PIP PNCM0001 Piping Line Class Designator System

Transcription

1 TECHNICAL REVISION December 2015 Piping PIP PNCM0001 Piping Line Class Designator System

2 PURPOSE AND USE OF PROCESS INDUSTRY PRACTICES In an effort to minimize the cost of process industry facilities, this Practice has been prepared from the technical requirements in the existing standards of major industrial users, contractors, or standards organizations. By harmonizing these technical requirements into a single set of Practices, administrative, application, and engineering costs to both the purchaser and the manufacturer should be reduced. While this Practice is expected to incorporate the majority of requirements of most users, individual applications may involve requirements that will be appended to and take precedence over this Practice. Determinations concerning fitness for purpose and particular matters or application of the Practice to particular project or engineering situations should not be made solely on information contained in these materials. The use of trade names from time to time should not be viewed as an expression of preference but rather recognized as normal usage in the trade. Other brands having the same specifications are equally correct and may be substituted for those named. All Practices or guidelines are intended to be consistent with applicable laws and regulations including OSHA requirements. To the extent these Practices or guidelines should conflict with OSHA or other applicable laws or regulations, such laws or regulations must be followed. Consult an appropriate professional before applying or acting on any material contained in or suggested by the Practice. This Practice is subject to revision at any time. Process Industry Practices (PIP), Construction Industry Institute, The University of Texas at Austin, 3925 West Braker Lane (R4500), Austin, Texas PIP Member Companies and Subscribers may copy this Practice for their internal use. Changes or modifications of any kind are not permitted within any PIP Practice without the express written authorization of PIP. Authorized Users may attach addenda or overlays to clearly indicate modifications or exceptions to specific sections of PIP Practices. Authorized Users may provide their clients, suppliers and contractors with copies of the Practice solely for Authorized Users purposes. These purposes include but are not limited to the procurement process (e.g., as attachments to requests for quotation/ purchase orders or requests for proposals/contracts) and preparation and issue of design engineering deliverables for use on a specific project by Authorized User s client. PIP s copyright notices must be clearly indicated and unequivocally incorporated in documents where an Authorized User desires to provide any third party with copies of the Practice. PUBLISHING HISTORY February 1997 Issued as PNSM0001 May 2001 Technical Correction December 2015 Complete Revision February 1999 Complete Revision October 2006 Complete Revision & Renumbering November 1999 Revision June 2007 Editorial Revision Not printed with State funds

3 TECHNICAL REVISION December 2015 Piping PIP PNCM0001 Piping Line Class Designator System Table of Contents 1. Introduction Purpose Scope Requirements General Field Definitions Example Designation Standard Notes Cover Sheet / Addendum Form... 4 Appendices Appendix A - Cover Sheet/Addendum Form Appendix B - Sample Cover Sheet Appendix C - Sample Addendum Appendix D - Piping Line Class Designator System Summary Sheet Process Industry Practices Page 1 of 11

4 TECHNICAL REVISION Piping Line Class Designator System December Introduction 1.1 Purpose This Practice provides the designator system for identifying PIP piping line classes. 1.2 Scope This Practice describes the arrangement of the PIP piping line class designations and the requirements for each field within a designation. Designation requirements are provided for both PIP-developed and owner-developed piping line classes. A one-page summary of the PIP Piping Line Class Designator System specified in this Practice is provided in Appendix D. 2. Requirements 2.1 General The Piping Line Class Designator System shall consist of six alternating alphanumeric fields containing one or two characters each (maximum of ten characters). The first five fields are mandatory while the sixth is optional Each field shall describe various features of a piping line class. 2.2 Field Definitions First Field Pressure Rating The first field shall define the pressure rating The pressure rating field shall consist of one or two numeric characters in accordance with Table Second Field Piping Material The second field shall define the nominal pipe material The nominal pipe material field shall consist of two alphabetic characters in accordance with Table Third Field Corrosion Allowance The third field shall define the corrosion/erosion allowance The corrosion/erosion allowance field shall consist of one numeric character in accordance with Table Fourth Field Joint Construction The fourth field shall define the joint construction/construction type The joint construction/construction type field shall consist of one alphabetic character in accordance with Table 4. Process Industry Practices Page 2 of 11

5 TECHNICAL REVISION Piping Line Class Designator System December Fifth Field Sequential Number The fifth field shall define a sequential number for numbering variations of a line class The sequential number field shall consist of two numeric characters that shall be applied in accordance with the following ranges: a. Numbers 01 through 79 Reserved for PIP piping line classes b. Numbers 80 through 99 Reserved for owner developed piping line classes Sixth Field Owner s Designation (As Required) To change the designation number if revisions, alterations, and/or additions to a PIP piping line class are required, the owner shall add an alphabetic character after the fifth field designator The number of alphabetic characters shall be limited to two for a maximum of ten characters total to designate a line class The alphabetic character(s) shall be added directly to the PIP piping line class number as a suffix and without a delimiter. 2.3 Example Designation An example of a complete PIP piping line class designator is 3CS1S01. Where: First Field (Pressure Rating): 3 = ASME Pressure Class 300 Second Field (Piping Material): CS = Carbon Steel Base Material Piping System Third Field (Corrosion Allowance): 1 = Multiples of 1/16" Fourth Field (Joint Construction): S = Socketweld Small Bore Construction and Buttweld and Flanged Large Bore Construction Fifth Field (Sequential Number): 01 = First Piping Line Class in this piping material/ pressure class series 2.4 Standard Notes PIP Standard Notes Standard notes with associated note numbers have been developed for the PIP piping line classes. The notes provide additional information (i.e., guidance, caution, clarification, etc.) Applicable PIP Standard Notes shall be shown on each PIP piping line class PIP Standard Notes shall be designated using numbers 01 through 699 as required. Process Industry Practices Page 3 of 11

6 TECHNICAL REVISION Piping Line Class Designator System December Owner Standard Notes If company- or project-specific notes are required for a PIP piping line class, the notes shall be added using an addendum form (see Section 2.5.3) Owner standard notes shall be designated using numbers 700 through 999 as required, or a designation that does not conflict with the PIP Standard Notes numbering system. 2.5 Cover Sheet / Addendum Form A Cover Sheet / Addendum Form is provided in Appendix A for use as a cover sheet for incorporating the PIP piping line classes into an owner s corporate standards system, or for use as an addendum for specifying company- or projectspecific revisions, alterations, and/or additions to PIP piping line classes Cover Sheet An owner s corporate standards system may require that a cover sheet be attached to a PIP piping line class to communicate the extent to which the specification applies within the owner s company and/or for the owner s specific project If the dual-purpose Cover Sheet / Addendum Form is used as a cover sheet, and if revisions, alterations, or additions to the line class specification are not required, the owner should complete the fields on the form as follows: a. PIP Practice number, PIP piping line class number, and Scope should be filled in. b. The Addendum Number should not be filled in. c. The words No Change should be filled in for Sections 2 through An example of a completed form used as a cover sheet is shown in Appendix B Addendum for Revisions, Alterations, and Additions An owner s company, operating location, or project may require revisions, alterations, and/or additions to a PIP piping line class(es). To accommodate such cases, the dual-purpose Cover Sheet / Addendum Form should be used as an addendum to specify the changes If the Cover Sheet / Addendum Form is used as an addendum to specify revisions, alterations, and/or additions to a PIP piping line class, the owner should complete the following fields on the form as follows: a. PIP Practice number, PIP piping line class number, and Addendum Number alphabetic character(s) should be filled in. b. Within the sections (i.e., Scope, Design, Materials, etc.) where changes are specified, necessary information to detail the deviation(s) to the PIP piping line class should be filled in. Process Industry Practices Page 4 of 11

7 TECHNICAL REVISION Piping Line Class Designator System December 2015 c. The words No Change should be filled in for the unchanged sections An owner may create more than one addendum for a PIP piping line class An example of a completed form used as an addendum is shown in Appendix C. Table 1 - Pressure Rating Symbol Nominal Pressure Rating or Class ASME B16.5 or B16.47 Flange Class ASME 16.1 Cast Iron Flange Class Tubing Rating shown in the Piping Class Reserved for Owner-Specific Rating Designations Process Industry Practices Page 5 of 11

8 TECHNICAL REVISION Piping Line Class Designator System December 2015 Table 2 - Piping Material Symbol Material Aluminum Alloys AA AB AC AD AE AF AG Aluminum Alloy 1100, H112 temper Aluminum Alloy 3003, H112 temper Aluminum Alloy 5052, H32 temper Aluminum Alloy 5454, H112 temper Aluminum Alloy 6061, T6 temper Aluminum Alloy 6063, T1 temper Aluminum Alloy 6063, T6 temper Brass, Bronze, Copper, and Copper Alloys BA BB BC BD BE BF BG BT Aluminum-Bronze Red Brass Copper, deoxidized pure Cu-Ni Cu-Ni Cu-Ni Silicon-Bronze Cast Leaded Tin Bronze Carbon and Low-Alloy Steels CA CB CC CG CH CJ CK CL CM CN CS Impact Tested Carbon Steel Killed Carbon Steel Low Carbon Steel Galvanized Carbon Steel Killed Carbon Steel, PWHT for Process 1-1/4 Cr - 1/2 Mo Alloy Steel 2-1/4 Cr - 1 Mo Alloy Steel 5 Cr - 1/2 Mo Alloy Steel 9 Cr - 1 Mo Alloy Steel 12 Cr Alloy Steel Carbon Steel Iron, Ductile, Malleable, or Cast DA DC DF DM Ductile Iron, Austenitic Cast Iron, Grey Ductile Iron, Ferritic Malleable Iron Process Industry Practices Page 6 of 11

9 TECHNICAL REVISION Piping Line Class Designator System December 2015 Table 2 - Piping Material (continued) Symbol Material Fiberglass Reinforced Plastics (FRPs) and Resins FC FE FF FP FV Carbon Fiber Reinforced Furan Glass Fiber Reinforced Epoxy Glass Fiber Reinforced Furan Glass Fiber Reinforced Polyester Glass Fiber Reinforced Vinyl Ester Non-Metals/Non-Plastics KA KB KC KD Clay Concrete Glass Ceramic Lined or Internally Coated Steel/Iron/etc. LA LB LC LD LE LF LG LH LJ LK LP LR LS LT LV PFA (Perfluoro Alkoxyalkane copolymer)-lined Carbon Steel Cement-lined Ductile Iron Cement-lined Carbon Steel PTFE (Polytetrafluoroethylene)-lined Ductile Iron Epoxy-lined Carbon Steel FEP (Perfluoro Ethylene-Propylene copolymer)-lined Carbon Steel Glass-lined Carbon Steel ECTFE (Ethylene-Chlortrifluoroethylene)-lined Carbon Steel PFA (Perfluoro Alkoxyalkane copolymer)-lined Ductile Iron PVDF (Polyvinylidene Fluoride)-lined Carbon Steel PP (Polypropylene)-lined Carbon Steel Rubber-lined Carbon Steel PVDC (Polyvinylidene Chloride)-lined Carbon Steel PTFE (Polytetrafluoroethylene)-lined Carbon Steel PVC (Polyvinyl Chloride)-lined Carbon Steel Misc. Metals, not covered elsewhere MG ML MS MT MY MZ Gold Lead Silver Tantalum Zirconium + Cb Zirconium Process Industry Practices Page 7 of 11

10 TECHNICAL REVISION Piping Line Class Designator System December 2015 Table 2 - Piping Material (continued) Symbol Material Nickel and Nickel Alloys NA Alloy C-2000 UNS N06200 NB Alloy B2 UNS N10665 NC Alloy C276 UNS N10276 ND Alloy B UNS N10001 NE Alloy C4 UNS N06455 NF Alloy C22 UNS N06022 NG Alloy G UNS N06007 NH Alloy B3 UNS N10675 NJ Alloy G3 UNS N06985 NK Nickel 200 UNS N02200 NL Nickel 201 UNS N02201 NM Alloy 400 UNS N04400 NN Alloy C30 UNS N06030 NP Alloy 600 UNS N06600 NQ Alloy 625 UNS N06625 NR Alloy 800 UNS N08800 NY Alloy 800H UNS N08810 NZ Alloy 800HT UNS N08811 NS Alloy 825 UNS N08825 NT Alloy 20 UNS N08020 NU Alloy 20Cb-3 UNS N08020 NV Alloy 20-Mod UNS N08320 NW Alloy 25-6 Moly UNS N08926 NX Alloy AL-6XN UNS N08367 Plastics (other than FRPs) PA PB PC PD PE PF PG PK PP PS PT PU PV ABS (Acrylonitrile-butadiene styrene) PB (Polybutylene) CAB (Cellulous acetate-butyrate) HDPE (High Density Polyethylene) LDPE (Low Density Polyethylene) PFA (Perfluoro Alkoxyalkane copolymer) FEP (Perfluoro Ethylene-Propylene copolymer) PVDF (Polyvinylidene Fluoride) PP (Polypropylene) PVDC (Polyvinylidene Chloride) PTFE (Polytetrafluoroethylene) CPVC (Chlorinated Polyvinyl Chloride) PVC (Polyvinyl Chloride) Process Industry Practices Page 8 of 11

11 TECHNICAL REVISION Piping Line Class Designator System December 2015 Table 2 - Piping Material (continued) Symbol Material Stainless (High-Alloy) Steels SA Type 304/304L SS SC Type 304H SS SD Type 316/316L SS SE Type 317/317L SS SF Type 316H SS SG Type 317 SS SH Type 317L SS SJ Type 321 SS SK Type 321H SS SL Type 347 SS SM Type 347H SS SN Type 904L SS UNS N08904 SP 2205 Duplex SS UNS S31803 / UNS S32205 SQ 2507 Super Duplex SS UNS S32760/ UNS S32750 SR Type 304 SS SS Type 304L SS ST Type 316 SS SU Type 316L SS SV 254 SMO UNS S31254 Titanium and Titanium Alloys TB Titanium Grade 2 TC Titanium Grade 3 TD Titanium Grade 7 TE Titanium Grade 12 Reserved for Future Use E_, G_, H_ J_, Q_, R_ U_, V_ Not Used I_, O_ Reserved for Owner-Specific Designators W_ X_ Y_ Z_ Process Industry Practices Page 9 of 11

12 TECHNICAL REVISION Piping Line Class Designator System December 2015 Table 3 - Corrosion/Erosion Allowance Symbol Allowance (Nominal) 0 zero corrosion allowance mm (0.063 inch) (1/16 inch) 2 3 mm (0.125 inch) (1/8 inch) mm (0.188 inch) (3/16 inch) 4 6mm (0.250 inch) (1/4 inch) 5 1 mm (0.030 inch) (1/32 inch) 9 Reserved for Owner-Specific Designator Note: The allowance values given in the table are nominal values. Unless otherwise specified, minimum values that are 80% of the nominal specified values are permitted. Process Industry Practices Page 10 of 11

13 TECHNICAL REVISION Piping Line Class Designator System December 2015 Table 4 - Joint Construction/Construction Type Symbol A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Description Adhesive or Wrapped RTR (Plastic Pipe Joints) and Flanged Buttweld Small Bore Construction and Buttweld and Flanged Large Bore Construction Cement, Solvent (Plastic Pipe Joints) and Flanged Flanged Only Grooved Large Bore Construction and Threaded Small Bore Construction Heat Fusion (Plastic Pipe Joints) and Flanged (Not Used) Jacketed Construction Compression Fitting Small Bore Construction and Buttweld and Flanged Large Bore Construction Mechanical Joints (Not Used) Push On (Bell and Spigot) Socketweld Small Bore Construction and Buttweld and Flanged Large Bore Construction Threaded Small Bore Construction and Buttweld and Flanged Large Bore Construction Reserved for Owner-Specific Designator Reserved for Owner-Specific Designator Reserved for Owner-Specific Designator Reserved for Owner-Specific Designator Reserved for Owner-Specific Designator Process Industry Practices Page 11 of 11

14

15 Appendix A Cover Sheet / Addendum Form

16 OWNER COMPANY LOGO/HEADER Optional Owner Specification Number Optional Date: mm/yy Cover Sheet / Addendum for Process Industry Practice PNXXXXXXXX PIP Piping Line Class XXXXXXX Addendum No.: X Job No.: X Optional Additions, Deletions, or Modifications listed below form part of this specification: 1. Scope (e.g., fluid service, hazard class, guidance on application, document classification) 2. Design (e.g., pressure/temperature limits, branch table) 3. Materials (e.g., components: pipe, nipples, fittings, flanges, gaskets, bolting) 4. Valves 5. Fabrication, Assembly, and Erection 6. Inspection, Examination, and Testing 7. Cleaning 8. Other Modifications (e.g., other additions, deletions, and/or modifications) 9. Notes (e.g., owner-specific notes numbered ) 10. Related Documents and References

17 Appendix B Sample Cover Sheet

18 XYZ Petrochemical Company, Inc. Engineering Standards Program Cover Sheet for Process Industry Practice PN01CS1S01 PIP Piping Line Class 1CS1S01 Additions, Deletions, or Modifications listed below form part of this specification: 1. Scope 1.1 Process Industry Practice (PIP) PN01CS1S01 is accepted as company piping line class specification 1CS1S01 without additions, deletions, or modifications CS1S01 replaces existing Company specification C This document is classified an Engineering Standard. Deviations must comply with Company Administration Policy , Engineering Standards. 2. Design 2.1 No change 3. Materials 3.1 No change 4. Valves 4.1 No change 5. Fabrication, Assembly, and Erection 5.1 No change 6. Inspection, Examination, and Testing 6.1 No change 7. Cleaning 7.1 No change 8. Other Modifications 8.1 No change 9. Notes 9.1 No change 10. Related Documents and References 10.1 No change

19 Appendix C Sample Addendum

20 ABC Chemical Co. Engineering Standards Piping October 1998 ES PN01CS1S01A Addendum for Process Industry Practice PN01CS1S01 PIP Piping Line Class 1CS1S01 Addendum No.: A Additions, Deletions, or Modifications listed below form part of this specification: 1. Scope 1.1 Process Industry Practice (PIP) PN01CS1S01 is accepted as Company piping line class specification ES PN01CS1S01A with modifications as indicated below. 1.2 This specification covers carbon steel piping for general non-corrosive gas and liquid process service. 1.3 This specification shall not be used in sulfide environments or in other services subject to environmental cracking. 1.4 ES PN01CS1S01A replaces existing Company specification C This document is classified an Engineering Standard. Deviations must comply with Company Administrative Policy , Engineering Standards. 2. Design 2.1 No change 3. Materials 3.1 Threaded connections, NPS 1/2 2, for instrument connections are to be SCH 80 with PTFE emulsion sealant. PTFE tape is not permitted. 3.2 Use NPS 3/4 Class 3000 combination socketweld and threaded bossets for hydrostatic test connections. 3.3 ASTM A53 Gr-B ERW is an acceptable alternate for sizes NPS Valves 4.1 Add Company Index 211 Butterfly Valve - NPS 3 14, Wafer CS body 150 RF, NPS 8 and > GEAR (see Note 700, 701). 4.2 Delete PIP Valve Code BF1CS Add Company Index 22A Ball - NPS 1/4 2, Brass body 600 WOG/125 WSP, F-NPT. 4.4 Delete PIP Valve Code BA1CS06.

21 TECHNICAL REVISION STEERING TEAM BALLOT Piping Line Class Designator System 09/18/ Fabrication, Assembly, and Erection 5.1 No change 6. Inspection, Examination, and Testing 6.1 See PIP PNSC0001 for the fabrication of metallic pipe. 6.2 See PIP PNE00012 for the piping examination and leak testing guide. 6.3 See PIP PNSC0021 for specification for leak test of piping. 7. Cleaning 7.1 See Company Specification Piping, General Cleaning. 8. Other Modifications 8.1 No change 9. Notes 9.1 Note 700: These valves have no flanges but are installed between line flanges with extra length bolts. 9.2 Note 701: Butterfly valves NPS 6 and smaller w/handle; NPS 8 and larger with gear operator. 10. Related Documents and References 10.1 See ES PNCM0001A, Line Class Designator System, for information on the system used for identifying piping line classes and revisions/alterations/additions Attachment: PIP Piping Line Class Material Specification 1CS1S01. Process Industry Practices Page C-2

22 TECHNICAL REVISION STEERING TEAM BALLOT Piping Line Class Designator System 09/18/2015 Appendix D Piping Line Class Designator System Summary Sheet Process Industry Practices Page C-2

23 PIP PIPING LINE CLASS DESIGNATOR SYSTEM (PIP PNCM0001) EXAMPLE NUMBER: 3 CS 1 S 01 First Field: 3 = ASME Pressure Class 300 Second Field: CS = Carbon Steel Base Material Piping System Third Field: 1 = Nominal Corrosion Allowance in mutiples of 1/16" Fourth Field: S = Socketweld Small Bore Const. and Buttweld and Flanged Large Bore Const. Fifth Field: 01 = Sequence Number (first in this piping material/pressure class series) 1ST FIELD - PRESSURE RATING 2ND FIELD - LINE MATERIAL (CONTINUED) 2ND FIELD - LINE MATERIAL (CONTINUED) 2ND FIELD - LINE MATERIAL (CONTINUED) SYMBOL SYMBOL MATERIAL SYMBOL MATERIAL SYMBOL MATERIAL ASME B16.5 or B16.47 Flange Class Carbon and Low-Alloy Steels Misc. Metals, Not Covered Elsewhere Stainless (High-Alloy) Steels CA Impact Tested Carbon Steel MG Gold SA Type 304/304L SS CB Killed Carbon Steel ML Lead SC Type 304H SS CC Low Carbon Steel MS Silver SD Type 316/316L SS CG Galvanized Carbon Steel MT Tantalum SF Type 316H SS CH Killed Carbon Steel, PWHT for Process MY Zirconium + Cb SG Type 317 SS CJ 1-1/4 Cr - 1/2 Mo Alloy Steel MZ Zirconium SH Type 317L SS ASME 16.1 Cast Iron Flange Class CK 2-1/4 Cr - 1 Mo Alloy Steel SJ Type 321 SS CL 5 Cr - 1/2 Mo Alloy Steel Nickel and Nickel Alloys SK Type 321H SS CM 9 Cr - 1 Mo Alloy Steel NA Alloy C-2000 UNS N06200 SL Type 347 SS Reserved for Owner-Specific Rating Designations CN 12 Cr Alloy Steel NB Alloy B2 UNS N10665 SM Type 347H SS 2ND FIELD - LINE MATERIAL MATERIAL CS Carbon Steel NC Alloy C276 UNS N10276 SN Type 904L SS UNS N08904 ND Alloy B UNS N10001 SP 2205 Duplex SS UNS S31803 Iron, Ductile, Malleable, or Cast NE Alloy C4 UNS N06455 SR Type 304 SS SYMBOL DA Ductile Iron, Austenitic NF Alloy C22 UNS N06022 SS Type 304L SS DC Cast Iron, Grey NG Alloy G UNS N06007 ST Type 316 SS Aluminum Alloys DF Ductile Iron, Ferritic NH Alloy B3 UNS N10675 SU Type 316L SS AA Aluminum Alloy 1100, H112 temper DM Malleable Iron NJ Alloy G3 UNS N06985 SV 254 SMO UNS S31254 AB Aluminum Alloy 3003, H112 temper NK Nickel 200 UNS N02200 AC Aluminum Alloy 5052, H32 temper Fiberglass Reinforced Plastics (FRPs) and Resins NL Nickel 201 UNS N02201 Titanium and Titanium Alloys AD Aluminum Alloy 5454, H112 temper FC Carbon Fiber Reinforced Furan NM Alloy 400 UNS N04400 TB Titanium Grade 2 AE Aluminum Alloy 6061, T6 temper FE Glass Fiber Reinforced Epoxy NN Alloy C30 UNS N06030 TC Titanium Grade 3 AF Aluminum Alloy 6063, T1 temper FF Glass Fiber Reinforced Furan NP Alloy 600 UNS N06600 TD Titanium Grade 7 AG Aluminum Alloy 6063, T6 temper FP Glass Fiber Reinforced Polyester NQ Alloy 625 UNS N06625 TE Titanium Grade 12 FV Glass Fiber Reinforced Vinyl Ester NR Alloy 800 UNS N08800 Brass, Bronze, Copper, and Copper Alloys NS Alloy 825 UNS N08825 Reserved for Owner-Specific Designators BA Aluminum-Bronze Non-Metals/Non-Plastics NT Alloy 20 UNS N08020 W_ - Z_ BB Red Brass KA Clay NU Alloy 20Cb-3 UNS N08020 BC Copper, deoxidized pure KB Concrete NV Alloy 20-Mod UNS N RD FIELD - CORROSION / EROSION ALLOWANCE BD Cu-Ni KC Glass NW Alloy 25-6 Moly UNS N08926 SYMBOL ALLOWANCE (NOMINAL) BE Cu-Ni KD Ceramic NX Alloy AL-6XN UNS N zero corrosion allowance BF Cu-Ni (1/16 ) BG Silicon-Bronze Lined or Internally Coated Steel/Iron/Etc. Plastics (other than FRPs) (1/8 ) BT Cast Leaded Tin Bronze LA PFA (Perfluoro Alkoxyalkane copolymer)-lined Carbon Steel PA ABS (Acrylonitrile-butadiene styrene) (3/16 ) LB Cement-lined Ductile Iron PB PB (Polybutylene) (1/4 ) LC Cement-lined Carbon Steel PC CAB (Cellulous acetate-butyrate) 9 Reserved for Owner-Specific Designator LD PTFE (Polytetrafluoroethylene)-lined Ductile Iron PD HDPE (High Density Polyethylene) LE Epoxy-lined Carbon Steel PE LDPE (Low Density Polyethylene) 4TH FIELD - JOINT CONSTRUCTION/CONSTRUCTION TYPE LF FEP (Perfluoro Ethylene-Propylene copolymer)-lined Carbon Steel PF PFA (Perfluoro Alkoxyalkane copolymer) SYMBOL DESCRIPTION LG Glass-lined Carbon Steel PG FEP (Perfluoro Ethylene-Propylene copolymer) A Adhesive or Wrapped RTR (Plastic Pipe Joints) and Flanged LH ECTFE (Ethylene-Chlortrifluoroethylene)-lined Carbon Steel PK PVDF (Polyvinylidene Fluoride) B Buttweld Small Bore Construction & Buttweld and Flanged Large Bore Construction LJ PFA (Perfluoro Alkoxyalkane copolymer)-lined Ductile Iron PP PP (Polypropylene) C Cement, Solvent (Plastic Pipe Joints) and Flanged LK PVDF (Polyvinylidene Fluoride)-lined Carbon Steel PS PVDC (Polyvinylidene Chloride) F Flanged Only LP PP (Polypropylene)-lined Carbon Steel PT PTFE (Polytetrafluoroethylene) G Grooved Large Bore Construction & Threaded Small Bore Construction LR Rubber-lined Carbon Steel PU CPVC (Chlorinated Polyvinyl Chloride) H Heat Fusion (Plastic Pipe Joints) and Flanged LS PVDC (Polyvinylidene Chloride)-lined Carbon Steel PV PVC (Polyvinyl Chloride) J Jacketed Construction LT PTFE (Polytetrafluoroethylene)-lined Carbon Steel L Compression Fitting Small Bore Const. & Buttweld and Flanged Large Bore Const. LV PVC (Polyvinyl Chloride)-lined Carbon Steel M Mechanical Joints P Push On (Bell and Spigot) S Socketweld Small Bore Const. & Buttweld and Flanged Large Bore Const. T Threaded Small Bore Construction & Buttweld and Flanged Large Bore Construction V - Z Reserved for Owner-Specific Designator