1、 Standard Practice Format, Content, and Other Guidelines for Developing a Materials Selection Diagram This NACE International standard represents a consensus of those individual members who have reviewed this document, its scope, and provisions. Its acceptance does not in any respect preclude anyone
2、, whether he or she has adopted the standard or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not in conformance with this standard. Nothing contained in this NACE standard is to be construed as granting any right, by implication or otherwise, to manufac
3、ture, sell, or use in connection with any method, apparatus, or product covered by letters patent, or as indemnifying or protecting anyone against liability for infringement of letters patent. This standard represents minimum requirements and should in no way be interpreted as a restriction on the u
4、se of better procedures or materials. Neither is this standard intended to apply in all cases relating to the subject. Unpredictable circumstances may negate the usefulness of this standard in specific instances. NACE assumes no responsibility for the interpretation or use of this standard by other
5、parties and accepts responsibility for only those official NACE interpretations issued by NACE in accordance with its governing procedures and policies which preclude the issuance of interpretations by individual volunteers. Users of this NACE standard are responsible for reviewing appropriate healt
6、h, safety, environmental, and regulatory documents and for determining their applicability in relation to this standard prior to its use. This NACE standard may not necessarily address all potential health and safety problems or environmental hazards associated with the use of materials, equipment,
7、and/or operations detailed or referred to within this standard. Users of this NACE standard are also responsible for establishing appropriate health, safety, and environmental protection practices, in consultation with appropriate regulatory authorities if necessary, to achieve compliance with any e
8、xisting applicable regulatory requirements prior to the use of this standard. CAUTIONARY NOTICE: NACE standards are subject to periodic review, and may be revised or withdrawn at any time in accordance with NACE technical committee procedures. NACE requires that action be taken to reaffirm, revise,
9、or withdraw this standard no later than five years from the date of initial publication and subsequently from the date of each reaffirmation or revision. The user is cautioned to obtain the latest edition. Purchasers of NACE standards may receive current information on all standards and other NACE p
10、ublications by contacting the NACE FirstService Department, 1440 South Creek Dr., Houston, TX 77084-4906 (telephone +1 281-228-6200). Revised 2013-10-04 Approved 2007-06-22 NACE International 1440 South Creek Drive Houston, Texas 77084-4906 +1 281-228-6200 ISBN 1-57590-212-5 2013, NACE International
11、 NACE SP0407-2013 Item no. 21123 SP0407-2013 NACE International i _ Foreword This standard practice provides format, content, and other guidelines for developing a materials selection diagram (MSD). An MSD documents the materials selection of new equipment and piping for the refinery, process chemic
12、al, power, and other industries. This standard is intended for use by the owner/operators, licensors, and the contractor/fabricators of petroleum refineries, process chemical plants, power plants, and other industrial processing plants as a reference guide for developing an MSD to identify the mater
13、ials of construction and the process conditions and other key technical issues that influence the selection of materials for use during the development and construction phases of projects. This standard was originally prepared in 2007 and revised in 2013 by Task Group (TG) 302, “Refining and Chemica
14、ls Material Selection Diagrams: Standard.” TG 302 is administered by Specific Technology Group (STG) 34, “Petroleum Refining and Gas Processing,” DQGis sponsored by STG 36, “Process Industry: Materials Performance in Chemicals.” This standard is issued by NACE under the auspices of STG 34. In NACE s
15、tandards, the terms shall, must, should, and may are used in accordance with the definitions of these terms in the NACE Publications Style Manual. The terms shall and must are used to state a requirement, and are considered mandatory. The term should is used to state something good and is recommende
16、d, but is not considered mandatory. The term may is used to state something considered optional. _ SP0407-2013 ii NACE International _ Standard Practice Format, Content, and Other Guidelines for Developing a Materials Selection Diagram Contents 1. General . 1 2. Equipment and Materials Information t
17、o Be Shown on MSD . 1 3. Process Data to Be Shown on MSD . 6 4. Guidelines on Completing the MSD 7 References 8 Appendix A: Sample Materials Selection Diagrams . 9 FIGURES Figure A1: Sample 1 . 9 Figure A2: Sample 2, Part 1 10 Figure A3: Sample 2, Part 2 11 TABLES Table 1: Information to Be Shown on
18、 MSD. 1 Table 2: Typical Material Designations . 3 Table 3: Other Commonly Used Nomenclature 4 _ SP0407-2013 NACE International 1 _ Section 1: General 1.1 An MSD summarizes material requirements for process equipment and piping in the refining, chemical processing, power, and other industries, and p
19、rovides information needed for the development of piping and instrumentation diagrams (P however, it is helpful to also show the generic materials designator, because these numbering formats may not be immediately recognized. 2.2.3 A legend of the material designations should be included on each MSD
20、. Examples of some typical material designations that have been used are listed in Table 2, along with examples of the UNS designations for materials that may fit that category (any additional materials may also be used). Table 2 Typical Material Designations MSD Format Example UNS Designations(A)Fu
21、ll Designation CI Cast iron DI Ductile iron CS K02504, K02401, K03006 Carbon steel LTCS Low-temperature Carbon Steel 1 Cr K11562, K11756 1 Cr- Mo 2 Cr K21590 2 Cr-1 Mo 5 Cr K41545 5 Cr- Mo 9 Cr K81590 9 Cr-1 Mo 12 Cr S40500 (405 SS), S41000 (410 SS), or S41008 (410S SS) 12-13 Cr steel 304L S30403 30
22、4L SS 316L S31603 316L SS 321 S32100 321 SS 347 S34700 347 SS 310 S31000 310 SS 2205 Duplex SS S32205/S31803 22% Cr Duplex SS Super Duplex SS S32750, S32760 and others 25% Cr Super Duplex SS Alloy 20 N08020 Alloy 20 6% Mo S31254, N08367, N08926 Superaustenitic SS with 6% Mo 800 N08800 (alloy 800) Al
23、loy 800 800H N08810 (alloy 800H) Alloy 800H 800HT N08811 (800HT) Alloy 800HT 825 N08825 Alloy 825 625 N06625 Alloy 625 276 N10276 Alloy C-276 400 N04400 Alloy 400 Adm C44300, C44400, C44500 Admiralty brass (2) Unified Numbering System for Metals and Alloys (UNS). UNS numbers are listed in Metals the
24、refore, specifying anything more than the generic material category is not common during the initial stage of a projects life (see Paragraph 2.2.1). 2.2.4 In some cases, specific trade names have been used when a material with specific properties is required (see Paragraph 2.2.1). 2.2.5 Dual grade m
25、aterials, such as UNS S30400/S30403 (Type 304/304L) or UNS S31600/S31603 (Type 316/316L), are also sometimes specified to achieve specific properties. 2.2.6 Cladding, lining, or weld overlay shall be indicated using a material designation such as “CS with 2.5 mm (0.10 in) minimum 304L cladding.” For
26、 internal coatings and linings, specific types (e.g., epoxy phenolic, vulcanized natural rubber, or vinyl ester) should be indicated. 2.3 Content and Format of Notes 2.3.1 General notes are notes applicable to the entire process unit and should be labeled with a unique identifier (typically a letter
27、) on all MSDs. General notes that are applicable to a process unit should be repeated in the same order using the same identifier on all MSDs. 2.3.2 Specific notes are unique to specific pieces of equipment, piping, or locations on the MSD, and should be cited appropriately. Specific notes should be
28、 labeled with a unique identifier (typically a number) and generally follow the general notes on the associated MSD page. 2.3.3 All nomenclature used on the MSD should be defined in a general note or legend. These definitions shall include, but are not limited to, the material nomenclature listed in
29、 Paragraph 2.2.3 that has been used on the MSD. Table 3 lists examples of other commonly used nomenclature. Others may be used as agreed on by the owner/operator and the contractor/fabricator. Table 3 Other Commonly Used Nomenclature Nomenclature Meaning B Baffles C Case CA Corrosion allowance CH Ch
30、annel H Header IMP Impeller INJ Injection point (e.g., water wash, chemicals) INT Internals PWHT Postweld Heat Treatment for service or material. (Design code requirements for PWHT based on thickness must also be met, but are not typically identified on the MSD.) SH Shell SR Stress relief for servic
31、e or material. (Design code requirements for PWHT based on thickness must also be met, but are not typically identified on the MSD.) T Tubes TS Tubesheets SP0407-2013 NACE International 5 2.3.4 All special materials and fabrication requirements shall be listed on the MSD, usually in the specific not
32、es. Examples of special requirements that have been used on MSDs in the past include: 2.3.4.1 UNS N08020 (Alloy 20) or UNS N08825 (Alloy 825) for drain connections on SS reactor inlet and outlet lines. 2.3.4.2 Maximum strength limit on CS for a liquefied petroleum gas (LPG) sphere. 2.3.4.3 Thermal s
33、tabilization of base materials and welds for UNS S32100 (Type 321 SS) or UNS S34700 (Type 347 SS) operating at temperatures greater than 427 C (800 F). 2.3.4.4 Special gaskets and seal materials for methyl tertiary-butyl ether (MTBE) service. 2.3.4.5 No substitution of vanadium-grade Cr-Mo steels, w
34、here straight grades are specified, possibly with limits on the vanadium content. 2.3.4.6 SR of CS or SS u-bends in environmental cracking services. 2.4 Corrosion Allowance 2.4.1 CA can be a critical parameter in the selection of materials of construction for pressure-containing components in a unit
35、. Because of this, a minimum CA should be specified. For non-corrosive service and/or when high alloys are specified, the CA can be shown as zero (0). 2.4.2 A specific minimum acceptable CA shall be indicated on the MSD for each pressure-containing component excluding rotating equipment cases, and e
36、xcept as noted in Paragraph 2.4.3. Example formats that have been used successfully include (see Appendix A for examples): 2.4.2.1 CS with X CA, where X represents the thickness in the appropriate unit of measure. 2.4.2.2 Showing the materials reference above the line and showing the CA directly bel
37、ow it. 2.4.2.3 CS-X, where a legend is created to indicate the specific CAs for each code being used. 2.4.3 When only one minimum CA for a specific material will be used on entire MSD, it can be listed as a general note in accordance with Paragraph 2.3.1 in lieu of the methods listed in Paragraph 2.
38、4.2. 2.5 Examples of Additional Information 2.5.1 Additional requirements for corrosion control may be shown by notes on the MSD such as requirements for corrosion inhibitors, internal cathodic protection (CP), water wash injections, sampling locations, and corrosion probes. Examples of operational
39、requirements which may be specified as notes include velocity limits, minimum design metal temperature (MDMT), and minimum pH requirements. 2.5.2 The injection point location for chemical injections (e.g., corrosion inhibitors, dispersants, antifoulants) along with the generic chemical type (e.g., c
40、austic solutions, neutralizing amine, etc.) should be shown on the MSD. Requirements for quills or spray nozzles should be indicated at each location, typically with a specific note. 2.5.3 Corrosion probes may be uniquely numbered. Additionally, details on the type of probes may be provided in the s
41、pecific notes. 2.5.4 Injection and mix points may be uniquely numbered. 2.5.5 Equipment and piping design service life may be shown on the MSD. For example, vessels: 30 year service life; bundles: 10 year service life; piping: 10 year service life; heater tubes: 12 year service life. At a minimum, t
42、he design service life should be defined in the transmittal information with the MSDs. 2.5.6 The MSD should schematically show changes in piping material, CA, PWHT, or other special requirements that occur in the piping. Changes that occur at the inlet/outlet flanges on stationary and rotating equip
43、ment are not typically shown with special symbols. The piping changes (material specification breaks) typically occur at control valves, valves in bypass loops, or valves upstream from mix points. Because of the high level of detail required to fully describe piping material changes, SP0407-2013 6 N
44、ACE International these changes are indicated generically on the MSD, leaving the detailed specifics of the materials change for tools such as P&IDs or piping line designations. 2.5.7 If the pump materials of construction are shown on the MSD, centrifugal pump materials should be shown by reference
45、to the “classes” in API Standard 610,5PIP(5)Practices, or generically by listing the recommended materials for the case and impeller. For other types of pumps, the materials for the case, impellers, and other applicable major components should be shown. If pump materials are modified from those show
46、n for the referenced standards class, the specified changes should be clearly explained in the specific MSD notes. 2.6 Consistency The nomenclature and formatting shall remain consistent throughout all of the MSDs associated with a process unit or project. The revision of the PFDs and/or heat and ma
47、terial balance (H&MBs) that were used as the basis of the MSD should be indicated in the General Notes. _ Section 3: Process Data to Be Shown on MSD 3.1 Process Data 3.1.1 The process data used for materials selection should be shown on the MSD. The pertinent data may vary from unit to unit, as the
48、predicted damage mechanisms may vary. Example of typical data (as applicable), including corrosive agents and contaminants that have the potential to affect materials selection, include: 3.1.1.1 Operating temperature. 3.1.1.2 Operating pressure. 3.1.1.3 Hydrogen partial pressure. 3.1.1.4 MDMT (especially for low-temperature processes or areas subject to autorefrigeration). 3.1.1.5 H2S and/or CO2concentration or partial pressure. 3.1
