0506_A_TEST MAIN AIR RECEIVERS REV A.docx

USNS SPEARHEAD

(JHSV 1)

TEST MAIN AIR RECEIVERS REV A

1.0 ABSTRACT

1.1 This item describes testing and recertification of the P & S Main Air Receivers to a higher pressure and provide R-Stamp of that higher pressure. Currently the receivers are rated for 38 bar. The new higher pressure will be 40 bar (581psi).

2.0 REFERENCES

2.1 DWG 8445351 Compressed Air System

2.2 MIS-NO-1852- Stbd Reciever Thickness Report

2.3 MIS-NO-1853- Stbd Reciever Weld Testing Report

2.4 MIS-NO-1854- Port Reciever Thickness Report

2.5 MIS-NO-1855- Port Reciever Weld Testing Report

3.0 ITEM LOCATION/DESCRIPTION

3.1 Location

3.1.1 Jet Equipment Room 1 (3-70-1)

3.1.2 Jet Equipment Room 2 (3-70-2)

3.2 Quantity

3.2.1 2 Main Air Receivers, 568 Liters.

4.0 GOVERNMENT FURNISHED EQUIPMENT/MATERIAL/SERVICE: None.

5.0 NOTES

5.1 The contractor and all subcontractors, regardless of tier must consult the General Technical Requirements (GTR) to determine applicability to this work item. In performance of this work item, the contractor and all subcontractors regardless of tier must comply with the requirements of all applicable GTR’s.

5.2 The contractor and all subcontractors, regardless of tier are advised to review other work items under this contract to determine their effect on the work required under this work item. Many of the definitions relating to performance of this work item are found in Work Item 001.

6.0 QUALITY ASSURANCE REQUIREMENTS

6.1 The contractor shall not work on the system until vessel crew has demonstrated Lock-Out Tag-Out process has been performed.

6.2 Recertification work shall be to ABS and ASME Code.

7.0 STATEMENT OF WORK REQUIRED

7.1 Furnish labor and materials to certify the two each (2) 568 Liter Main Air receivers to a higher pressure and provide R-stamp of that higher pressure. Currently, the receivers are rated at 38 bar. The new higher pressure is 40 bar (581 psi)

7.2 Perform all requirements to isolate and secure the Main Air Receivers from external system and return to service upon completion.

7.3 Port and Stbd Main Air Receivers (two total) shall have all butt weld joints 100% non-destructively tested by volumetric method of NDE (UT) to determine no quality defects are present in the weld joints of the upper and lower circumferential head to shell joints and vertical joints. These welds shall be tested 100%.

7.3.1 Provide all labor, equipment, rigging and matieral to repair all weld quality defects identified in refs 2.3 and 2.5. Repair of all additional weld defects found will be subject of an RFP.

7.4 Perform random ultrasonic thickness gauging on 6 inch centers. Two hundred total readings per air receiver shall be measured and recorded for shell, top and bottom heads.

7.5 Perform all testing and services required to provide compliance for ABS and ASME pressure vessel code “U-Stamp” rating for the higher certified pressure.

7.6 Perform hydrostatic test of each tank to 1.33 X the new pressure of 40 bar.

7.6.1 ABS Surveyor, ASME representative and MSCREP Shall be called out to witness test.

7.7 Call out MSCREP and ABS for all tests.

7.8 Furnish and install two (2) relief valves item 012 per reference 2.1. Set relief valves to 570 PSI. Apply stainless steel labeled tag with relief valve setting and date of test. The removed relief valves shall be set to 570 PSI and returned to vessel Chief Engineer.

7.9 Furnish new stainless steel label plate on receivers. New label plates shall be stamped with MAWP, date of test and all required regulatory data.

7.9.1 Note: Coordinate with ABS/ASME requirements to determine when and where to locate label plate. Welding of label plate to receiver post hydro may void hydro test.

7.9.2 Remove old label plates.

7.10 Prep, prime and paint any disturbed areas to existing scheme.

7.11 Record and furnish the results of all tests and inspections. Furnish hard copy and electronic copies to vessel CE and MSCREP.

8.0 General Requirements: None additional.

0506 A-2 image1.emf

630COVER PAGE1A

630TOPSIDE PLAN VIEW & STBD PROFILE VIEW2A

63001 LEVEL WIRELESS ACCESS POINTS4A

630FWD ELEVATION5A

630COVER PAGE1A

Distribution Statement D:

Distribution authorized to the Department of Defense and DoD contractors only (Critical Technology, 1 Aug 03).

Warning:

This document contains technical data whose export is restricted by the Arms Export Control Act (Title 22, U.S.C., Sec. 2751, et seq.) or the Export Administration Act of 1979, as amended, Title 50, U.S.C., App. 2401 et seq.

Violations of these laws are subject to severe criminal penalties.

Destruction Notice:

Destroy by any method that shall prevent disclosure of contents or reconstruction of document.

This technical data is RELEASABLE within the AUSTAL JHSV Team under TA 1615-07 YES _X__NO__

(If NO, record un-releasable data information on this sheet. Data restriction rules within GD-AIDE must apply.)

AUSTAL JHSV TEAM

NOTE: REV C WAS UPDATED WITH XREF'S USED FROM MAY 17, 2011 RELEASE ON SHAREPOINT.

630AFT ELEVATION6A

630PORT PROFILE VIEW3A

NOTE: Frame Spacing is 1200 mm

580 FWD FRAME 26

1780 TYP

330 FWD OF FRAME 24

12830

13500

500 FWD FRAME 24

1070 TYP

220 FWD FRAME 26

1556 TYP

700 AFT FRAME 39

700 AFT FRAME 39

126 FWD FRAME 30

C4I ZONE

BRIDGE ZONE

C4I ZONE

BRIDGE ZONE

AVIATION ZONE

AT/FP

ZONE

ZONEAT/FP

Distribution statement D, military critical technology, export controlled

STBD PROFILE VIEW

FOR ALL WIRELESS ACCESS

POINT LOCATIONS PLEASE SEE

REFERENCE 3

PORT PROFILE VIEW

BRIDGE ZONE C4I ZONE

01 LEVEL

1000 1275

FRONT ELEVATION

AFT ELEVATION