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Flanges-LS-021-270

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  Issue  09.2002   Linde EngineeringDivision Technical Purchase Specification     LINDE STANDARD  Orig.: TAW/Walter Checked: TAW/Dr.Gan;SL/Schumm Appr.: TAW-N/Gaebel Total 4  Pages LS-Class: BMDescriptors: Flange, TPS, Steel Casting, Heat-ResistingReplacesIssue 05.96                   3.1Chemical Composition...................................................23.2Mechanical Properties...................................................23.3Internal Condition...........................................................23.4Surface Requirements, Dimensional Tolerances..........23.5Weld Repairs (Production Welds)..................................33.6Testing/Examination......................................................33.7Marking..........................................................................43.8Inspection.......................................................................43.9Cleaning, Packaging, Transportation and Storage........4     This Technical Purchase Specification (TPS) shall apply to the delivery of centrifugally or statically castcollars and loose flanges of heat-resisting steel casting for process furnaces.Statements made in the purchase order shall have priority over the requirements of this TPS.      Besides the codes, standards and drawings specified in the purchase order the following documents shall beapplied within their scope of application. The issues valid as per date of placement of order shall be takenas basis:German/European StandardsEN 1370Founding - Surface Roughness Inspection by Visualtactile ComparatorsEN 1371-1Founding - Liquid Penetrant InspectionEN 1559 Part 1 and 2Founding - Technical Conditions of Deliverypr EN 12681Founding - Radiographic InspectionISO 8062Castings - System of dimensional tolerances and machining allowancesor (alternatively) US-CodesASME VIII/1 App. 8 Methods for Liquid Penetrant ExaminationASTM E 446Standard Reference Radiographs for Steel CastingsASTM A 351Standard Specifications for CastingsASTM A 802Standard Practice for Steel Castings, Surface Accept. Standards, Visual Examinationas well as the Linde StandardLS 001-02Inspection Documents    Linde AG - Linde Engineering Division Issue 09.2002LS 021-270 Page 2       Requirements according to Table 1.       % by weightElement 3) G-X40NiCrNb35-25W.Nr.1.4852G-X10NiCrNb32-20W.Nr.1.4859 1) G-X50CrNi30-30M.Nr.1.4868C0,35 - 0,450,05 - 0,150,50 – 0,60Si1,2 - 2,2, 2) 0,5 - 1,52,00 – 2,50, 2) Mn0,5 - 1,50,5 - 1,5  ≤  1,25Cr24,0 - 27,019,0 - 21,029,0 – 31,0Ni33,0 - 35,031,0 - 33,029,0 – 31,0Nb0,8 - 1,50,5 - 1,5-Al  ≤  0,10  ≤  0,10  ≤  0,10Mo  ≤  0,5-  ≤  0,5Cu  ≤  0,2  ≤  0,2  ≤  0,2P, S  ≤  0,03  ≤  0,03  ≤  0,03Ace, Sn, Zn,Sb, Pb ≤  0,005  ≤  0,005  ≤  0,0051) Equivalent grade CT 15 C acc. to ASTM A 3512) For centrifugal casting ≥  1,8 %3) Foreign scrap must not be used. Bi- and Te-content of max. 0,005 %, checked at manufacturer'sapproval.    Requirements according to Table 2. The creep rupture strengths to be guaranteed (Rm ≥  100000 h) andtheir method of determination shall be submitted to the purchaser upon request.        Mechanical PropertiesG-X40NiCrNb35-25W.Nr. 1.4852G-X10NiCrNb32-20W.Nr 1.4859G-X50CrNi30-30W.Nr. 1.4868Tensile strength Rm [N/mm²]  ≥  440  ≥  440  ≥  440Yield strength Rp 0,2 [N/mm²]  ≥  220  ≥  175  ≥  220Elongation after fracture A5 [%]  ≥  6 1) ≥  20  ≥  6 1)1)For centrifugal casting ≥  8%    -The structure must not contain a sigma phase.-Quality grade acc. to EN 1559-2 1) and/or ASTM E 446, Category A2, B2, CA2 to CD2; welding bevelarea: A1, B1, CA1 to CD1.      -Quality grade 1 acc. to EN 1371-1, or ASME VIII/1 App. 8.-Outer and innder surfaces machined, peak-to-valley height according to indications on the drawing.Smaller defects may be removed by milling (this method to be used with preference) or grinding(verification by liquid penetrant examination). Grinding discs shall be free from P, Pb,- S and halogenes.-Welding bevels shall have grade 01 acc. to EN 1371-1 or ASME VIII/1 App. 8.-Admissible dimensional tolerances: casting tolerance CT 11 acc. to ISO 8062.    1) EN 1559-2 refers to prEN 12681 and determines the quality grades according to ASTM E446.    Linde AG - Linde Engineering Division Issue 09.2002LS 021-270 Page 3      -Welding procedure qualaification according to national codes and standards, carried out on one of thematerials given in Table 1.-Surface welding, if the specified minimum wall thickness has been underrun.The number of these weld repairs is limited to max. 5 per individual casting, by considering that the samelocation must not be repaired more than twice. If the defects are deeper than 20 % of the wall thickness, adecision by the purchaser is required. All weld repairs of these defects shall be recorded and subjected toa liquid penetrant examination. If defects have been found by radiographic examination, the weld repairsshall then be radiographed.   Extent of testing and requirements according to Table 3 and 4         No.TestsExtent of Testing/ExaminationRequirements1Heat analysisper heataccording to Table 121 tensile test at ambienttemperatureper heat and mouldaccording to Table 23Dimensional check, visualexamination and markinginside and outsideaccording to Para. 3.44Radiographic examination- machined welding bevels 1) - 100% per component acc. to Table 4 5)-acc. to Para. 3.3 2)-acc. to Para. 3.3 3)5Leak test with air/2 bar underwater or with frothing agent with0,5 bar / 5 minper component 4)no formation of bubbles6Hydrostatic test with 60 bar forat least, 15 minutesunless otherwise specified.per component; in case of collarflanges as part of a pipe, coil orpiping onlyThe 1,25-fold safety against theyield strength at ambienttemperature must not be underrun 7Liquid penetrant examinationon inner and outer surface100 % after machining andhydrostatic testaccording to Para. 3.41) not applicable in case of welding by the manufacturer of the casting2) preferably central shot3) If inadmissible defects are found during the radiographic examination, Para. 3.5 and EN 1559-1Para. 8.7 shall apply.4) The leak test is not necessary, if the manufacturer submits a defect statistics on already performed leaktests; this defect statistics shall be evaluated by Selas Linde.5) For static casting only.       Number of Castingper Heat and MoldNumber of Castingto be fully radiographedup to 15from 15 to 30from 30 to 601 (first part)2 (first and final part)3 (first, intermediate and final part    Linde AG - Linde Engineering Division Issue 09.2002LS 021-270 Page 4   Marking with manufacturer’s trademark, material designation, heat No. or consecutive cast No. and item No.Marking shall be cast or hard-stamped by using round-nose stamps.   The manufacturer shall notify the purchaser 5 working days in advance of in the inspection prior tohydrostatic test.       All items shall be cleaned from test mean residues and protected against rust from external sources, e.g. byappropriate covering. Ends shall be closed with plastic caps. Storage in the open air with protective coveronly.   Inspection certificate according to purchase order on testing/examination according to Para. 3.6.LINDE Standard 001-02 shall be observed.Revision: Materials in Table 1 and 2 changed, tests listed in Table 3.Previous issues: 07.90;.04.92, 05.96, 11.96Responsible department for the technical contents: TAWCopyright reserved.
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