{"id":465099,"date":"2024-10-20T10:38:42","date_gmt":"2024-10-20T10:38:42","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-iso-180812024\/"},"modified":"2024-10-26T19:38:38","modified_gmt":"2024-10-26T19:38:38","slug":"bs-en-iso-180812024","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-iso-180812024\/","title":{"rendered":"BS EN ISO 18081:2024"},"content":{"rendered":"

This document specifies the general principles required for leak detection by acoustic emission testing (AT). It is addressed to the application of the methodology on structures and components, where a leak flow as a result of pressure differences appears and generates acoustic emission (AE). It describes phenomena of the AE generation and influence of the nature of fluids, shape of the gap, wave propagation and environment. The different application techniques, instrumentation and presentation of AE results are discussed. Also included are guidelines for the preparation of application documents which describe specific requirements for the application of the acoustic emission testing. Annex A gives procedures for some leak-testing applications.<\/p>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
2<\/td>\nundefined <\/td>\n<\/tr>\n
4<\/td>\nEuropean foreword
Endorsement notice <\/td>\n<\/tr>\n
7<\/td>\nForeword <\/td>\n<\/tr>\n
9<\/td>\n1 Scope
2 Normative references
3 Terms and definitions <\/td>\n<\/tr>\n
10<\/td>\n4 Qualification of test personnel
5 Principle of acoustic emission testing
5.1 The acoustic emission phenomenon
5.2 Influence of different media and different phases <\/td>\n<\/tr>\n
11<\/td>\n5.3 Influence of pressure differences <\/td>\n<\/tr>\n
12<\/td>\n5.4 Influence of geometry of the leak path
5.5 Influence of wave propagation <\/td>\n<\/tr>\n
13<\/td>\n6 Applications
7 Testing equipment
7.1 General requirements
7.2 Sensors
7.2.1 Typical frequency ranges (band widths) <\/td>\n<\/tr>\n
14<\/td>\n7.2.2 Mounting technique
7.2.3 Temperature range, wave guide
7.2.4 Intrinsic safety
7.2.5 Immersed sensors
7.2.6 Integral electronics (amplifier, RMS converter, ASL converter, band pass) <\/td>\n<\/tr>\n
15<\/td>\n7.3 Portable and non-portable AE instruments
7.4 Single and multi-channel AT instruments
7.4.1 Single-channel instruments
7.4.2 Multi-channel instruments
7.5 Determination of features (RMS, ASL vs. hit or continuous AE vs. burst AE)
7.6 System verification using artificial leak noise sources <\/td>\n<\/tr>\n
16<\/td>\n8 Test procedure for leak detection
8.1 Mounting of sensors <\/td>\n<\/tr>\n
17<\/td>\n8.2 Additional features to be determined
8.3 Background noise
8.3.1 General
8.3.2 Environmental noise
8.3.3 Process noise
8.4 Data acquisition <\/td>\n<\/tr>\n
18<\/td>\n9 Location procedures
9.1 General
9.2 Single-sensor location based on AE wave attenuation <\/td>\n<\/tr>\n
19<\/td>\n9.3 Multi-sensor location based on \u0394t values (linear, planar)
9.3.1 Threshold level and peak level timing technique
9.3.2 Cross-correlation technique <\/td>\n<\/tr>\n
20<\/td>\n10 Data presentation
10.1 Numerical data presentation (level meter)
10.2 Parametric dependent function <\/td>\n<\/tr>\n
21<\/td>\n10.3 Frequency spectrum
11 Data interpretation
11.1 Leak validation
11.1.1 On-site (during test) and off-site (post analysis)
11.1.2 Correlation with pressure
11.1.3 Rejection of false indications <\/td>\n<\/tr>\n
22<\/td>\n11.2 Leakage rate estimation
11.3 Demand for follow-up actions <\/td>\n<\/tr>\n
23<\/td>\n12 Quality management documents
12.1 Test procedure
12.2 Test instruction <\/td>\n<\/tr>\n
24<\/td>\n13 Test documentation and reporting
13.1 Test documentation
13.2 Test report <\/td>\n<\/tr>\n
26<\/td>\nAnnex A (informative) Example applications of leak detection <\/td>\n<\/tr>\n
39<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Non-destructive testing. Acoustic emission testing (AT). Leak detection by means of acoustic emission<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2024<\/td>\n40<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":465108,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-465099","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-bsi","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/465099","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/465108"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=465099"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=465099"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=465099"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}