents Understood.
2.1 Specifications Understood.
2.2 Standards Understood.
2.3 Commercial Publications Understood.
2.4 Drawings Understood.
2.5 NAVSEA Specifications N/A. Rochester does not have these drawings.
3.0 Requirements Understood.
Table 1
1. Material Comply.
2. Temperature
2.1 Operating Temp Comply.
2.2 Non-Operating Temp. Comply.
3. Cable Length Comply.
4. Conductor Design Understood.
5. Armor Design Understood.
6. Ribbon Fairing
6.1 Ribbon Fairing Material Comply. Hardness should read 90 +/- 6 Shore A.
6.2 Ribbon Fairing Dimensions Comply.
6.3 Ribbon Fairing Installation &
Orientation
Comply.
7. Workmanship Comply.
4.0 Quality Assurance Provisions Understood.
Table 2
1. Construction Comply.
michael.resciniti Sticky Note Concur, will update on next drawing revision.
michael.resciniti Sticky Note Request drawings from Prime
(AN/BRR-6 Tow Cable)
Culpeper, Virginia 22701
Tel (+1) 540-825-2111
Fax (+1) 540-825-2238 www.rochestercable.com
Comparison Report
2. Materials Comply.
3. Electrical Tests
3.1 Insulated Conductor Clarification. Voltage should say 4,000 Vac/hf – not 4,000 VDC.
3.2 Insulation Resistance
Exception. Given that the production and test areas are not environmentally controlled – a temp correction factor will be utilized. RH in the production area can exceed 60% in summer.
3.3 Dielectric Withstand Voltage Comply.
3.4 DC Resistance
Exception. Given that the production and test areas are not environmentally controlled – a temp correction factor will be utilized. RH in the production area can exceed 60% in summer.
3.5 Capacitance
Exception. ●Based upon values measured during most recent cable build (Q61730) – the adjacent conductor capacitance values should be 22.6 pf/ft ± 10%.
● It is not clear what 4.1.2.4 of Reference 2.5 is.
4. Hydrostatic Tests Comply. A single 1,500 ft length will be taken from each master production length and tested
5. Strength Test Comply. It is assumed cable is in a fixed end condition
6 Flexibility Tests Understood.
6.1 Sheaves Comply.
6.2 Loading Conditions Comply.
5.0 Preparation For Delivery
5.1 Comply.
5.2 Comply.
5.3 Comply.
michael.resciniti Sticky Note Values provided are established at a reference condition of 25C at a relative humidity of 50%. Temperature corrections shall be permitted. (methods shall be concurred to by NSWCPD) michael.resciniti Sticky Note Values provided are established at a reference condition of 25C at a relative humidity of 50%. Temperature corrections shall be permitted. (methods shall be concurred to by NSWCPD) michael.resciniti Sticky Note Concur, will be updated on next rev.
michael.resciniti Sticky Note NUWC measured 23.48 on the 1500 ft section. 22.6 was the simulated value that Isaac calculated. NSWCPD will adjust the value to 23.0 +/- 10% to account for the variance.
4.1.2.4 of Reference 2.5 is the assembly production spec. (8628346)
(AN/BRR-6 Tow Cable)
Culpeper, Virginia 22701
Tel (+1) 540-825-2111
Fax (+1) 540-825-2238 www.rochestercable.com
Comparison Report
5.4 Understood.
5.5 Understood.
6. Notes
6.1 Understood.
6.2 Understood.
Table 3
Conductor Element A Exception. Single ends of Cu Clad steel are brazed when necessary. Minimum spacing is two full lay lengths.
Conductor Element B Comply. -
Electrical Core Comply.
Inner Layer Comply.
Outer Layer Comply.
michael.resciniti Sticky Note Unclear what "single ends" is referring to. Due to early Bend over Sheave failures at NSWCPD, we would like to understand if this condition could have been part of the root cause. Request Rochester provide brazing map of cable for future failure analysis if requirement can't be met.
File details come from the government source that posted it. Updated .