1、Designation: A 1015 01 (Reapproved 2005)Standard Guide forVideoborescoping of Tubular Products for SanitaryApplications1This standard is issued under the fixed designation A 1015; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the
2、 year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This standard covers guidelines for ordering and exam-ining tubular products for sanitary applications by vi
3、deobore-scoping. This method uses movable camera probe at the end ofa cable to examine the interior of a tubular product. The imageis then transmitted to an external monitor for analysis. Themethod is normally used when inside surface imperfections,not normally detected by other nondestructive metho
4、ds, mayresult in contamination of the product which is contained bythe tubular product.2. Referenced Documents2.1 ASTM Standards:2A 941 Terminology Relating to Steel, Stainless Steel, Re-lated Alloys, and Ferroalloys3. Terminology3.1 Definitions:3.1.1 For definition of some of the terms used in this
5、specification, refer to Specification A 941.3.2 Other Definitions:3.2.1 collara device which fits around the probe tip tocontrol distance from the product surface and angle of viewingto ensure a consistent magnification factor.3.3 Definitions of Terms Specific to This Standard:3.3.1 inclusiona nonme
6、tallic particle embedded in theproduct surface.3.3.2 nicka surface imperfection resulting from materialremoval or compression usually caused by a mechanicalmeans. It usually has a length to width ratio less than 5.3.3.3 oxidea darker, non-reflective area that is the resultof improper protective gas
7、coverage during a high temperatureoperation or insufficient chemical cleaning.3.3.4 pita sharp edged surface depression usually causedby the removal of an embedded particle but may also be causedby selective metal removal by a chemical means.3.3.5 shrinkagea line of irregular shallow pores whichoccu
8、r along the center of a weld.3.3.6 scratcha long depression cause by a mechanicalmeans. It usually has a length-to-width ratio greater than 5.3.3.7 slag pocketa pit, usually in a weld, caused by aparticle of slag (metal oxides, carbides, fluorides or similar)which may have been cold worked into the
9、surface. The pocketmay or may not still contain slag during the examination.3.3.8 starbursta series of slag pockets where the centerone is usually the largest and smaller ones radiate outward.3.3.9 tubea generic term for all tubular products includingboth pipe and tube.4. Ordering Information4.1 It
10、is the responsibility of the purchaser to specify all ofthe requirements that are desired under this specification. Suchrequirements may include, but are not limited to, the following:4.1.1 Number of tubes to be inspected.4.1.2 The amount of probe to tube rotation, if desired(Section 8).4.1.3 Any sp
11、ecial probe coverage (Section 8).4.1.4 Special probe feed rates (Section 8).4.1.5 Any special acceptance criteria (Section 6).4.1.6 Supply of recording tapes and whether traceability isrequired (Section 9).4.1.7 Information to be identified on recording tapes (Sec-tion 9).4.1.8 Whether customer witn
12、essing is required (Section 10).4.1.9 Whether Certification is required (Section 11).5. Significance and Use5.1 This specification establishes some the key factorswhich govern the interpretation of videoborescoping tubularproducts for a specific application. It is recognized that therequirements for
13、 one application may be very different thanthose of another. Therefore, the specification allows for theinspection to be customized for the application by the user byallowing the purchaser to specify parameters which may beimportant for the application.1This guide is under the jurisdiction of ASTM C
14、ommittee A01 on Steel,Stainless Steel, and Related Alloys and is the direct responsibility of SubcommitteeA01.10 on Stainless and Alloy Steel Tubular Products.Current edition approved Sept. 1, 2005. Published October 2005. Originallyapproved in 2001. Last previous edition approved in 2001 as A 1015
15、01.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO B
16、ox C700, West Conshohocken, PA 19428-2959, United States.6. Acceptance Criteria6.1 The purpose of this inspection is to identify imperfec-tions on the ID surface of the tube which may be detrimentalto the end use. These imperfections could have a variety ofshapes, sizes and causes which may or may n
17、ot have impact onthe final use. The criteria should include a reference to thetypes of imperfections which are considered detrimental. Thesemay include, but are not limited to, the following:6.1.1 Nicks,6.1.2 Scratches or other linear imperfections,6.1.3 Pits,6.1.4 Inclusions,6.1.5 Slag pockets,6.1.
18、6 Starbursts,6.1.7 Shrinkage,6.1.8 Oxide,6.1.9 Other weld imperfections.6.2 Each imperfection shall be ranked by size. The criteriashould include a listing of how many imperfections of a typeand size are allowed per tube. It may include a listing whichallows more, smaller imperfections of a type or
19、fewer largeones. It may also include a maximum size which is allowed.The criteria may also define whether imperfections maycontain deposits or not.6.2.1 When properly calibrated, the length and width of theimperfection can be determined.6.2.2 Imperfection depth is difficult to determine by thistechn
20、ique. When depth is a necessary part of the criteria, arepresentative sample should be agreed upon by the purchaserand supplier based upon the video image. This sample can thenbe sectioned and the depth measured by an alternative method.6.3 Unless otherwise specified by the purchaser, the produc-ers
21、 published acceptance criteria shall be used. When nocriteria exists, the acceptance criteria shall be negotiated priorto the start of testing.7. Calibration7.1 When imperfection sizing is part of the criteria, thevideoborescope shall be calibrated prior to the examination.The following items affect
22、 sizing of imperfections for aparticular unit:7.1.1 Probe to surface distance. As the distance from theprobe tip to the examined surface decreases, the magnificationfactor increases.7.1.1.1 This distance shall be carefully controlled. This canbe accomplished by fitting a collar to the tip of the pro
23、be whichfits snugly into the inside diameter of the tube. The collar shallalso have enough clearance to slide freely inside of the tubeand be made of a material which will not cause additionalunacceptable imperfections on the ID surface. The collar shallhave sufficient length to prevent rocking of t
24、he probe whichmay hinder defect sizing.7.1.2 Probe type,7.1.3 Probe lens,7.1.4 Display CRT. As the display screen increases, so doesthe magnification.7.2 If any of the above four items, or any other factor whichmay affect magnification, is changed, the unit shall be recali-brated.7.3 Calibration sha
25、ll be performed using standards traceableto known National Standards, where they exist. Precision steelscales with .020” (0.5 mm) or liner graduations may be usedfor this calibration providing that the spacing between theprobe tip and scale is controlled to be the same as probe tip andexamined surfa
26、ce distance.8. Method of Scanning8.1 The method and coverage of scanning, and care shall berelated to the criticality of the application (See Notes 1-3).NOTE 1Scanning is usually considered as a sampling technique as theinside surface coverage is often less than 100 %. As the amount of surfacearea p
27、er tube to be scanned increases, so does the potential for detectingan increasing number of imperfections. Therefore, as the amount ofinspected surface area increases, so should the number of imperfections inthe acceptance criteria for a tube of the same quality level.NOTE 2The videoborescoping tech
28、nique is considered to be a rela-tively slow and expensive examination method. When deciding upon ascanning coverage and rate, the purchaser should recognize than highercoverages and slower path rates can increase the time of examination. Thiscan have a significant impact on the overall time to perf
29、orm the task andincrease the cost. The purchaser should consider this when deciding uponthese items.NOTE 3When surface finish may be critical to an application, such asthose which use an electropolished finish, The user needs to choosecoatings for the probe which do not damage the surface during the
30、examination.8.1.1 When a welded product is examined, unless otherwisespecified by the purchaser, the examination shall be along theweld seam only.8.1.2 The purchaser may specify if the examination path islinear or helical.8.1.3 When desired, the purchaser may specify the maxi-mum scanning rate which
31、 may be used. This is usuallyexpressed as a tubular length per minute.9. Recordings9.1 When specified by the purchaser, recordings shall bemade of the tube inspection. These are usually in the standardVHS format. The purchaser may specify if the recordings areto be from every tube or per a sample pl
32、an.9.2 When traceability between tube and recording is re-quired, the supplier shall provide a method to identify eachtube to the recording. If special information is to be identifiedon these recordings, the purchaser shall include this in thepurchase order.9.3 If defect sizing is utilized for accep
33、tance of the tube, thesupplier shall identify the size of the video monitor used duringthe inspection.10. Inspection10.1 The inspector representing the purchaser shall haveentry, at all times, to those areas where the inspection is beingperformed. The supplier shall afford the inspector all reason-a
34、ble facilities to satisfy him that the material is being examinedA 1015 01 (2005)2in accordance with this specification. The inspection shall beconducted so as not to interfere unnecessarily with the exami-nation.11. Certification11.1 When required by the purchaser, the supplier shallfurnish a state
35、ment that the material has been examined and hasmet all of the requirements of this specification and thecustomer purchase order.12. Keywords12.1 pipe; tube; tubular product; videoborescopingASTM International takes no position respecting the validity of any patent rights asserted in connection with
36、 any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible techni
37、cal committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideratio
38、n at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harb
39、or Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).A 1015 01 (2005)3
