1、RCC-M-Edition 2007 SECTION I：SUBSECTION C CLASS 2 COMPONENTS_CLASS 2 COMPONENTSSECTION I : SUBSECTION C DESIGN AND CONSTRUCTION RULESFOR MECHANICAL COMPONENTS OF PWRNUCLEAR ISLANDSRCC-MRCC-M - Edition 2007 Subsection C C 1000 GENERAL C 1100 INTRODUCTION Subsection C of the RCC-M covers class 2 press
2、ure retaining components and their parts as defined in chapter A 4000. Subchapter C 1200 specifies the documents to be prepared for the components and their parts. Subchapter C 1300 specifies identification procedures for component parts and weldments. Chapter C 2000 sets rules for selection of mate
3、rials for parts. Chapter C 3000 sets rules for design of equipment. Chapter C 4000 sets rules for manufacturing of components and their parts and for examinations performed both prior to and following manufacture. Chapter C 5000 sets rules for pressure tests. When annex ZS is explicitly required by
4、the contract, it supplements the requirements of this subsection whenever necessary. C 1200 REQUIRED DOCUMENTS Chapter A 3000 defines these documents and describes their content. Documents required under this subsection shall be kept at the disposal of Surveillance Agents. The contract shall specify
5、 which documents are to be handed over to the relevant parties. C 1210 EQUIPMENT DOCUMENTS The following documents shall be prepared for components falling within the scope of subsection C. Where production conditions so permit, an entire lot of components may be covered by the same documents. n 113
6、-2007 C 1000 / 1 RCC-M - Edition 2007 Subsection C C 1211 DOCUMENTS ATTACHED TO THE PURCHASE ORDER - Equipment specification (technical purchase order addenda) - A 3100. C 1212 PRELIMINARY DESIGN AND MANUFACTURING DOCUMENTS - Comprehensive layout and referencing documents - A 3201. - Sizing report -
7、 A 3202. - Component parts list - A 3203. - Description of fabrication shops - A 3204 - Quality plan (initial phase) - A 3801. C 1213 DOCUMENTS PREPARED AND UPDATED DURING FABRICATION - Comprehensive layout and referencing documents - A 3201. - Component parts list - A 3202. - Stress report (if requ
8、ired by the equipment specification) - A 3203. - Welding data package - A 3501. - A welding data package shall be prepared for a given pressure-retaining component. It shall be updated to account for innovations in welding methods. - Hydrostatic test reports - A 3603 (which refers to C 5000). - Non-
9、conformance report ad deviation report - A 3700. - Quality plan (follow-up document) - A 3801. - Pressure test specification. - Test certificate. - Test report. C 1214 POST-MANUFACTURING DOCUMENTS - End-of-manufacturing certificate - A 3804. - End-of-manufacturing report - A 3805. C 1220 DOCUMENTS F
10、OR COMPONENT PARTS C 1221 PROCUREMENT DOCUMENTS - Technical part and product manufacturing programmes - A 3301 SECTION II of this Code (procurement specifications and subchapter M 300) specifies the parts and products for which such programmes must be drawn up. C 1000 / 2 n 113-2007 RCC-M - Edition
11、2007 Subsection C - Part and product sub-purchase orders (technical and administrative clauses) - A 3302 (which refers to SECTION II. paragraph M 111). - Part type record (for castings) A 3303-1 (which refers to M 160). - Characterisation report for prototype series of heat exchanger tubes - A 3303-
12、2 (which refers to M 170). - Procurement specification - paragraph M 113 of SECTION II states the conditions under which special procurement specifications must be drawn up. - Filler materials acceptance specification - A 3502 (which refers to S 2120 and S 8170). - Filler materials acceptance report
13、 - A 3503 (which refers to S 2550 and S 8250). C 1222 MANUFACTURING DOCUMENTS - Fabrication procedures or instructions - A 3401. - Welding documents - A 3502. - Welding reports - A 3503. - Examination procedures or instructions - A 3601. - Examination reports - A 3602. C 1223 NON-CONFORMANCE REPORT
14、AND DEVIATION REPORT - See A 3700. C 1300 IDENTIFICATION C 1310 PURPOSE OF EQUIPMENT IDENTIFICATION SYSTEM The equipment identification system is a means of unequivocally associating an equipment part or weld joint with a given set of documents. C 1320 ADAPTATION OF IDENTIFICATION SYSTEM TO PRODUCTI
15、ON CONTROL METHODS Identification procedures must therefore be adapted to the type of production control method applied to the part or weld: - a control of individual items, using one identification number per item, - a control by lot, using one identification number per lot. When a part is taken di
16、rectly from stock and has only a steel grade number, the identification procedures set forth in this Code shall not apply. n 113-2007 C 1000 / 3 RCC-M - Edition 2007 Subsection C C 1330 IDENTIFICATION METHODS Methods used to identify the components may include: - etching, - temporary marking (with i
17、nk, paint, etc.), - labelling, - routing slips. Identification methods and shop organization procedures shall be defined with a view to ensuring compliance with the objective set under C 1310. C 1340 TYPE OF IDENTIFICATION DATA The RCC-M does not require information related to the origin of any part
18、 or weld (such as heat no., lot no., heat treatment no., welding operator no., etc.) to be marked or written on that item, its label, or its routing slip. However, marks or codes which provide clear reference to documents containing the information required for production control will always be acce
19、ptable. Where lots are divided into one or more fabrication sublots (e.g. for heat treatment), the original lot number need not appear on each item, provided that the new identification system allows for accurate identification of the items origins. C 1350 RE-MARKING AND RELABELLING If an identifica
20、tion code is removed or erased during fabrication, the Manufacturer shall mark or label another portion of the part as appropriate. Machined items belonging to the same lot do not need to be re-marked after each machining operation, provided that: - fabrication procedures provide for total segregati
21、on of lots, - rejects are marked immediately, visibly and indelibly. In the particular case of plates, where rolling direction is of significance for subsequent fabrication or testing (e.g. for removal of test samples), this information must appear on the item involved. A discard shall always be ide
22、ntified according to its intended use. C 1000 / 4 n 113-2007 RCC-M - Edition 2007 Subsection C C 1360 MARKING METHODS Marking methods shall comply with the requirements given in chapter F 2000. C 1370 REFERENCING OF WELDS C 1371 RULES APPLICABLE TO ALL EQUIPMENT The following shall be necessary to e
23、stablish a clear correlation between the weld and its documentary records: a) for welds ground flush with base metal: position of weld joint plane shall be indicated before welding by etching four symbols into the metal at 90 angles to each other, or either side of and at equal distances from a girt
24、h weld and at either end of a longitudinal weld. These marks shall be located at least 80 mm from the weld bevel. However, the weld joint may be referenced on only one side provided that the position of reference marks and the tolerance value with respect to the bevel are shown on a drawing or in a
25、procedure and that the identification number starts with an arrow indicating the position of weld with respect to the reference marks. b) for radiographically-examined welds on pressure-retaining components: a reference point shall be given on each weld as a basis for all referencing, including loca
26、tion marking of radiographic films. Where location markers have not been used, another symbol placed next to the reference point will indicate in which direction the radiographs should be turned for interpretation. C 1372 RULES FOR PIPING All pipe welds, including those ground flush with the base me
27、tal and those requiring radiographic examination, shall be marked with an identification number. Identification numbers shall be designated in accordance with isometric drawings. They shall be etched in the metal at least 40 mm from the weld bevels, prior to the welding operation. This distance may
28、not be complied with in certain cases where its observance could be impossible or could lead to a problem or an ambiguity concerning identification. However, this marking shall be made as far as possible from the weld bevels. Marking shall take place prior to the welding operation. Reference marks s
29、hall also be made near the identification numbers. Numbers for welds ground flush with the base metal shall be located no less than 80 mm from the weld bevels. The Contractor shall establish marking procedures which he shall make mandatory for all Manufacturers, to ensure that identification codes f
30、or all parts of a given installation are consistent. C 1373 RULES FOR OTHER EQUIPMENT All pressure-retaining welds, including those ground flush with the base metal and those requiring radiographic examination, shall be marked with an identification number. n 113-2007 C 1000 / 5 RCC-M - Edition 2007
31、 Subsection C All identification numbers shall be given on the Manufacturers documents. If, for technical reasons, these markings must be removed or erased, their original location with relation to specified points on the equipment can be obtained from the drawings. Templates may be used for relocat
32、ing identification markings on some weld joints, specially as an alternative to the above-mentioned drawings. C 1000 / 6 n 113-2007 RCC-M - Edition 2007 Subsection C C 2000 MATERIALS C 2100 GENERAL Chapter C 2000 sets forth conditions for selection and use of materials in the manufacture of products
33、 and parts for the equipment covered by subsection C. Reference is made, where appropriate, to SECTION II, MATERIALS. Note : The terms ferritic steels and austenitic steels have sometimes been wrongly used in the various sections of this Code. Materials corresponding to procurement specification ser
34、ies M 3300, M 3400 and M 4000 of SECTION II, shall be considered as belonging to the category austenitic steels. Other materials belong to the category ferritic steels. C 2200 APPLICATION OF SECTION II C 2210 GENERAL The conditions specified in chapter M 100 shall apply. Table C 2200 lists procureme
35、nt specifications to which the Manufacturer shall refer for parts or types of parts covered by the requirements of this subsection. The class 2 criteria in product procurement specifications covering several classes of components specified in table C 2200 shall be applicable to all pressure-retainin
36、g components. Class 2 criteria shall similarly be applicable to all non-pressure-retaining components unless otherwise specified (class 3) in the applicable documents column of table C 2200. Options, particularly relative to choice of grade, may be limited by the equipment specification. Where procu
37、rement specifications do not, as a matter of course require verification of a tensile test at high temperature, this verification shall be performed if the operating temperature specified in the equipment specification is greater than 250C. Test conditions shall be those stipulated in the procuremen
38、t specifications for the part or product. Under 250C, depending upon the grades used and/or particular stresses, the equipment specification or other applicable documents may require verification of the tensile test at high temperature. n 113-2007 C 2000 / 1 RCC-M - Edition 2007 Subsection C C 2220
39、CLASSIFICATION OF PUMP INTERNALS (construction categories) Pump internals are classified in three categories: A, B and C. Categories A and B may be subdivided into sub-categories A1, A2, B1 and B2. C 2221 BASIC PARAMETERS (see figure C 2221) The classification takes two parameters into account: - ma
40、ximum peripheral speed U2in m/s corresponding to the normal operating speeds, - slenderness ratio of the impeller defined as the ratio of the internal width of the channel at the impeller outlet (B2mm) and to external diameter of the impeller (D2mm). 22DBe = (the slenderness ratio of booster impelle
41、rs is considered as 0.12). Note: The dimensions taken into account are those of parts in machined condition. C 2222 ALLOCATION CRITERIA The construction category allocation criteria are defined in table C 2222. TABLE C 2222 Peripheral speed Slenderness m/s ratio U20.12 C ?2B1BB ?2A1AA The classifica
42、tion of the diffuser is identical to that of the corresponding impeller. The classification of other internals (e.g.: shrouds, return guide vanes, etc.) is defined in the equipment specification. Generally it is identical to the corresponding impeller. Non-destructive examinations resulting from the
43、 previous criteria are indicated in the relevant reference procurement specifications. C 2000 / 2 n 113-2007 RCC-M - Edition 2007 Subsection C C 2300 SUSCEPTIBILITY TO INTERGRANULAR CORROSION C 2310 RULES FOR CLASSIFYING COMPONENTS ACCORDING TO SUSCEPTIBILITY TO INTERGRANULAR CORROSION With respect
44、to susceptibility to intergranular corrosion, austenitic or austenitic-ferritic stainless steel components and component parts covered by this subsection shall be classified on the basis of type and thickness of the product (plate, pipe, casting, etc.) and manufacturing operations, into one of the f
45、ollowing groups. Group 1: The risk of intergranular corrosion in service is taken into consideration and subsequent to solution heat treatment the material, during fabrication, is subjected to welding, hot working or heat treatment (at a temperature greater than 450 C) which is not followed by solut
46、ion heat treatment (repair of castings by welding shall be considered to be equivalent to a welding operation). Group 1 a: The risk of intergranular corrosion is taken into consideration and subsequent to solution heat treatment the material is only subjected, during fabrication, to welding. The thi
47、ckness of the weld joint shall not exceed 3 mm. Group 2: The risk of intergranular corrosion is taken into consideration but subsequent to solution heat treatment the material is neither welded, hot worked nor heat treated (at a temperature greater than 450C). The risk of intergranular corrosion is
48、taken into consideration even when it is accidental for materials classified into class 2 according to safety function in compliance with A 4231. The equipment specification shall specify whether the risk of intergranular corrosion may be discarded for components which are only classified according
49、to operating conditions in compliance with A 4232 and that the requirements of C 2320 are not applicable. C 2320 REQUIREMENTS C 2321 SELECTION OF STEEL GRADES On the basis of the requirements given above, the use of austenitic stainless steel and austenitic-ferritic stainless steel shall be subject to certain restrictions. Group 1: Only very low carbon austenitic stainless steels, with or without molybdenum, and austenitic stainless steels stabilized with niobium or titanium may be used. In addition
