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ISO 12094-1994 压力焊接钢管--制造焊接钢管用检测带材、条材层间缺陷的超声波检验ISO120941994标准是关于压力焊接钢管制造过程中，用于检测带材和条材层间缺陷的超声波检验方法的技术规范。该标准为确保焊接钢管的质量提供了重要的指导，特别是在原材料阶段通过无损检测技术发现潜在缺陷。
标准简介
ISO120941994的核心内容是规定了使用超声波技术检测带材和条材层间缺陷的方法和要求。这些材料通常用于制造压力焊接钢管，因此其质量直接影响最终产品的安全性与可靠性。标准中详细描述了超声波检测的基本原理、设备要求、操作流程以及结果评估方法。
#超声波检测原理超声波检测是一种非破坏性检测技术，通过高频声波在材料中的传播特性来识别内部缺陷。当超声波遇到材料内部的不连续（如分层、裂纹等）时，会产生反射或散射信号。通过分析这些信号的强度、时间和频率特征，可以判断缺陷的位置、大小和性质。
#检测对象该标准主要针对用于制造压力焊接钢管的带材和条材，特别是那些可能在轧制或热处理过程中形成的层间缺陷。这些缺陷如果未被及时发现并处理广州老干部服务处围墙重建及加固工程施工方案，可能会在后续的焊接和使用过程中导致钢管失效。
#检测设备标准对超声波检测设备提出了具体要求，包括探头频率、灵敏度、分辨率和动态范围等参数。为了确保检测结果的准确性，设备需要经过校准，并根据材料厚度和检测需求选择合适的探头类型。
#操作流程标准详细规定了超声波检测的操作步骤，包括：1.样品准备：确保带材和条材表面清洁，无影响检测结果的杂质或氧化物。2.参数设置：根据材料厚度和预期缺陷类型调整超声波设备参数。3.扫描方式：采用适当的扫描路径覆盖整个检测区域。4.信号分析：记录和分析反射信号，判断是否存在层间缺陷。5.结果评估：根据标准规定的验收准则，确定材料是否合格。
应用意义ISO120941994在压力焊接钢管制造领域具有重要意义。通过在原材料阶段实施严格的超声波检测，可以有效减少因层间缺陷导致的产品失效风险，从而提高钢管的安全性和使用寿命。同时，该标准也为制造商提供了一套统一的检测规范，促进了国际间的质量和贸易标准化。
总之，ISO120941994是压力焊接钢管制造行业中不可或缺的技术依据，为确保产品安全和性能提供了可靠的保障。
Equipmentcalibrationandchecking
7.1 Theequipmentshallbecalibratedstaticallyus ingeitherelectronicmeansinaccordancewith7.1.1 orareferencestandardinaccordancewith7.1.2
7.1.1Calibrationusinganelectronictechnique
7.1.2Calibrationusingareferencestandard
nderstatic conditions,with the transduceroreac ansducerinturncentrallylocatedoverthereferen
[SO 12094:1994(E)
7.2Duringtheproductiontestingofthe strips/platestherelativetranslationalspeeds,together withtheequipmentpulserepetitionfrequency.shall bechosensuchthattherelevantminimumcoverage andmaximumseparationbetweenadjacentscanning tracksqivenintable1willbeobtained.
7.3Thecalibrationoftheequipmentshallbe checkedatregularintervals during the production testingofstrips/platesof thesamethicknessand grade.
7.4 Theequipmentshallberecalibratedfollowing anysystem adjustmentsorwheneverthespecified nominalstrip/plate thicknessor gradeof steel S changed
7.5If,oncheckingduringproduction testing.the calibrationrequirementsarenotsatisfied,evenafter increasingthetestsensitivityby3dBtoallowfor system drift,thenall strips/platestestedsincethe previouscheckshallberetestedaftertheequipment hasbeenrecalibrated.
Retestingshallnotbenecessaryevenafteradropin testsensitivityofmorethan3dBsince theprevious calibration,providedthat suitablerecordings fromin dividuallyidentifiablestrip/plateareavailablewhich permit accurateclassificationinto suspectandac ceptablecategories.
8.1Anystrip/platenotproducingatrigger/alarm conditionshallbedeemedtohavepassedthistest.
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b Thesurfaceareashallbecroppedoff.Themanu facturershallensure to thesatisfactionofthe purchaser thatall the suspect areahasbeenre moved. 2 Thestrip/plate shallbedeemednot tohave passedthetest.
Whenspecifiedthemanufacturershallsubmittothe purchaseratestreportthatincludesatleast,thef lowinginformation:
Whenspecified,themanufacturershallsubmittothe purchasera testreport thatincludes,atleast,thefol lowinginformation:
b) dateof test; C) acceptance level; d)statementofconformity
materialdesignationbygradeandsize:
typeanddetailsofinspectiontechnique
ftypeanddetailsofinspection techniqu
4851903 0582349 525
[SO 12094:1994(E)
H descriptionofthereferencestandard,whenused n
ereferencestandard,whenused
1)Forthepurposeofdeterminingtheextentofthelaminatedsuspectarea,adjacentsuspectareasseparate thesmallerofthetwominoraxesof thelaminationsshallbeconsideredasone lamination. 2)Onlylaminarimperfectionsexceeding6mminwidtharetobeconsidered.
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[SO 12094:1994(E)
48519030582350247
db11t 1068-2022 下凹桥区雨水调蓄排放设计标准ProcedureforthedeterminationofthesizeofTaminarimperfectionsby
In casesof arbitration,i.e.dispute,between the manufacturerandthepurchaserorhisrepresentative, intheassessmentoftheextentandfrequencyof detected laminarimperfections,this procedure shall beused. Thisprocedure determinesthedetailsofthe sizing methodto establish the extentandfrequencyof laminarimperfectionsinsteelstrips/plates.
A.2Testingprocedure
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sionsisdefinedastheareaofthelaminar imperfections.
A3Surface condition
横岭污水处理厂配套干管2期工程1标段深基坑施工方案Thesurfaceofthestrip/plateshallbesufficientlyfree fromforeignmatterwhichwouldinterferewiththe validityofthetest.