Add to Alert PDF. Please first log in with a verified email before subscribing to alerts. Please first verify your email before subscribing to alerts.
Already Subscribed to this document. You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. PDF Price. Prices subject to change without notice. About Us. Contact Us. Sign In. Standards Store. Purchase History. Currency display settings. Manage society memberships.
Featured Products. View All Publishers. Quality Management. SCC Standards Store. Popular Standards Bundles. The load shall be steadily increased until the specimen fractures. The fractured surfaces shall be examined without magnification.
Specimens shall be extracted transversely to the weld, prepared, and etched to show weld cross-section and examined at a minimum of 5X magnification. Acceptance standards shall be as specified in 4. This section provides requirements for performance qualification data accumulation and maintenance of records. A sample is provided for guidance see figure The welder qualification test record shall include at least the following information:.
Requalification of welder or welding operator is required for the changes specified in 5. A change from one base material thickness to thickness outside the limits specified in table X and figures 12 and A change to a welding position other than one already qualified see table IX or a change in progression from vertical up to vertical down or vice versa.
For pipe welders when there is a change from a condition of no restriction on joint accessibility to a condition of restricted 12 inches and under accessibility and the existing qualification was made under no restriction over 12 inches.
Refer to figure 21 for layout and construction of restricted accessibility qualification test assembly positions. Welding to the requirements of a fabrication document shall require training and testing on the requirements of that document in accordance with 5.
This section contains the requirements necessary to qualify brazing procedures, brazers and brazing operators for applications other than piping and pressure vessels. The purpose of these qualification requirements is to ensure that qualified procedures are used with adequate equipment by properly trained personnel.
Each activity performing work within the scope of this document shall direct and supervise the necessary qualification tests. Upon completion of all qualification tests, each activity shall certify that the tests and test results meet all the requirements of this standard and shall maintain records of the qualification tests, as specified in 6. Approval of the required qualification test data shall be obtained from NAVSEA or its authorized representative as specified in this section.
Subject to approval, procedures, brazers, and brazing operators previously qualified to the requirements of prior issues of this document or to NAVSEA LP on which qualification records are still available, and qualifications have not lapsed, shall not require requalification. Welding, including brazing, may produce fumes and gases hazardous to health.
Avoid breathing these fumes and gases. Use adequate ventilation. All brazing procedures and instructions to brazers and brazing operators should carry this or a similar statement and appropriate safety measures should be taken o ensure that brazing is performed under optimum conditions of ventilation.
Before any brazing is performed, each activity shall accomplish the following:. Except as noted herein, procedure qualification tests are not required for manual torch brazing with base materials, brazing alloys and flux combinations specified by table XII. Qualification tests shall be performed for manual torch brazing procedures that specify materials not classified in table XII and for all other brazing processes including those listed in 6.
After testing, the responsible official of the activity shall certify that the tests and the test results meet all requirements of this standard. In as much as the activity is responsible for the quality of its work as well as that of its subcontractors, the activity shall submit qualification tests and data of its subcontractors only after careful review and verification of their completeness.
Qualification tests and data containing deviations from requirements may be submitted if such deviations are identified, and the technical justification for each deviation is provided. When brazing to the requirements of the American Society of Mechanical Engineers ASME code is specified or approved, the specific component or system specifications or approval letter shall be identified.
Procedure qualification previously prepared for other Government agencies, American Bureau of Shipping ABS , American Society of Mechanical Engineers ASME , or other established regulatory codes may be used provided qualification testing and approval by the other Government agencies or regulatory bodies occurred prior to the activity's invitation for bid or request for proposal.
It is the intent of this provision that certified qualification data acquired by these agencies be considered acceptable proof of qualification. Such data shall be submitted for approval as requested in 6. When qualification testing is required, the activity shall submit the essential elements of the brazing procedure and detail qualification test results to NAVSEA or its authorized representative for approval in accordance with the appendix.
Procedures are the activity's responsibility but shall be submitted for information. Resubmission of procedures for changes which do not involve requalification is not required. Brazing procedure submittal does not mitigate the performing activity's responsibility for conformance with the requirements of this document. In addition to the general requirements covered by the Data Item Description of the appendix, the following requirements shall also apply.
The brazing procedure qualification test report shall be in accordance with 6. The brazing procedure shall be in accordance with 6. The procedure qualification test report shall include the essential elements of the brazing procedure as specified in 6. Each qualifying activity shall retain the pertinent qualification test data, destructive test specimens and nondestructive test result reports until written approval of the qualification data is obtained.
It shall be the responsibility of each activity to assure that its sub-contractors comply with the qualification provisions of this document. The brazing procedure shall include the following essential elements as applicable:. The brazing procedure shall be qualified where required by 6. The size of each test assembly shall be sufficient to permit removal of the required test specimens. The method used in brazing the qualification test assemblies shall be in accordance with proposed brazing procedure.
No repair of test joints is permitted. Qualification shall be obtained for the position to be used in production, except qualification in either the flat-flow, vertical-up flow or horizontal-flow position shall also qualify the vertical-down flow position. Material thickness limits are shown in table XV. Butt or scarf joints shall qualify for lap joints and vice versa. Type and number of tests shall be as specified in table XV. Reduced specimens conforming to figure 19 shall be used for tension tests, The stress shall be computed by dividing the ultimate load of the nominal total cross sectional area of the thinnest member comprising the joint.
The tension specimen shall have as a minimum a tensile strength that is not less than:. The peel test specimen shall conform to figure The peel specimen shall show evidence of brazing alloy along each edge. Specimens shall be separated or peeled either by clamping "section A" and striking the fulcrum point with a suitable tool or by clamping "section A" and "section B" in a machine suitable for separating the sections under tension.
The separated faying surfaces of joints shall meet the following criteria:. Brazements shall be limited to visual examination without magnification to the following acceptance standards:. Braze filler metal in excess of that required by c is acceptable provided the excess alloy does not interfere with the function of the completed assembly.
Visual evidence of residual flux is not permitted on the surface of a completed joint. A revised brazing procedure shall be prepared and the procedure requalified when any of the changes specified in 6.
Changes other than those specified in 6. Requalification is not required when the base material P-numbers have been qualified for brazing in a dissimilar base material joint. A similar base material joint is one in which both base materials are in the same P-number group. A change from a brazing alloy classified under one P-number in table XIV to a brazing alloy classified under another F-number, or to a brazing alloy not classified in table XIV, except that grade IV may be used in repairing by manual torch or induction brazing Joints which were brazed with a brazing alloy of a different F-number, without requalification of the procedure.
A change from one brazing process listed in 6. A change in the furnace atmosphere from one basic type to another basic type. When this standard is specified by the applicable fabrication document, each activity shall establish that each brazer and brazing operator to be employed for brazing has been qualified by demonstrating his ability to produce sound and satisfactory joints in accordance with this section. As a prerequisite to performance qualification, each activity shall have procedures qualified in accordance with this section for all applications for which performance qualification is intended.
Although it is essential that the brazer be cognizant of the contents of the procedure being used for qualification, this requirement shall not be interpreted to mean that the performance qualification must be accomplished in accordance with the qualified procedure. To assure this knowledge, each brazer and brazing operator shall be trained and tested in accordance with a program meeting the requirements of 6.
A copy of the procedure shall be provided to the authorized agent for approval. As an alternative to 6. Permission to use this method of establishing performance qualification must be obtained for each brazer and brazing operator from the authorized representative prior to start of the individual's production work. Government agencies, American Bureau of Shipping, or ASME, within the limits covered by the qualification tests passed, provided evidence of qualification is verified and approved.
Transfer of performance qualification from one activity to another is not permitted without specific approval by the authorized representative,. Each joint when peeled or ultrasonically tested shall show bonding on at least 70 percent of the lapped area.
Qualification with any one base material, any one flux and any one brazing alloy qualifies for all combinations listed in table XII for a given process. Brazing to the requirements ok a fabrication document shall require training and testing on the requirements of that document in accordance with 6. If a performance qualification test assembly fails to meet the applicable requirements, a retest may be allowed under the following conditions:.
Each activity shall establish that an active qualification status is maintained for each qualified brazer or brazing operator. Evidence consisting of at least one verification of process use that is, fabricator certification of use of "manual torch brazing", or "induction brazing" at any time during each 3-month or calendar-quarter period, shall be maintained.
The intent of this requirement is to cause verification of each production brazer's or brazing operator's use of the qualified processes once in each calendar-quarter subsequent to the quarter in which he was qualified and four times in each subsequent calendar year.
Renewal of performance qualification is required 1 when a brazer or brazing operator has not used the specific brazing process in the preceding calendar quarter, or 2 when the authorized representative has specific reason to question the ability of a brazer or brazing operator to make brazed joints that meet the specification requirements.
Renewal of qualification under 1 need be made on only a single test assembly in any position and where requirements of 6. Requalification of brazers and brazing operators is required for any of the following changes or conditions.
A change to a base material not listed in table XIII except as permitted by note 1 thereto. A change to a brazing alloy not listed in table XIV except as permitted by note 1 thereto. Qualification test records of each brazer or brazing operator, together with identification data, shall be kept by the activity.
These records shall include the following information:. Each brazer or brazing operator shall be required to pass an annual vision test. The standard of acceptance for vision tests shall be natural or corrected near distance acuity such that the individual is capable of reading J1 letters on the standard Jaeger type chart for near vision. Other equivalent visual tests such as Snellen chart may be substituted for the Jaeger chart. Machine welding, automatic Machine welding, manual Machine welding, semi-automatic Procedure, brazing Procedure, welding.
Asterisks are not used in this revision to identify changes with respect to the previous issue due to the extensiveness of the changes.
See footnotes at end of table. Other flux-wire combinations shall require separate procedure qualification tests. A neutral flux is defined as being one that does not readily oxidize the alloying elements or add significant alloy to the weld. When any one of these base materials are welded in a quenched and tempered condition, separate qualification is required.
However, qualification using any one of these materials in the quenched and tempered condition shall also qualify for welding all of the materials in the S-group in the annealed or normalized and tempered condition.
For this purpose S-3A is higher than S Welding procedure qualification position limitation. However, only non-destructive testing as specified for level no. II qualification shall be required for the horizontal plate and the vertical-fixed position pipe.
Qualification in the horizontal, vertical, or overhead position shall qualify also for the flat position. Qualification in the horizontal fixed position, 5G, shall qualify for the flat, vertical, and overhead positions.
Qualification in the horizontal, vertical, and overhead positions shall qualify for all positions. Qualification in the inclined fixed position, 6G, shall qualify for all positions. Such qualifications are valid only for the position actually tested, except that an angular deviation of plus or minus 15 degrees is permitted in the inclination of the weld axis and the rotation of the weld face. For automatic pipe welding, the setting for each pipe size to be welded in production shall be required.
The welding procedure shall specify this restriction for each specific material affected. Combination limits of amperage, voltage and travel speed shall be specified for the ranges of each parameter. Equivalent means of limiting heat input for example, nomographs or for shielded metal-arc, bead length methods are permissible. Simple reference to a formula is unacceptable. Welding procedure qualification material thickness limits. When qualifying plate using pipe test assemblies, the test material thickness and qualified thickness limits specified for plate shall govern.
For clarification, the thickness limits T are as follows: a Butt joint: T is the nominal thickness of the pipe or plate.
For materials of different thicknesses, T is the nominal thickness of the thinner member. If the weld from the second side overlaps that of the first side, T is the thickness of the web member or the butt joint member.
For socket and fillet seal weld qualifications performed on pipe with wall thickness in the range of 0. For multiple processes the qualified thickness of each process shall not be additive in determining the maximum thickness of the production joint to be welded. One or more processes may be deleted from a production joint qualified by a combination of processes provided each remaining process has been qualified within the limits specified by 4.
Similarly, more than one process may be used in a single production joint provided each process has been qualified either separately or in combination with other processes. A change in sequence of the processes used does not require requalification. Welding procedure qualification assembly test requirements. When more than one set of specimens for the weld metal is required each set shall represent a different weld depth level with one set taken from the test assembly midthickness.
When double beveled butt weld test assemblies are employed, weld metal impact specimens shall be removed from each side of the joint that is, at least two specimens from each side.
Specimens shall be prepared as specified below:. Minimum Minimum sets of specimens no. Weld HAZ B. If the procedure is for full penetration pipe butt joints welded from one side without backing rings or preplaced inserts, root bends with the root surface in the as welded condition that is, no machining, grinding, and so forth are required when the root is welded without the addition of filler metal or without internal inert gas purge.
Chemical testing for corrosion-resistance shall be performed only when specified in the applicable fabrication document. If the procedure is for full penetration pipe butt joints welded from one side without backing rings or preplaced inserts, root bends with the root surface in the as welded condition that is, no machining, grinding, and so forth are required in addition to the macro-etch specimens when the root is welded without the addition of filler metal or without internal inert gas purge.
Grouping of filler metals and process combinations for welder or welding operator performance qualification. See 5. Welding vertical down shall require a separate qualification test see 4. Also, performance qualification can be accomplished on thicknesses 0. The minimum thickness shall be 10 percent below the nominal pipe wall thickness welded for socket and fillet seal weld qualifications performed with manual or semiautomatic processes on pipe with wall thickness in the range 0.
Qualifications for welding the root only or root plus one layer are not subject to the thickness limitations of this table. Maximum plate thickness qualified with joint-B will depend on accessibility of plasma arc torch into weld groove. For titanium and titanium alloy welds see 5.
Radiography of plates shall be the entire length, except that 1 inch on each end of the weld will not be evaluated. When joint is welded without addition of filler metal or without internal purge, root bends as described in note 7 are also required. Groupings of brazing alloys for procedure and performance qualification.
Type and number of test specimens required and range of thickness qualified brazing procedure qualification. Such calculations shall be submitted with the procedure qualification data.
Deliverable data required by this standard are cited in the following paragraphs. Data item descriptions related to this standard, and identified in section 6 will be approved and listed as such in DoD Copies of data item descriptions required by the contractors in connection with specific acquisition functions should be obtained from the Naval Publications and Forms Center or as directed by the contracting officer.
The library is funded using revenue from the engineering service side of Abbott Aerospace and by the donations of the people who find the library useful.
What should I do if I think I see a copyright violation in any of the library materials? Please contact us immediately and give us specific information about your concern. What should I do if I think I find an error in any of the library materials? Please let us know immediately. I would like to help the library by volunteering my time.
How do I do that? At the present time we are unable to accept any offers of help.
0コメント