Navesea S9074-AR-GIB-010-278 Chg_A.pdf

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S9074-AR-GIB-010A/278

NAVSEA TECHNICAL PUBLICATION

REQUIREMENTS FOR FABRICATION WELDING AND

INSPECTION, AND CASTING INSPECTION AND

REPAIR FOR MACHINERY, PIPING, AND PRESSURE

VESSELS

DISTRIBUTION STATEMENT A: APPROVED FOR PUBLIC RELEASE; DISTRIBUTION UNLIMITED

NAVAL SEA SYSTEMS COMMAND

01 AUGUST 1995

E A 14 FEBRUARY 2013

NAVSEA TECHNICAL PUBLICATION CERTIFICATION SHEET 1 of 1

Certification Applies to: New Document Revision Change

Applicable TMIN/Pub. No. S9074-AR-GIB-010A/278

Publication Date (Mo, Day, Yr) 02/14/13

Title: REQUIREMENTS FOR FABRICATION WELDING AND INSPECTION, AND CASTING

INSPECTION AND REPAIR FOR MACHINERY, PIPING, AND PRESSURE VESSELS

CHANGES AND REVISIONS

Purpose: To clarify visual inspection requirements for nonferrous castings and titanium weld color.

TMDER/ACN Numbers Incorporated: None

Continue on reverse side or add pages as needed

CERTIFICATION STATEMENT

This is to certify that responsible NAVSEA activities have reviewed the above identified document for technical adequacy and suitability for the intended use. This form is for internal NAVSEA management use only, and does not imply contractual approval or acceptance of the technical publication by the

Government.

Name Signature Organization Code Date

W.E. Mitchell

NAVSEA

05P2

02/14/13

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RECORD OF REVISIONS

REVISION NO. DATE ENTERED BY

Change A

01 August 1995

14 February 2013

Complete Reprint Incorporated

Change Package

Change A i

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LIST OF EFFECTIVE PAGES

Insert latest changed pages and dispose of superseded pages in accordance with applicable regulations.

Dates of issue for original and subsequent revisions:

Original .................... 0 .................. 01 August 1995

Change ..................... A ................. 14 February 2013

TOTAL NUMBER OF PAGES IN THIS PUBLICATION IS 162, CONSISTING OF THE FOLLOWING:

Page No. *Change No.

Title page .................................................................................................................................................................... A i-ii ............................................................................................................................................................................... A iii-vii viii............................................................................................................................................................................... A ix x-xi/xii ........................................................................................................................................................................ A

1-16

17 ................................................................................................................................................................................ A

18-96

97 ................................................................................................................................................................................ A

98-111

112-112.2.................................................................................................................................................................... A

113-142

*Zero in this column indicates an original page.

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S9074-AR-GIB-010A/278

CONTENTS – Continued

PARAGRAPH PAGE

10.3.3 Class A pressure vessels and class T turbines

10.3.4 Repaired welds

10.3.5 Base metal repair

10.3.6 Weld deposited cladding, hardsurfacing, and buttering

10.3.7 Loss of preheat and interpass

10.3.8 Tack welds

10.3.9 Seal welds

10.3.10 Substitution of VT inspection

10.3.11 Non-structural welds

10.3.12 MT inspection for MIL-140S, MIL120S and MIL-12018 welds in class A-F

A-1, A-2, A-LT, P-1, P-LT and M-1 (Category A and B)

10.3.13 Titanium and titanium alloy welds

10.4 Acceptance standards

10.4.1 Visual examination

10.4.1.1 General

10.4.1.2 Welds

10.4.1.3 Base material

10.4.2 MT and PT inspection

10.4.2.1 Adjacent casting base material

10.4.3 Radiography

10.4.4 UT inspection

10.4.4.1 UT inspection of weld deposited buttering

10.4.4.1.1 Calibration for inspecting weld deposited buttering for both weld metal defects and lack of bond

10.5 Disposition of rejected welds

10.6 Hardness testing of titanium and titanium alloy flame

cut surfaces

11. ALLIED PROCESSES

11.1 General

11.2 Thermal spraying

11.3 Thermal cutting

11.3.1 Titanium and titanium alloys

11.4 Resistance welding

11.5 Stud welding

11.5.1 General

11.5.1.1 Bend testing

11.5.1.2 Torque testing

11.5.1.3 Rejection procedure

11.5.2 Pressure containing applications

11.5.3 Nonpressure containing applications

11.5.4 Temporary attachments

11.5.5 Repair to studs

11.6 Hard surfacing valve parts

11.6.1 Preheating and heat treatment of carbon and alloy steel

11.6.2 Inspection

11.6.3 Acceptance

11.7 Pipe and tube bending

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PARAGRAPH PAGE

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12. CASTING INSPECTION

12.1 General

12.2 Definitions

12.2.1 Pressure containing

12.2.2 Sub-category

12.3 Inspection details

12.3.1 General

12.3.2 Visual examination

12.3.2.1 Inspection qualification

12.3.3 NDT

12.3.4 Radiographic standard shooting sketches

12.3.5 Substitution of tests

12.4 Acceptance criteria

12.4.1 Visual examination

12.4.2 MT, PT and RT ...................................................................................................................... .112.2

12.4.2.1 RT evaluations

12.4.2.2 Investment castings

12.4.3 Pressure test

12.4.4 UT

12.5 Extent of NDT

12.5.1 VT

12.5.2 Pressure tests

12.5.3 Extent of radiography

12.5.4 Extent of MT or PT inspection for ferrous castings

12.5.5 Extent of PT for nonferrous castings

12.5.6 Records for NDT of castings

12.6 NDT responsibilities

12.6.1 Designer responsibility

12.6.2 Contractor responsibility

12.6.3 Approvals

12.6.3.1 Engineering drawings

12.7 Weldability tests

12.8 Sample castings

13. REPAIR OF CASTINGS

13.1 Impregnation

13.1.1 Impregnation authority

13.1.2 Impregnation procedure

13.2 Repair welding

13.2.1 General

13.2.2 Minor repairs

13.2.3 Nominal repairs

13.2.4 Special repairs

13.2.5 Authority for repair of castings

13.2.5.1 Repair procedures and report

13.2.6 Heat treated weld repairs

13.2.7 Stress relief of weld repairs

13.2.7.1 Alternate temperature measuring methods for furnace and local stress relief

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PARAGRAPH PAGE

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13.2.8 Inspection of repair welds

13.2.8.1 Exploration and repair of cracks

13.2.8.2 Surface passes

13.2.8.3 Radiography of completed repair

13.2.9 Acceptance standards for repair welds

13.2.10 Records

13.2.10.1 Maintenance of records

13.2.11 Repair welding on existing shipboard castings

14. NDT REQUIREMENTS FOR TURBINE PARTS

14.1 General

14.2 Inspection requirements

14.2.2 Radiography of castings and steam chests

14.3 Performing NDT inspection

14.3.2 Radiographic standard shooting sketches

14.4 Acceptance standards for NDT inspection

14.4.1 Radiography

14.4.2 MT and PT inspection of welds

14.4.3 MT and PT inspection of castings

14.5 UT inspection

14.6 Additional inspection for ferritic materials

15. NDT INSPECTION REQUIREMENTS FOR PROPULSION REDUCTION

GEARS AND STEAM TURBINE DRIVEN AUXILIARY GEARS

15.1 General

15.2 Inspection requirements

15.3 Performing NDT inspection

15.4 Acceptance standards for NDT inspection

15.4.1 MT and PT inspection of welds

15.4.2 MT and PT inspection of castings

15.5 UT inspection

15.6 Additional inspection for ferritic materials

16. NDT INSPECTION REQUIREMENTS FOR FORCED DRAFT BLOWERS

16.1 General

16.2 Inspection requirements

16.3 Performing NDT inspection

16.3.2 Radiographic standard shooting sketches

16.4 Acceptance standards for NDT inspection

16.4.1 Radiography

16.4.2 MT and PT inspection of welds

16.4.3 MT and PT inspection of castings

16.5 UT inspection

16.6 Additional inspection for ferritic materials

17. NOTES

17.1 Cancelled specifications

Appendix

A Additional requirements for welding titanium and titanium alloys ix

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TABLES

TABLE PAGE

I. Grouping of base materials (welding)

II. Grouping of filler materials (welding)

III. Welding filler material chart

IV. Preheat and interpass temperature for welded ferrous alloys

V. Preheat and interpass temperature for welded nonferrous alloys

VI. Post heat requirements for welded ferrous alloys

VII. Approved weld joint designs

VIII. Class M machinery inspection requirements

IX. Class P piping inspection requirements

X. Class A pressure vessel inspection requirements

XI. Acceptance standards and classes

XII. Torque-tension minimum values (80 percent of yield strength)

XIII. Category 1. non-pressure containing castings in machinery or pressure vessels

XIV. Category 2. pressure containing castings - machinery or pressure vessel castings

XV. Category 3. pressure containing castings - piping system castings - valves, fittings, flanges and auxiliary equipment

XV.1. Nonferrous casting VT acceptance criteria

XVI. Acceptance criteria for MT and PT ........................................................................................112.2

XVII. RT acceptance criteria for aluminum castings

XVIII. RT acceptance criteria for steel (carbon alloy and corrosion resistant), titanium, and titanium alloy castings

XIX. RT acceptance criteria for nonferrous castings

XX. RT acceptance criteria for tin-bronze castings

XXI. NDT inspection of turbine parts

XXII. NDT inspection of propulsion reduction gear parts (including steam turbine driven auxiliary gears)

XXIII. NDT inspection requirements for forced draft blowers

FIGURES

FIGURE PAGE

1. Examples of acceptable weld joint locations

2. Maximum acceptable ultrasonic indication length for weld deposited buttering

3. Device for testing welded studs

4. Illustration of welded joint location

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FOREWORD

This manual covers the general requirements for fabrication welding and inspection, and casting inspection and repair for machinery, piping, and pressure vessels.

TMDER INSTRUCTIONS

Ships, training activities, supply points, depots, Naval Shipyards and Supervisors of Shipbuilding are requested to arrange for the maximum practical use and evaluation of NAVSEA and SPAWAR technical manuals (TMs). All errors, omissions, discrepancies, and suggestions for improvement to NAVSEA and SPAWAR TMs shall be submitted as a Technical

Manual Deficiency/Evaluation Report (TMDER). All feedback comments shall be thoroughly investigated and originators will be advised of action resulting there from.

The NAVSEA/SPAWAR Technical Manual Deficiency/Evaluation Report form, NAVSEA 4160/1, is included at the back of the TM.

Copies of form NAVSEA 4160/1 may also be downloaded from:

https://nsdsa.nmci.navy.mil/nsdsarepository/TMDER_BLANK_REV_9-2010-1.pdf

The following methods are available for generation and submission of TMDERs against unclassified TMs:

For those with a Technical Data Management Information System (TDMIS) account, the most expedient and preferred method of TMDER generation and submission is via the TDMIS website at:

https://mercury.tdmis.navy.mil.

For those without a TDMIS account, generate and submit TMDER via the Naval Systems Data Support Activity

(NSDSA) website at: https://mercury.tdmis.navy.mil/def_external/pubsearch.cfm. (TDMIS accounts may be requested at https://nsdsa.nmci.navy.mil.)

When internet access is not available, submit TMDER via hardcopy to:

COMMANDER

CODE 310 TMDERs

NAVSURFWARCENDIV NSDSA

4363 MISSILE WAY, BLDG 1389

PORT HUENEME, CA 93043-4307

TMDERs against classified/restricted (includes all NOFORN) TMs must be submitted using the hardcopy method cited above.

Urgent priority TM deficiencies shall be reported by Naval message with transmission to Port Hueneme Division, Naval Surface Warfare Center (Code 310), Port Hueneme, CA. Local message handling procedures shall be used.

The message shall identify each TM deficiency by TM identification number and title. This method shall be used in those instances where a TM deficiency constitutes an urgent problem, (i.e., involves a condition, which if not corrected, could result in injury to personnel, damage to the equipment, or jeopardy to the safety or success of the mission).

Complete instructions for TMDER generation and submission are detailed on the NSDSA website at:

https://nsdsa.nmci.navy.mil/tmder/tmder.asp?lvl=1.

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3.3.1.22 Straw (color). Straw is a color occurring on titanium welds from slight contamination whose hue ranges from light gold through brass.

3.3.2 Classification. The following classifications are applicable to this document:

(a) Machinery, class M.

(1) Class M-1. Class M-1 machinery includes welds in moving parts, such as gears, rotors, impellers and shafting (except propulsion shafting and rudder stocks) that transmit torque or thrust. Welding of propulsion shafting and rudder stocks shall conform to MIL-STD-2191.

(2) Class M-2. Class M-2 machinery includes welds in stationary non-pressurized assemblies or structures, such as sub-bases for turbines, engines, motors, and pumps.

Each of these sub-classes shall be further categorized as to criticality in accordance with the following:

a. Category A. Safety and mission of the ship.

Safety. Includes machinery forming part of, or directly supporting, watertight integrity or machinery the failure of which would cause loss of ship control, propulsion, or weight handling equipment.

Mission. Machinery essential to the mission of the ship, such as weapon and fire control systems, navigation communication systems, and major auxiliary support systems.

b. Category B. Normal operation of the ship. Machinery essential to the normal operation of the ship.

c. Category C. Non-essential items. Includes parts of components in categories A and B having welded joints that do not transmit the principal operating load or support any type of pressure boundary.

(b) Piping, class P. Class P piping includes all piping, tubing, and fittings for conveying fluids. Classes P-1, P-2, and P-LT apply to welded systems. Class P-3 applies to brazed systems.

(1) Class P-1. Class P-1 includes fabrication welds for design pressures exceeding 300 pounds per square inch (lb/in ) or design temperatures exceeding 650 degrees Fahrenheit (°F), or both, such as steam lines, hydraulic systems, boiler generating tubes, superheater and economizer elements, other pressure retaining tubes and piping (excluding nozzle or root connections to pressure vessels, which are covered under the appropriate classification), and all piping systems for conveying oxygen, gasoline, and lethal gases or liquids regardless of pressure and temperature. This class also includes fabrication welds

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Licensee=Naval Sea Systems Command/9991451100, User=Hence, Jason in piping systems which transmit oxygen, helium, mixed gases, air, water and exhaust of diving life support systems. Also included are any structural welds made to the internal or external surfaces of a fluid boundary subject to system pressure but which do not form a part of the fluid boundary. This includes any weld made to a weld deposited pad or cladding on the fluid boundary as well as the weld deposited pad or cladding beneath the weld itself. This does not include cladding other than cladding beneath the weld nor does it include welds which join clips, nameplates, insulation supports, or other nonstructural members to the fluid boundary. Specifically excluded are pipe joints meeting the classification criteria of class P-LT.

(2) Class P-2. Class P-2 includes fabrication welds for design pressures and design temperatures not exceeding 300 lb/in and 650 °F. Also included are fabrication welds in all open ended vent, drain and steam escape piping that has no isolation capability from its origin to its terminus regardless of the design temperature or pressure. Specifically excluded are pipe joints meeting the classification criteria of class P-LT.

(3) Class P-LT. Class P-LT includes fabrication welds for all piping of design pressures greater than 50 lb/in and service temperatures of minus 20 °F and below.

(4) Class P-3. Class P-3 piping includes all brazed piping of unlimited pressures and 425 °F maximum design temperature. Fabrication and inspection of brazed piping systems shall be in accordance with

NAVSEA 0900-LP-001-7000.

(c) Pressure vessels and tanks, class A. Class A pressure vessels and tanks include the fabrication welds for parts of drums, tanks, or closed receptacles (including nozzle attachments) and valves which are designed to contain gases or liquids. This includes all feed tanks, lubricating oil storage tanks, and similar vessels which contain only the static head of the obtained liquid. It does not include tubing or piping that joins to the pressure vessel, which are subject to the requirements of class P piping. Valves to be installed in class

P-1 piping system shall be fabricated and inspected in accordance with class A-2 pressure vessel requirements. Valves to be installed in other classes of piping systems shall be fabricated and inspected in accordance with the appropriate pressure vessel category as determined by design temperatures and pressures.

(1) Class A-F. Class A-F includes fabrication welds for fired and unfired pressure vessels for all pressures and temperatures that are specifically designed for a finite fatigue life and, as a consequence, are required to undergo low cycle fatigue evaluations. Also included are any structural welds made to the internal or external surfaces of a fluid boundary subject to system pressure but

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(a) Welds and surrounding 1/32 inch of material shall exhibit a bright, shiny, silvery luster. Other conditions are unacceptable and shall be dispositioned as follows: Loss of luster or colors other than straw (e.g., purple, blue, yellow, gray, etc.) shall require complete removal of the affected weld bead along with 1/16-inch minimum of surrounding material. Straw color on surfaces to be welded over shall be removed prior to further welding. Straw color does not require removal from final weld surfaces.

(b) For areas beyond 1/32 inch from the weld toes. All discoloration on surfaces to be welded over is unacceptable and shall be removed prior to further welding. Colors except for straw on other surfaces shall be removed. Removal may occur after completion of welding.

10.4.1.1 General. VT inspection shall be performed using a written procedure and qualified personnel in addition to the requirements of MIL-STD-271. VT inspection qualification and training shall be documented in a written procedure. VT inspection shall be accomplished without the use of magnifying glasses or other visual aids except for corrective aids to restore normal vision.

10.4.1.2 Welds. VT inspection of welds shall be performed after slag removal and with the weld in the final surface condition. For welds in S-51, S-52, and S-53 materials VT inspection for color (contamination) shall be in the as-welded condition before wire brushing or any other cleaning. After correction of unacceptable color condition, a final visual inspection for color shall be performed.

10.4.1.3 Base material. The surface to be inspected shall be in a clean condition. Surfaces which have been cleaned and painted with one coat of primer are considered suitable for inspection.

10.4.2 MT and PT inspection. Acceptance of welds and the adjacent base metal subjected to MT or PT inspection shall be in accordance with the standard and class requirements specified in table XI. Acceptance criteria for cladding or weld overlay shall be in accordance with the class specified for the weld application; however, where weld cladding is used to provide corrosion resistance for gasket seats or similar applications, the following acceptance criteria apply:

(1) O-ring or gasket seating surfaces plug 1/8 inch to either side of the designed gasket location or line of contact -- class 1.

(2) Other cladding normally subjected to liquid pressure -- class 2.

(3) Other cladding normally dry (for example, on the low pressure side of the gasket) -- class 3.

10.4.2.1 Adjacent casting base material. PT indications in casting base material adjacent to fabrication welds may be evaluated as follows:

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(1) Castings requiring PT inspection in accordance with the footnotes to the tables in section 12 may be evaluated to the applicable casting acceptance standard.

(2) Castings not requiring PT inspection in accordance with the footnotes to the tables in section 12 may be evaluated in accordance with 13.2.8.2.1.

10.4.3 Radiography. Radiographs for welds shall be compared with the standard for radiography and classes in accordance with table XI.

10.4.4 UT inspection. Acceptance of welds subjected to UT inspection shall be in accordance with the applicable standard and classes specified in table XI.

10.4.4.1 UT inspection of weld deposited buttering. Prior to UT inspection of the weld deposited buttering for defects and lack of bond, the test equipment shall be calibrated by using a calibration block which has been fabricated by buttering using the same process, filler metal, and base metal as the production part. (Equivalent S number base metal may be used. For this purpose, S-1, S-2, S-3, S-4, S-5, and S-11 material are considered equivalent.) Calibration block shall have equivalent weld thickness and surface finish as the production part and shall be sufficiently thick to accommodate the required calibration holes needed to establish the distance amplitude correction (DAC) curve.

10.4.4.1.1 Calibration for inspecting weld deposited buttering for both weld metal defects and lack of bond.

(a) Holes shall be drilled into the block as follows:

Either 1/8-inch diameter flat bottomed holes shall be drilled from the base metal side with their axes perpendicular to the sound beam entry surface or 1/16-inch diameter holes at least 1-1/2 inches long shall be drilled parallel to the sound beam entry surface. The holes shall be positioned so that the following test metal distances (TMD) from the sound beam entry surface to the nearest surface of a hole are obtained:

(1) Deposited thickness up to and including 1/2 inch:

1/16 inch TMD

(T/2) TMD ± 1/32 inch

(T) TMD ± 1/16 inch

Where T = Deposited thickness or 1/2 inch, whichever is less.

For deposits less than 7/16 inch thick, the T/2 TMD hole may be omitted.

(2) Deposited thickness (T) over 1/2 inch:

1/2 inch TMD

(T/2 inch + 1/4 inch) TMD ± 1/32 inch

(T) TMD + 1/16 inch

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5/ In event of conflict in NDT requirements between this table, the ship’s specifications, the component specification or other documents, the more stringent NDT requirements shall be invoked.

6/ RT of cast valve discs and balls is required only where such discs or balls form a part of the hull boundary and failure could permit direct flooding inside ship, except RT is not required for centrifugally cast balls.

7/ Castings of sizes less than 4 inches shall be RT inspected where their failure would result in the loss of propulsion power due to lack of cooling water necessitated by the closing of the hull and back-up valves in the main seawater system for the purpose of isolating defective castings.

8/ Refer to the applicable system or component specification for pressure test requirements. Pressure tests shall be conducted on uncoated castings.

9/ RT and MT/PT requirements do not apply to castings in open ended oxygen or hydrogen vents or drains that are located between the last isolation valve and the open end.

10/ RT is not required for holding bulkhead isolation valves 2-1/2 inches NPS and larger with design pressure of 300 through 3400 psi of nonpropulsion systems unless required by other requirements of this military document.

12.3 Inspection details.

12.3.1 General. Tables XIII, XIV, and XV summarize the inspection requirements for cast nonpressure and pressure containing castings based on application, service conditions, size, and in some cases, stress. “X” indicates that the specific NDT test is required for the application and conditions described by the applicable pertinent horizontal data.

12.3.2 Visual examination. Each casting shall be visually examined for conformance with specified dimensions and surface conditions. Identification markings shall be checked to assure accuracy.

12.3.2.1 Inspection qualification. Visual examination shall be performed by personnel who have successfully passed the vision test in accordance with MIL-STD-271.

12.3.3 NDT. NDT shall be conducted in accordance with MIL-STD-271. Except as specified in 12.3.2 castings described for applications listed in tables XIII, XIV, and XV regardless of material shall be inspected by the NDT method indicated. Where MT/PT is indicated, materials which are magnetic at ambient temperatures shall be inspected by MT; materials which are non-magnetic shall be inspected by PT.

12.3.4 Radiographic standard shooting sketches. Shooting sketches prepared in accordance with MIL-

STD-271 shall be provided to assist in interpretation of the applicable radiographics. Approval of the sketches is required.

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12.3.5 Substitution of tests. When RT is specified and the geometry of the castings is such that inspection by radiography is not meaningful or cannot be performed in accordance with MIL-STD-271, MT or PT, as app1icable, may be substituted when approved. PT may be substituted for MT when a casting surface location or condition is such that it is inaccessible for MT or may be injured or contaminated by the MT method. UT, in accordance with an approved written test procedure, may be substituted for RT when approved for the application.

12.4 Acceptance criteria.

12.4.1 Visual examination. Nonferrous casting surfaces shall be free from conditions specified in table XV.1 and other harmful or injurious defects. Ferrous castings shall meet the requirements of SP-55.

Table XV.1. Nonferrous casting VT acceptance criteria. 1/, 2/, 3/, 4/, 5/, 6/

A. Defect Type B. For all casting categories except those of column C; indications exceeding the sizes and other criteria below are rejectable.

C. For table XIII casting categories

D3 (except dynamically loaded castings) and D4, indications exceeding the sizes and other criteria below are rejectable. Does not apply to non-redundant weight handling castings or titanium castings which shall be per column B.

1. Cracks and Tears None allowed. None allowed.

2. Linear Indications (other than cracks and tears):

a. All linear indications, except cold shuts (e.g., wrinkles, folds, oxide seams, etc.). 7/

3/16" or 1/4T, whichever is less. All linear indications above 1/16" or 1/8T, whichever is less, shall be examined at 5X minimum magnification or explored by grinding to confirm the indications are not cracks, tears or cold shuts. All linear voids and inclusions shall not exceed non-linear criteria. 8/, 9/

1/4" or 1/3T, whichever is less. All linear indications above 1/16" or 1/8T, whichever is less, shall be examined at

5X minimum magnification or explored by grinding to confirm the indications are not cracks, tears or cold shuts. All linear voids and inclusions shall not exceed non-linear criteria. 8/, 9/

b. Cold shuts. 7/ 1/16" or 1/4T, whichever is less. 8/, 9/ 1/8" or 1/3T, whichever is less. 8/, 9/

3. Non-Linear Indications:

a. Voids such as gas holes, gas porosity and discrete shrinkage cavities.

3/32" or 1/4T, whichever is less, provided all internal surfaces of the indication are visible.

9/, 10/

3/16" or 1/3T, whichever is less, provided all internal surfaces of the indication are visible. 9/, 10/

b. Inclusions

3/32" or 1/4T, whichever is less. 9/, 10/

(1) For castings where T is less than

1.5" and all aluminum castings: 3/16" or 1/3T, whichever is less. 9/, 10/

(2) For castings (excluding aluminum) where T is 1.5" or greater: 5/16" or

1/8T, whichever is less. 9/, 10/

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Table XV.1. Nonferrous casting VT acceptance criteria. 1/, 2/, 3/, 4/, 5/, 6/ – Continued

A. Defect Type B. For all casting categories except those of column C; indications exceeding the sizes and other criteria below are rejectable.

C. For table XIII casting categories

D3 (except dynamically loaded castings) and D4, indications exceeding the sizes and other criteria below are rejectable. Does not apply to non-redundant weight handling castings or titanium castings which shall be per column B.

4. Tightly adherent sand, scale and other foreign material.

None allowed.

None allowed.

5. Raised metal surfaces having a jagged or irregular surface not addressed by drawing.

Surfaces shall be smoothly blended into surrounding surfaces.

Surfaces shall be smoothly blended into surrounding surfaces.

1/ Criteria apply to cast, rough ground or machined surfaces, except for critical machined surfaces. Critical machined surfaces are O-ring surfaces, gasket surfaces and other sealing surfaces, seating surfaces, threaded surfaces and surfaces within ½" from intended welds. Critical machined surfaces shall be free of all defects, including those otherwise permitted by Note 4/, unless the defect is within the other limits of this table and is approved by the Design Yard, Planning Yard or Authorized Representative, as applicable.

2/ A linear indication is an indication in which the length is equal to or greater than three times the width. A non -linear indication is an indication whose length is less than three times the width.

3/ T is the design casting thickness at the indication location. Indications, and excavations of indications not repair welded, shall not reduce casting thickness below the design thickness. Ground areas shall be smoothly blended.

4/ Linear indications with length less than or equal to 1/16" or 1/8T, whichever is less, and non-linear indications whose major dimension is less than or equal to 1/16" or 1/8T, whichever is less, do not require classification and are acceptable if acceptably separated (see Notes 8/ and 10/). Indications less than 0.015", regardless of proximity, do not require classification and are acceptable.

5/ Not applicable to high pressure die castings (e.g., ASTM B85). Criteria for high pressure die castings shall be proposed by the casting designer for approval by NAVSEA.

6/ Indications that are PT inspected and meet the acceptance criteria of table XVI are acceptable.

7/ A cold shut is an imperfect junction between two flows of metal in a mold caused by the surface of the streams of metal chilling too rapidly, or in effect, being chilled to the extent that fusion does not occur. This discontinuity may have the appearance of a crack or seam with smooth or rounded edges.

8/ Longitudinally aligned linear indications shall be separated by 4D where D is the length of the longer indication. Non-aligned linear indications shall be separated by 2D. There shall be no more than 10 linear indications in any 6" x 6" area. Smaller areas shall be prorated.

9/ If minimum indication separation is less than required, then where the total indication lengths (i.e., including separation between indications) are less than the maximum permissible indication size, the indications shall be acceptable.

10/ Random individual non-linear indications shall be separated by 2D where D is the maximum dimension of the larger indication. There shall be no more than 4 non-linear indications in any 2" x 2" area. Smaller areas shall be prorated.

--`,`,,````,`,```,,`,`,,``,,```,-`-`,,`,,`,`,,`--- Change A 112.1

No reproduction or networking permitted without license from IHS

12.4.2 MT, PT, and RT. Acceptance criteria for MT, PT, and RT shall be as specified in tables XVI, XVII, XVIII, XIX, and XX.

TABLE XVI. Acceptance criteria for MT and PT. 1/

Cast material Finished metal thickness MT PT

(Inches) MIL-STD-2035

FERROUS CASTINGS

Corrosion-resistant steel

Carbon steel

Alloy steels

Less than 1

1 to 3 over 3

Class 1

Class 2

Class 3

Class 1

Class 3

NONFERROUS CASTINGS

Nickel base alloys

Copper-nickel

Aluminum-bronze

Nickel-aluminum-bronze

Manganese-bronze

1 and less over 1

Tin-bronze 1/2 and less over 1/2

Class 2

Class 3

Aluminum --- --- Class 2

Titanium-titanium alloys Less than 1

1 to 3 over 3

Class 1

Note:

1/ It is characteristic of some castings to be subject to superficial surface craze cracking. MT or PT indications of such craze cracking shall not be prejudicial when they do not exceed 5/16 inch in length. Indications beyond this length shall require removal, except that such indications may be approved subject to technical evaluation for acceptability dependent on intended application service conditions.

Change A 112.2

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