DRG(Applied Practices Piping)

SIZE

DWG NO

SH

351A3700

A

1

REV

AA REVISIONS

THIRD ANGLE PROJECTION

REV AA THIS DOCUMENT SHALL BE REVISED IN ITS ENTIRETY. ALL SHEETS OF THIS DOCUMENT ARE THE SAME REVISION LEVEL AS INDICATED. REVISION DESCRIPTION IS FULLY STATED ON FIRST SHEET OF DOCUMENT

THIS DRAWING TO BE REVISED IN MICROSOFT WORD ONLY. THE SOURCE FILE IS STORED IN A SECURE DATABASE

DESCRIPTION Sheet 1: Removed complementary document 248A4158 from the list. Sheet 19: changed the reference for BOLT TO NUT TIGHTENING from Complementary Documents Documents Item 8 to Table V. Sheet 21: inserted 248A4158 Table 1, General Torque Requirements for Non-Structura N on-Structurall Flanges. - Added ASTM bolt identifiers, eliminated EMPIS material specs - Indicated that SAE Gr.8 bolts (ASTM A354 Gr. BD) should be used for SAE Code 61/62 4 bolt o-ring flanges Sheet 22: moved Matchmarking Requirements Requirements (for Flexible Metal Hoses) to Sh.22 Sheet 23: renumbered RevZ Sh.22 to 23 Sheet 24: renumbered RevZ Sh.23 to 24 Sheet 25: renumbered RevZ Sh.24 to 25 Sheet 26: renumbered RevZ Sh.25 to 26

DATE 22DEC10

APPROVED SEE PLM

ECO-0015745 DCI-10029094 M O'CONNOR

© COPYRIGHT 1994 GENERAL ELECTRIC COMPANY PROPRIETARY INFORMATION - THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF GENERAL ELECTRIC COMPANY AND MAY NOT BE USED OR DISCLOSED TO OTHERS, EXCEPT WITH THE WRITTEN PERMISSION OF GENERAL ELECTRIC COMPANY. UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE IN INCHES TOLERANCES ON: 2 PL DECIMALS + 3 PL DECIMALS + ANGLES + FRACTIONS +

SIGNATURES DRAWN

JEFF F. KING CHECKED

JAMES L. DUNAWAY ENGRG

ROBERT MCLEOD ISSUED

C. OWENBY QA

H. N. MILDE

APPLIED PRACTICES

14

EXPANSION JOINT PROCUREMENT SPEC

729A9174

13

HOSE, FLEXIBLE METAL PROCUREMENT SPEC

372A5119

12

P&ID SYMBOLS & NOMENCLATURE NOMENCLATUR E

213D1781

11

MARKING, PRESERVATION, PRESERVATION , PACKAGING

P23E-AL-0255 P23E-AL-025 5

10

CLEANLINESS CLEANLIN ESS REQUIREMENTS

362A2412

9

ALKYD PRIMER SPEC

P6A-AL-0007

8

NOT USED

NOT USED

7

ISOLATION CLAMPS

362A2495

6

ANTI-SEIZE COMPOUND

287A1397

5

WELDED FAB OF GT PPG

P8A-AG3

4

PROTECTIVE OIL CTG

P6C-AG5

3

SURFACE PREP & COATING APPL

P4A-AL-1801

2 1

WELDING GEN SPEC MACH & INSTL-GROOVE INSTL-GROOVE PPG INSTRUCTION

P8A-AG1 215A3050

IT.

NOMENCLATURE NOMENCLATURE LIST OF COMPLEMENTARY DOCUMENTS

DATE

94-05-09

GENERAL ELECTRIC COMPANY

g

GE Power Generation GREENVILLE, SC

94-05-18 94-05-18

APPLIED PRACTICES-PIPING

94-06-20 94-06-20

FIRST MADE FOR:GAS SIZE

348A9200

IDENT

CAGE CODE

TURBINE DWG NO

A

SIM TO:NONE

SCALE

SHEET

351A3700 1 of 26

SIZE

DWG NO

SH

351A3700

A

2

REV

AA

SCOPE

THE PURPOSE OF THIS DOCUMENT IS TO DEFINE ACCEPTED PIPING PRACTICES AND TO DEFINE REQUIREMENTS NOT SPECIFICALLY ADDRESSED BY THE PIPING DESIGN DRAWINGS OR DESIGN SPECIFICATIONS. THIS DOCUMENT IS TO BE APPLIED WHEN CALLED FOR DIRECTLY ON ENGINEERING DOCUMENTATION AND IN CONJUNCTION WITH GENERAL MACHINING APPLIED PRACTICE 348A9200. NOTE: THE PHRASE "UNLESS OTHERWISE SPECIFIED" APPLIES TO ALL SECTIONS OF THIS DOCUMENT. 1.

WELDING

1.1

PIPE WELDING SHALL BE IN CONFORMANCE WITH ANSI B31.3 AS DESCRIBED BY ITEM 5. SEE TABLE IV FOR ANSI B31.3 SERVICE CATEGORY OF INDIVIDUAL PIPING SYSTEMS BY ML ITEM NO. THIS ML ITEM NO. APPEARS NEAR THE DRAWING TITLE.

1.2

CARBON AND/OR STAINLESS STEEL AND/OR INCONEL AND/OR CR-MO-ALLOY PIPE AND FITTINGS WELD JOINTS (TO SAME MATERIAL) SHALL BE PER ITEM 5, APPLICABLE FIGURE OF P1, P6-P8, P10, P12, P14 AND P19 (TYPE OF JOINT DETERMINES APPLICABLE FIGURE; SEE P8A-AG3 APPENDIX II & III). WELD FILLER METAL DESIGNATORS MUST BE SPECIFIED ON DRAWINGS. EXAMPLES OF MATERIALS & DESIGNATORS ARE LISTED BELOW. PIPE MAT’L SPEC (SERIES) B4A39 (CARBON) B50A696 (TYPE 304L) B50A634 (TYPE 316L) B7A120 (TYPE 321) B14H96 (INCONEL 625) B5F46 (P91)

P8A-AG3 AB AE-L AH-L AU BI BK

1.3

THE NOTATION T DENOTES AN OIL TIGHT WELD. DYE PENETRANT INSPECTION OF THIS WELD IS REQUIRED AND SHALL BE PERFORMED PER ITEM 2.

1.4

WELDED JOINTS ON PIPING FABRICATIONS AND ARRANGEMENTS SHALL BE IDENTIFIED BY WELDING SYMBOLS CREATED IN ACCORDANCE WITH AWS A2.4. WELDED JOINTS ON OLDER DRAWINGS MAY HAVE BEEN IDENTIFIED WITH AN ‘X’ INSTEAD OF WELDING SYMBOLS.

1.5

PIPING SUPPLIER WILL IDENTIFY TACK WELDS BY USING AN ADHESIVE BACKED TAPE INSCRIBED WITH THIS WORDING: “TACK WELD ONLY / FIELD FIT-UP REQUIRED”


g

DRAWN ISSUED

GE Power Generation

GREENVILLE, SC

JEFF F. KING 94-05-09 C. OWENBY 94-06-20

SIZE

A SCALE

CAGE CODE

DWG NO

351A3700 SHEET

2

SIZE

DWG NO

SH

351A3700

A

3

REV

AA

THIS TAPE SHALL BE POSITIONED IN CLOSE PROXIMITY TO TACK WELDED AREAS. PRE-PRINTED TAPE MAY BE PURCHASED FROM DECKER TAPE PRODUCTS TYPE 150RCP OR EQUIVALENT. 2.

FINISHES

2000 2.1

ALL PIPE CUTS SHALL BE

2.2

ALL PIPE FITTINGS SHALL BE UNPAINTED.

2.3

NO PAINT IS TO BE APPLIED TO FINISHED PIPE FAB PRIOR TO FINAL ASSEMBLY, UNLESS THE PIPING WILL BE PLACED IN A SUMMARY SHEET CONTAINER (GAS TURBINE MANUFACTURING FACILITY), OR WILL BE SENT DIRECTLY TO SITE (TYPICALLY PIPING VENDOR). WHEN SUMMARY SHEET OR MATERIAL SHIPPED DIRECT PIPING IS MADE, IT WILL BE PAINTED PER ITEM 9, UNLESS SPECIFIED DIFFERENTLY, AFTER THE APPROPRIATE CLEANING CYCLE. THIS APPLIES TO CARBON STEEL PIPING ONLY.

2.4

CARBON STEEL AND CHROME ALLOY PIPING SHALL BE CLEANED PER ITEM 3, SP8 (PICKLING) FOLLOWING THE FABRICATION PROCESS. EXCEPTION IS TAKEN TO ITEM 3, SP8, SUB-SECTION 5.1.2, W HERE SP6 (COMMERCIAL BLAST CLEANING) AND SP7 (BRUSH OF BLAST CLEANING) SHALL NOT BE USED AFTER FABRICATION HAS BEGUN AND PRIOR TO PICKLING. INSIDE SURFACES AND PIPE THREADS, IF ANY, ARE THEN TO BE COATED PER ITEM 4. ALTERNATE METHODS OF CLEANING ARE NOT ACCEPTABLE UNLESS APPROVED BY GE ENGINEERING AND SOURCING.

2.5

STAINLESS STEEL PIPING SHALL BE CLEANED PER ITEM 3, SP1 (SOLVENT CLEANING) OR SP8(PICKLING). PICKLED(PASSIVATED) STA INLESS STEEL SHALL BE THOROUGHLY RINSED WITH CLEAN WATER OF ALL ACID RESIDUE AND THOROUGHLY DRIED W ITH CLEAN AIR. FOLLOWING THE FABRICATION PROCESS. ANY FORM OF GRIT BLASTING FOR STAINLESS STEEL PIPING IS STRICTLY PROHIBITED. ALTERNATE METHODS OF CLEANING ARE NOT ACCEPTABLE UNLESS APPROVED BY GE ENGINEERING AND SOURCING.


g

DRAWN ISSUED

GE Power Generation

GREENVILLE, SC


MINIMUM.

SIZE

A SCALE

CAGE CODE

DWG NO

351A3700 SHEET

3

SIZE

DWG NO

SH

351A3700

A

3.

4

REV

AA

STAMPING

STAMPING IS REQUIRED ON ALL PIPING ASSEMBLIES, PIPING COMPONENTS, PIPE SUPPORTS, AND PIPE SUPPORT STRUCTURES.

STAMP INDIVIDUAL FABRICATION WITH GE DRAWING NUMBER WITH PART OR GROUP NUMBER AND DRAWING REVISION LETTER. STAMP PURCHASE ORDER NUMBER & SUPPLIERS IDENTIFICATION CODE. STAMPING OF GAS TURBINE SHOP ORDER NUMBER MAY BE REQUIRED PER PURCHASE ORDER OR SHOP PLANNING. USE .125 LETTERS APPLIED TO MIDDLE OF FABRICATION USING CONTRASTING COLOR TO HIGHLIGHT LOCATION. IF ANY NONDESTRUCTIVE EXAMINATION IS PERFORMED, INDICATE BY SUPPLEMENTAL STAMP. METAL TAGS MAY BE USED ON FABS TOO SMALL FOR STAMPING. STAMPING SHALL BE BY MECHANICAL METHODS ONLY WHERE A PERMANENT INDICATION IS LEFT IN THE METAL.

4.

TOLERANCES

4.1

ALLOWABLE TOLERANCES FOR PIPE THREADS SHALL BE PER TABLE 1. ALL PIPE THREADS ARE TO MEET AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) B1.20.1 AND ARE TO BE CHECKED WITH THE CORRECT WORKING RING OR PLUG GAGE. ALLOWABLE TOLERANCE WILL BE PLUS OR MINUS ONE TURN. ALL PIPE TAPPED HOLES SHOULD BE REAMED BEFORE TAPPING WITH A REAMER HAVING A TAPER OF 0.75 INCH PER FOOT. WHEN ASSEMBLING JOINTS, USE PROPER THREAD SEALANT, ENSURE PROPER THREAD ENGAGEMENT AND PROPER HAND TIGHT ENGAGEMENT PRIOR TO FINAL WRENCH MAKE-UP OF JOINT.


g

DRAWN ISSUED

GE Power Generation

GREENVILLE, SC


SIZE

A SCALE

CAGE CODE

DWG NO

351A3700 SHEET

4

SIZE

A

DWG NO

SH

351A3700

5

REV

AA

AMERICAN STANDARD TAPER PIPE THREADS


g

DRAWN ISSUED

GE Power Generation

GREENVILLE, SC


SIZE

A SCALE

CAGE CODE

DWG NO

351A3700 SHEET

5

SIZE

DWG NO

SH

351A3700

A

REV

6

AA

TABLE I

L E A Z I N I S E M O P I N P

0.062 0.125 0.250 0.375 0.500 0.750 1.000 1.250 1.500 2.000 2.500 3.000 3.500 4.000 5.000 6.000 8.000

R F E O P S R D E A B E M R H U H C N T N I

27 27 18 18 14 14 11.5 11.5 11.5 11.5 8 8 8 8 8 8 8

T N F T H E O G M E H I - G T T G D A N N G E A N L H E

0.160 0.180 0.200 0.240 0.320 0.339 0.400 0.420 0.420 0.436 0.682 0.766 0.821 0.844 0.937 0.958 1.063

0.312 0.405 0.540 0.675 0.840 1.050 1.315 1.660 1.900 2.375 2.875 3.500 4.000 4.500 5.563 6.625 8.625


g

DRAWN ISSUED

GE Power Generation

GREENVILLE, SC


R L S O ) L I I S F G R H L N I ’ M D T ( W O T . L A P A A E A I L M T D A R

R E E E D I T P E I S M T P U A I F O D O

0.242 0.328 0.422 0.562 0.688 0.891 1.125 1.469 1.719 2.188 2.594 3.250 3.750 4.250 5.250 6.250 8.250

SIZE

A SCALE

CAGE CODE

L L I R H 0 D T 5 P P 2 1 A E . T D +

0.594 0.594 0.781 0.813 1.031 1.031 1.250 1.281 1.313 1.594 1.844 1.906 2.000 2.062 2.188 2.313 2.500

E L O E H . G D A E I R F D A O M L D A N I T N E M A E R

E L O . E H A I G F D D R O E . A M X L D A A T N E M A E R

0.251 0.343 0.442 0.579 0.717 0.927 1.164 1.508 1.747 2.221 2.654 3.281 3.781 4.281 5.341 6.398 8.392

0.256 0.348 0.449 0.586 0.726 0.936 1.175 1.519 1.758 2.232 2.669 3.296 3.796 4.296 5.356 6.403 8.407

DWG NO

351A3700 SHEET

6

SIZE

DWG NO

SH

351A3700

A

7

REV

AA

4.2

CUTTING AND BENDING TOLERANCES

4.2.1

UNLESS OTHERWISE SPECIFIED ON THE APPLICABLE DRAWING, ALL BENDS ARE TO BE CONSIDERED 90°.

4.2.2

UNLESS OTHERWISE SPECIFIED ON APPLICABLE DRAWING, ALL PIPE BENDS SHALL BE 2D (I.E.: AT A RADIUS EQUAL TO 2X THE PIPE NOMINAL DIAMETER; 2.00 PIPE EQUALS 4.00 R)

4.2.3

ALLOWABLE TOLERANCES FOR CUTTING, BENDING AND FABRICATION OF PIPE RUNS SHALL BE PER TABLES II AND FIGURES 1 & 2.

4.2.4

FOR 1 1/2D FITTINGS AND 2D BENDS PIPE OVALITY SHALL NOT EXCEED 8% USING FORMULA: MAX OD OF PIPE - MIN OD OF PIPE X 100 ACTUAL OD OF PIPE ON THE STRAIGHT FOR BENDS GREATER THAN 2D: PIPE OVALITY SHALL NOT EXCEED 15% USING FORMULA ABOVE.

4.2.5

FOR ALL BEND RADII INCLUDING 1 1/2D,2D AND BENDS GREATER THAN 2D,WALL THINNING SHALL NOT EXCEED 25% USING FORMULA: MAX % = THINNING

ACTUAL THICKNESS ON STRAIGHT-MIN THICKNESS ACTUAL THICKNESS ON STRAIGHT

X 100

4.2.6

SURFACE CONDITIONS - CRACKS, WRINKLES AND KINKS ARE NOT ACCEPTABLE IN THE BENT PORTION OF A PIPE. DIE MARKS, CUTS, SCRATCHES AND NICKS THAT ARE IN EXCESS OF 5% OF THE NOMINAL PIPE WALL THICKNESS SHOULD BE REMOVED BY BURNISHING. IN THIS OPERATION, THE WALL THICKNESS SHALL NOT BE REDUCED BY MORE THAN 12.5%.

4.2.7

WELDED PIPE BENDING WHEN BENDING WELDED PIPE IT IS RECOMMENDED TO BEND THE PIPE ABOUT THE NEUTRAL AXIS . IF WHE BENDING DUE TO CONFIGURATION THEFABRICATION DOES NOT ALLOW BENDING ABOUT THE NEUTRAL AXIS BENDING ABOUT THE NON-NEUTRAL AXIS IS ACCEPTABLE.


g

DRAWN ISSUED

GE Power Generation

GREENVILLE, SC


SIZE

A SCALE

CAGE CODE

DWG NO

351A3700 SHEET

7

SIZE

A

DWG NO

SH

351A3700

8

REV

AA

FIGURE 1

FIGURE 2


g

DRAWN ISSUED

GE Power Generation

GREENVILLE, SC


SIZE

A SCALE

CAGE CODE

DWG NO

351A3700 SHEET

8

SIZE

DWG NO

SH

351A3700

A

9

REV

AA TABLE II

BENDING TOLERANCES H T G N E ) L T E E P I E P F (

UP T0 3 3 T0 6 OVER 6

L L H A T R G E N V E O L

“U” ± .125 ± .125 ± .125

M I H T R G E N T E N I L

“V” ± .125 ± .125 ± .125

E R A U Q F S O

“W” ± 1.00°

S S E N T A L F

Y T I R A L U G N A

L E L L A R A P

“X” ± .062 ± .094 ± .125

“Y” ± .062 ± .094 ± .125

“Z” ± .50°

4.3

FABRICATION TOLERANCES

4.3.1

ALLOWABLE TOLERANCES FOR ASSEMBLY OF PIPE RUNS SHALL BE PER TABLE III AND FIGURE 3.

4.3.2

WELDED FLANGES SHALL BE ORIENTED IN THE FOLLOWING MANNER: NUMBER OF HOLES IN FLANGE 4 8 12 16 20 24 28 32 36

A 45.00° 22.50° 15.00° 11.25° 9.00° 7.50° 6.43° 5.62° 5.00°

4.3.3 FLANGE BOLT HOLE ORIENTATION FOR PIPE FABRICATIONS CONSTRUCTED USING SECTION 4.3.2 SHALL BE ORIENTED AS DESCRIBED HEREIN TO THE VERTICAL AND HORIZONTAL CENTERLINE OF THE PIPING AND NOT TO THE EQUIPMENT CENTERLINES UNLESS OTHERWISE SPECIFIED ON FABRICATION DRAWINGS. 4.3.4 FLANGE ORIENTATION REQUIRED BY 4.32 AND 4.3.3 ABOVE IS COMMONLY KNOWN AS “2-HOLE”. DEVIATIONS FROM 2-HOLE IS O NLY PERMITTED WHEN DEFINED OTHERWISE ON THE PIPING DESIGN DRAWING.


g

DRAWN ISSUED

GE Power Generation

GREENVILLE, SC


SIZE

A SCALE

CAGE CODE

DWG NO

351A3700 SHEET

9

SIZE

DWG NO

SH

351A3700

A

4.3.5

4.3.6

10

REV

AA

SET THE GAP AT THE BOTTOM OF SOCKET JOINTS AT .12 NOMINAL TO GUARANTEE A MIN. OF .03 AFTER WELDING. FITUP ADJUSTMENT OF FABRICATIONS FIELD OR FACTORY PIPING ASSEMBLY ADJUSTMENT IS USUALLY ACHIEVED BY THE TACK WELDING OF FLANGES AND/OR BUTT WELD JOINTS ON THE INDIVIDUAL FABRICATION. THESE TEMPORARY WELDS WILL BE SHOWN CLEARLY ON THE INDIVIDUAL FABRICATION DRAWING.

FIGURE 3


g

DRAWN ISSUED

GE Power Generation

GREENVILLE, SC


SIZE

A SCALE

CAGE CODE

DWG NO

351A3700 SHEET

10

SIZE

DWG NO

SH

351A3700

A

11

REV

AA TABLE III

FABRICATION TOLERANCES H T G N E ) L T E E P I E P F (

UP T0 3 3 T0 6 OVER 6

4.4

L L H A T R G E N V E O L

“U” ± .125 ± .125 ± .125

M I H R T E G T N E N I L

“V” ± .125 ± .125 ± .125

E R A U Q F S O

“W” ± 1.00°

S S E N T A L F

Y T I R A L U G N A

L E L L A R A P

“X” ± .062 ± .094 ± .125

“Y” ± .062 ± .094 ± .125

“Z” ± .50°

VERIFICATION OF PIPING RING MANIFOLD ASSEMBLIES

4.4.1

PIPING RING MANIFOLD ASSEMBLIES ARE DEFINED AS CIRCULAR OR POLYGONAL SHAPED PIPING ASSEMBLIES THAT ENCIRCLE THE GAS TURBINE EITHER FULLY OR PARTIALLY AS VIEWED ON THE PIPING ARRANGEMENT DRAWING END OR FRONT VIEW.

4.4.2

PIPING RING MANIFOLDS SHALL BE ASSEMBLED AND THE FIT –UP VERIFIED IN A STRAIN FREE CONDITION BY THE SUPPLIER. CENTERLINE HORIZONTAL & VERTICAL DIMENSIONS SHALL BE MEASURED AND VERIFIED TO CONFORM TO THE PIPING ARRANGEMENT DRAWING CORRESPONDING DIMENSIONS WITHIN A TOLERANCE OF +/-0.5 INCH (12MM).

4.4.3

FLEXIBLE METAL HOSES SHOULD NOT BE INSTALLED ON THE PIPING RING MANIFOLD ASSEMBLIES DURING THE DIMENSIONAL VERIFICATION PROCESS.

4.4.4

A MINIMUM OF FOUR (4) CENTERLINE DIMENSIONS SHALL BE MEASURED, RECORDED, AND SUBMITTED TO THE GE SOURCING QUALITY REPRESENTATIVE FOR APPROVAL PRIOR TO RELEASE FOR SHIPMENT. THE CENTERLINES SHALL BE REASONABLY SPACED TO VERIFY THE ENTIRE RING ASSEMBLY.

4.4.5

PIPING OTHER THAN RING MANIFOLDS IS NOT REQUIRED TO BE ASSEMBLED AND VERIFIED BY THE SUPPLIER UNLESS SPECIFICALLY ADDRESSED ON THE PIPING DESIGN DRAWINGS.

5.

ENGINEERING DOCUMENTATION

5.1

THE PRACTICE FOR HAND GENERATED DRAWINGS IS TO DELINEATE PIPING FABRICATIONS AND ASSEMBLY DRAWINGS BY SINGLE LINES REPRESENTING THE CENTERLINE OF PIPING FEATURES, UNLESS OTHERWISE SPECIFIED. CAD GENERATED DRAWINGS TYPICALLY DO NOT DEPICT SINGLE LINE PIPE AND PIPE FEATURE REPRESENTATIONS. GENERAL ELECTRIC COMPANY

g

DRAWN ISSUED

GE Power Generation

GREENVILLE, SC


SIZE

A SCALE

CAGE CODE

DWG NO

351A3700 SHEET

11

SIZE

DWG NO

SH

351A3700

A

5.2

REV

12

AA

GRAPHICAL SYMBOLS FOR PIPE FITTINGS AND VALVES SHALL BE PER ITEM 12, UNLESS OTHEWISE SPECIFIED.

TABLE IV

ALL PIPING LINE ITEMS SHALL BE INSPECTED PER P8A-AG3 CODE N (NORMAL FLUID SERVICE) UNLESS OTHERWISE STATED BELOW.

SYSTEM COOLING WATER TURB WSHG & CLEANING WATER CLG MODULE CONTROL AIR, DIESEL EXHAUST, CMPT PRSRZ LO EDUCTOR COOLING & SEALING AIR PIPE SUPPORT ELEMENTS AND PIPE ATTACHMENTS PIPE SUPPORT STRUCTURES, FRAMES,BENTS

Y R O G E T A C

ML ITEMS 0914, 0915, 0927, 0928, 0956, 0963, A076 0975, 0973 0950, 0951, 0952, 0953, 0960, A081 0976, 0979 1610

D D D

0913, 0949, 0957, 0966, A044, 0936, 0967 1605, A075, 1623, 0557

D

0972, 0982

D

ALL – SEE P8A-AG3

--

ALL

AWS D1.1

D=

ANSI B31.3 FLUID SERVICE CATEGORY D -PRESSURE LESS THAN 150 PSIG. TEMP LESS THAN 366°F. FLUID IS NOT FLAMMABLE OR TOXIC. SEE P8A–AG3 PARA. 6.1.5.

N=

ANSI B31.3 NORMAL FLUID SERVICE -PRESSURE AND/OR TEMPERATURE MAY EXCEED CATEGORY D AND MAY BE FLAMMABLE-FLUID CONDITIONS NOT SUBJECT TO RULES FOR CATEGORY M OR HIGH PRESSURE FLUID SERVICE AND NOT SUBJECT TO CYCLIC CONDITIONS. SEE P8A–AG3 PARA 6.1.4. GENERAL ELECTRIC COMPANY

g

DRAWN ISSUED

GE Power Generation

GREENVILLE, SC


SIZE

A SCALE

CAGE CODE

DWG NO

351A3700 SHEET

12

SIZE

DWG NO

SH

351A3700

A

13

6.

PIPE FITTINGS

6.1

UNIONS

REV

AA

CONVENTIONAL PIPE UNIONS ARE COMP OSE D OF THREE (3) PIECES AND MAY BE IDENTIFIED THUSLY: (2) THREADED HALF OR THREADED END

(1) NUT OR RING

PREFERRED GTD REFERENCE:

(3) RING HALF OR NUT END

UNIONS MUST BE RETAINED IN THEIR ASSEMBLED STATE; I.E., AS A MATCHED PART(NUT,THREADED HALF & RING HALF). SCREWED PIPE -

ENTIRE UNIONS ACCOMPANIES THE PIPING SEGMENT.

WELDED PIPE -

FASTEN ONE SI DE AT FABRICATION, MAINTAIN AS A UN IT (NUT,THREADED HALF,RING HALF). FASTEN REMAINING SIDE AT ASSEMBLY.

UNIONS IN VERTICAL PIPE RUNS MUST BE ASSEMBLED WITH THE RING HALF IN THE UPPER POSIT ION, TO PREVENT THE NUT FROM FALLING FREE WHEN DISASSEMBLED.


g

DRAWN ISSUED

GE Power Generation

GREENVILLE, SC


SIZE

A SCALE

CAGE CODE

DWG NO

351A3700 SHEET

13

SIZE

DWG NO

SH

351A3700

A

6.2

14

REV

AA

PLACEMENT OF STOPS TO LIMIT LATERAL MOVEMENT OF SLIP JOINT PIPE COUPLINGS.


g

DRAWN ISSUED

GE Power Generation

GREENVILLE, SC


SIZE

A SCALE

CAGE CODE

DWG NO

351A3700 SHEET

14

SIZE

DWG NO

SH

351A3700

A

15

REV

AA

6.3

PIPE PLUGS SHALL BE LOCKED IN PLACE PER THE FOLLOWING METHOD WHEN SPECIFICALLY REQUIRED ON THE PIPING DESIGN DR AWINGS.

6.4

ORIFICE FLANGES AT ASSEMBLY OF ORIFICE FLANGE THE CARBON STEEL JACKING BOLTS ARE TO BE LOCATED 180 DEGREES APART. THIS ORIENTATION WILL BE DELINEATED AT THE TOP LEVEL ARRANGEMENT AND AT THE FABRICATION LEVEL. SEE FIGURE BELOW:


g

DRAWN ISSUED

GE Power Generation

GREENVILLE, SC


SIZE

A SCALE

CAGE CODE

DWG NO

351A3700 SHEET

15

SIZE

DWG NO

SH

351A3700

A

6.4

16

REV

AA

(CONT’D) AFTER THE ORIFICE FLANGES ARE WELDED TO THE PIPE, DRILL A HOLE THRU THE PIPE USING THE PRESSURE TAP HOLES IN THE ORIFICE FLANGE AS A GUIDE. THE HOLE SIZE IS BASED PER THE FOLLOW ING FIGURE:

6.5

INTEGRALLY EXTENDED WELDOLET INTEGRALLY EXTENDED WELDOLET MAY BE SUBSTITUTED FOR A WELDOLET AND PIPE WHEN ALL THE FOLLOWING ARE MET: •

•

•

HEADER TO BRANCH DIMENSIONS SHALL BE IN FULL COMPLIANCE WITH MSS SP97, ANSI/ASME B16.11 AND FABRICATION DRAW ING WELDOLET OUTSIDE DIAMETER. EQUAL NOMINAL SIZE, PRESSURE CLASS AND EQUIVALENT MATERIAL PROPERTIES AS THE FABRICATION DRAWING PIECE PARTS. IF THE WELDED INTEGRALLY EXTENDED WELDOLET FITTINGS NEED SHORTENING OR LENGTHENING TO MEET ORIGINAL DESIGN CONDITIONS, THE APPROPRIATE WELD PREPARATION & WELD(S) SHALL BE PERFORMED.

7.

FABRICATION EXCEPTIONS

7.1

SUBSTITUTION OF ANY SPECIFIED BEND OR FITTING IS NOT PERMITTED WITHOUT GE DESIGN ENGINEERING AND SOURCING APPROVAL.


g

DRAWN ISSUED

GE Power Generation

GREENVILLE, SC


SIZE

A SCALE

CAGE CODE

DWG NO

351A3700 SHEET

16

SIZE

DWG NO

SH

351A3700

A

17

REV

AA

7.2

ALL FITTINGS USED MUST COMPLY WITH ASME/ANSI B16.9, ASTM A403, WP-WX CONSTRUCTION FOR STAINLESS STEELS AND ASTM A234, WPB SEAMLESS CONSTRUCTION FOR CARBON STEELS.

7.3

WHEN TWO BENDS COULD BE MANUFACTURED BUT, THE MINIMUM DISTANCE BETWEEN TANGENT POINTS IS LESS THAN MACHINE CAPABILITY, A SINGLE OPEN ROOT BUTT WELD JOINT, IN COMPLIANCE WITH ITEM 6 FIG. 10, MAY BE APPLIED. THE POSITION OF THE OPEN ROOT BUTT W ELD JOINT MUST NOT FALL WITHIN THE ENVELOPE OF A BRANCH F ITTING LOCATED BETWEEN THE BENDS, INCLUDING THE BRANCH FITTING WELD.

7.4

WHEN WELDED PIPE IS USED IN THE MANUFACTURE OF FABRICATIONS, ALL BENDS APPLIED TO THE PIPE, REGARDLESS OF SIZE, WILL HAVE THE WELD SEAM POSITIONED IN THE NEUTRAL AXIS OF THE BEND. E MPLOYMENT OF THIS PROCEDURE WILL ASSIST IN AVOIDING W ELD DEFORMATION AND EXCESSIVE WALL THINNING/OVALITY ISSUES.

7.5

SHORT RADIUS ELBOWS CALLED FOR ON A FABRICATION DRAWING WILL BE SUPPLIED AS SPECIFIED BY GENERAL ELECTRIC DOCUMENTATION.

7.6

SUBSTITUTION OF ANY SPECIFIED PIPE OR FITTING WALL THICKNESS OR SCHEDULE IS NOT PERMITTED WITH OUT GE DESIGN ENGINEERING AND SOURCING APPROVAL.

7.7

AUSTENITIC STAINLESS STEEL ASTM A403 FITTINGS WITH WELDED BRANCH ATTACHMENTS (EG: THREADOLET, WELDOLET, ELBOWLET) SHALL BE STAMPED PER MSS-SP25. THIS DOES NOT INCLUDE RING MANIFOLDS. AUSTENITIC STAINLESS STEEL COLD BENT PIPE FABRICATIONS (EXCEPT RING MANIFOLDS) CONTAINING WELDED BRANCH ATTACHMENTS (EG: THREADOLET, WELDOLET, ELBOWLET) SHALL BE POST WELD HEAT TREATED. THESE FABRICATIONS SHALL ALSO BE STAMPED FOR TRACEABILITY (HEAT LOTS NUMBER). HEAT TREATMENT SHALL FOLLOW THE REQUIREMENTS OF ASTMA403 SECTION 6 AND SHALL BE ANNEALED TO A MINIMUM TEMPERATURE OF 1900F.

7.8

INSTALLATION OF “LETS” USE "LETS" AS A TE MPLATE TO ESTABLISH THE SIZE OF HOLE FOR BRANCH OUTLET. WELD "LETS" IN ACCORDANCE WITH ITEM 5 FIG. P14. CUTTING OF HOLES IN ADVANCE IS ADVISED ONLY IF O NE BRAND OF "LETS" IS STOCKED (SINCE DIMENSIONS VARY SIGNIFICANTLY).

8.

GROOVED PIPING

8.1

ALL GROOVED PIPING SHALL BE MACHINED AND INSTALLED PER ITEM 1.


g

DRAWN ISSUED

GE Power Generation

GREENVILLE, SC


SIZE

A SCALE

CAGE CODE

DWG NO

351A3700 SHEET

17

SIZE

DWG NO

SH

351A3700

A

REV

18

AA

9.

ANGLE NOTATION

9.1

ALL FRACTION S OF ANGLES ARE INDICATED DECIMALL Y. 90.50°(DECIMAL ) CALLOUT MEANS 90°30’ (ANGULAR ITY). TO CALCULATE DECI MAL DEGREES DIVIDE DEGREE MINUTES BY 60. THUS 38 MINUTES = 38/60 OR .633 DEGREES.

10.

SEALING/ANTISEIZE COMPOUNDS

10.1

SEALING COMPOUND

10.1.1

PIPE SEALANT ITEM 6 REF DWG LIST USED ON ALL THREADED CONNECTIONS INCLUDING CAST IRON CASTINGS AND STAINLESS STEEL THREADED PIPING OR TUBING.

10.1.2

PTFE OR TEFLON ® TAPE IS PROHIBITED.

10.2

METHOD OF APPLICATION

10.2.1

PIPE THREAD MUST BE CLEAN AND FREE OF FOREIGN MATERIAL BEFORE APPLYING SEALANT/ANTISEIZE COMPOUND.

10.2.2

APPLY TO THE MALE THREADS SO THAT THE FIRST THREAD IS FREE OF ANY COMPOUND. IT IS EXTREMELY IMPORTANT THAT THE COMPOUND DOES NOT EXTEND OVER THE END OF THE FITTING. WHEN A FITTING IS REMOVED, THE FEMALE THREADS SHALL BE CLEANED TO REMOVE ALL LOOSE PARTICLES OF COMPOUND.

11.

ISOLATION CLAMPS

ISOLATION CLAMPS PER ITEM 8 SHALL BE USED TO SEPARATE FLEXIBLE METAL HOSES WHERE NO OTHER MEANS OF ACHIEVING A MINIMUM CLEARANCE OF .50 INCH IS POSSIBLE.


g

DRAWN ISSUED

GE Power Generation

GREENVILLE, SC


SIZE

A SCALE

CAGE CODE

DWG NO

351A3700 SHEET

18

SIZE

DWG NO

SH

351A3700

A

12.

19

REV

AA

CRITICAL TO QUALITY REQUIREMENTS

A PIPING DRAWING MAY ADDRESS CRITICAL TO QUALITY (CTQ) REQUIREMENTS. IF SO, SPECIFIC SUPPLIER REQUIREMENTS SHALL BE DEFINED ON THE PIPING DESIGN DRAWING. 13.

SPIRAL WOUND GASKET BOLT-UP SEQUENCE

TO ACHIEVE AN EFFECTIVE SEAL, IT IS A REQUIREMENT TO APPLY AN EVEN COMPRESSIVE FORCE. IN ORDER TO ACHIEVE THIS, A VERY DEFINITE BOLT-UP PROCEDURE MUST BE FOLLOWED WHEN TIGHTENING A FLANGE USING TORQUE METHODS. BOLT TO NUT TIGHTENING TO BE FINAL TIGHTENED IN ACCORDANCE WITH THE VALUES SHOWN IN TABLE V. THIS TIGHTENING PROCEDURE IS DETAILED AS FOLLOWS: 1. INSTALL THE GASKET ON THE FLANGE SEATING SURFACE AND BRING THE MATING FLANGE IN CONTACT WITH THE GASKET. 2. FLANGE ALIGNMENT AND PARALLELISM IS CRITICAL TO A LEAK FREE ASSEMBLY. FLANGED JOINTS SHALL BE ALIGNED AS DESCRIBED IN (i), (II), AND (iii) BELOW. i. BEFORE BOLTING MATING GASKET CONTACT SURFACES SHALL BE ALIGNNED TO EACH OTHER WITHIN 0.005 IN/IN (0.13 mm/mm) OF CONTACT DIAMETER OR 1/32 IN (3 mm) WHICHEVER IS GREATER. ii. FLANGE BOLT HOLES SHALL BE ALIGNED WITHIN 1/8 IN (3 mm) MAX OFFSET. iii. TOLERANCES ON ABOVE ALINGMENT CRITERIA ARE +/- 0.005 IN (0.13 mm). EXAMPLES: 8 IN, CLASS 300, RAISED FACE FLANGE CONTACT DIAMETER=10.62 IN. PARALLELISM = 0.005 IN/IN X 10.62 IN = 0.053 IN. NOTE 0.053 IN IS GREATER THAN 0.031 IN THUS 0.053 IN APPLIES. 2 IN, CLASS 300, RAISED FACE FLANGE CONTACT DIAMETER=3.62 IN. PARALLELISM = 0.005 IN/IN X 3.62 IN = 0.018 IN. NOTE 0.018 IN IS LESS THAN 0.031 IN THUS 0.031 IN APPLIES. 3. FLANGE ALIGNMENT SHOULD ONLY REQUIRE HAND TOOLS OR LIGHT FORCE TO ACHIEVE. JACKS OR COME-ALONGS USED FOR ALIGNMENT ARE NOT PERMITTED. 4. INSTALL ALL BOLTS, MAKING SURE THEY ARE FREE OF DIRT AND GRIT, AND ARE WELL LUBRICATED WITH THREAD LUBRICANT PER ITEM 6 REF DWG LIST. 5. RUN-UP ALL NUTS SNUG TIGHT WITHOUT COMPRESSING GASKET SEATING SURFACE. GENERAL ELECTRIC COMPANY

g

DRAWN ISSUED

GE Power Generation

GREENVILLE, SC


SIZE

A SCALE

CAGE CODE

DWG NO

351A3700 SHEET

19

SIZE

A

DWG NO

SH

351A3700

20

REV

AA

6. DEVELOP THE REQUIRED BOLT STRESS IN A MINIMUM OF FOUR STEPS, FOLLOWING A TIGHTENING UP PROCEDURE AS DETAILED IN FIG 4. 7. IT IS IMPORTANT TO MAKE CERTAIN THAT NO MORE THAN 30% OF THE REQUIRED BOLT STRESS IS ACHIEVED ON THE INITIAL SET. SHOULD THIS OCCUR, SERIOUS DAMAGE CAN BE DONE TO THE SPIRAL WOUND GASKET AND SUBSEQUENT TIGHTENING CANNOT OFFSET THE DAMAGE. AFTER FOLLOWING THIS SEQUENCE, A FINAL TIGHTENING SHOULD BE PERFORMED IN A CLOCKWISE BOLT-TO-BOLT SEQUENCE TO ENSURE THAT ALL BOLTS HAVE BEEN EVENLY STRESSED.

FIGURE 4 – BOLTING-UP SEQUENCE

BY FOLLOWING THE ABOVE SEQUENCE, A REASONABLY EVEN COMPRESSIVE FORCE CAN BE EXERTED ON THE GASKET. HOWEVER, BECAUSE OF THE VARYING FRICTIONAL CONDITIONS OF NEIGHBORING BOLTS AND THE FLUCTUATIONS IN STRESS LEVELS OF BOLTS, WHICH OCCUR AS THE BOLTS ARE INDIVIDUALLY TIGHTENED AROUND A FLANGE, THE FINAL LEVEL OF STRESS IN ALL BOLTS AROUND THE FLANGE CAN VARY CONSIDERABLY. EVEN UNDER IDEAL CONDITIONS WHERE ALL BOLTS HAVE BEEN LUBRICATED TO THE SAME DEGREE AND THE RECOMMENDED BOLTING-UP SEQUENCE IS FOLLOWED USING CONTROLLED TORQUES, TESTS HAVE SHOWN THAT THE FINAL STRESS LEVELS IN BOLTS AROUND THE FLANGE CAN VARY AS MUCH AS PLUS OR MINUS 20% FROM THE AVERAGE. IF THE BOLTS ARE STRESSED BY AN UNCONTROLLED METHOD, E.G., HAMMER WRENCHES, ETC., THEN THE FINAL STRESS LEVELS IN BOLTS AROUND THE FLANGE WILL VARY ENORMOUSLY. THEREFORE, CONTROLLED METHODS MUST BE USED.


g

DRAWN ISSUED

GE Power Generation

GREENVILLE, SC


SIZE

A SCALE

CAGE CODE

DWG NO

351A3700 SHEET

20

SIZE

A

DWG NO

SH

351A3700

21

REV

AA

REFER TO THE APPLICABLE GRADE OF BOLT/STUD IN THE TABLE V BELOW FOR TORQUE REQUIREMENTS OF PIPING FLANGES. TABLE V

GENERAL TORQUE REQUIREMENTS FOR SPIRAL WOUND GASKET FLANGES SAE J429 Gr.8 Nominal ASTM A193 Gr.B7 ASTM A193 Gr.B8M ASTM A354 Gr. BD Bolt Diameter Head Marking Head Marking Head Marking & Threads L, CR, B7, HB7 A2A, A2B, B8M Six Radial Lines1 ft. lbs. [Nm] ft. lbs. [Nm] ft. lbs. [Nm] 8-32 0.8-1 [1.1-1.3] 0.8-1 [1.1-1.3] 0.2-0.9 [0.3-1.2] #10-32 2-3 [2.7-4.0] 2-3 [2.7-4.0] 1.5-2 [2.0-2.7] .25-20 5-6 [6.8-8.1] 5-6[6.8-8.1] 4-5 [5.4-6.8] .3125-18 9-11 [12.2-14.9] 9-11 [12.2-14.9] 8-10 [10.8-13.6] .375- 16 17-21 [23.0-28.5] 14-17 [19.0-23.0] 11-14 [14.9-19.0] .50-13 52-56 [71-76] 43-45 [58-61] 36-37 [49-50] .625-11 98-105 [133-142] 81-85 [110-115] 68-69 [92-94] .750-10 161-178 [218-241] 134-144 [182-195] 111-117 [151-159] .875-9 252-277 [342-376] 209-224 [283-304] 174-182 [236-247] 1.00-8 366-407 [496-552] 302-329 [410-446] 251-267 [340-362] 1.125-8 532-606 [721-822] 438-490 [594-664] 362-397 [491-538] 1.25-8 699-804[948-1090] 573-650 [777-881] 472-527 [640-715] 1.375-8 950-1102 [1288-1494] 778-891 [1055-1208] 640-722[868-979] 1.50-8 1201-1400[1629-1898] 982-1132 [1332-1535] 807-918 [1094-1245] 1. Use for SAE Code 61/62 Flanges


g

DRAWN ISSUED

GE Power Generation

GREENVILLE, SC


SIZE

A SCALE

CAGE CODE

DWG NO

351A3700 SHEET

21

SIZE

DWG NO

SH

351A3700

A

22

REV

AA

14.

MATCHMARKING REQUIREMENTS

14.1

MATCHMARKING REQUIREMENTS FOR FLEXIBLE METAL HOSE ASSEMBLIES.

14.1.1

ENGINEERING RECOMMENDS THE FOLLOWING ITEMS BE FOLLOWED IN THE MANUFACTURING FACILITY AND FIELD INSTALLATIONS. THE PROCEDURE IS WRITTEN TO ADDRESS HANDLING OF FLEXIBLE METAL HOSES AT THE D ISASSEMBLY PHASE ONLY. DISASSEMBLY ACTIVITY SHALL INCLUDE UNIT TEARDOWNS AND MODIFICATIONS IN GREENVILLE AND ALL FIELD MAINTENANCE TASKS. SCHEDULED AND UNSCHEDULED, AT ANY SITE. IT SHOULD BE NOTED THAT MATCHMARKING OF FLEXIBLE METAL HOSE AT THE INITIAL MANUFACTURING OR FIELD INSTALLATION PHASE IS NOT REQUIRED. AS DESCRIBED ABOVE, THE NEED FOR MATCHMARKING ONLY APPLIES AT THE DISASSEMBLY PHASE, SPECIFICALLY AFTER THE UNIT GAS TURBINE HAS OPERATED.

14.1.2

PRIOR TO REMOVAL OF ANY FLEXIBLE METAL HOSE, IT SHOULD BE MARKED IN SUCH A MANNER THAT THE INSTALLED LOCATION AND ORIENTATION IS CLEARLY IDENTIFIED. THE MATCHMARKING SHOULD ALSO BE APPLIED TO THE FLANGES OF THE MATING EQUIPMENT, SINCE MANY FLEXIBLE METAL HOSES ARE CONSTRUCTED WITH FREELY ROTATING LAP JOINT FLANGES. THE MARKING SHALL BE NONDESTRUCTIVE IN TYPE AND WILL ALSO BE APPLIED IN SUCH A MANNER THAT IT CAN NOT BE REMOVED DURING NORMAL CLEANING AND INSPECTION ACTIVITIES.

14.1.3

DURING REMOVAL AND SUBSEQUENT STORAGE AND MAINTENANCE ACTIVITIES, FLEXIBLE METAL HOSES SHALL BE HANDLED IN SUCH A MANNER THAT THE HOSE SECTION IS NOT PLACED IN A STRESSED CONDITION. NEVER ALLOW A FLEXIBLE METAL HOSE TO HANG UNSUPPORTED FROM A MANIFOLD OR OTHER PIPING CONNECTION, AS PROBABLE DAMAGE WILL OCCUR IN THE VICINITY OF THE BRAID SLEEVE.

14.1.4

WHILE INSTALLING FLEXIBLE METAL HOSE, THE OPERATOR SHALL RETURN THE HOSE TO ITS ORIGINAL LOCATION AND ORIENTATION USING THE MARKINGS APPLIED AT DISASSEMBLY AS A GUIDE.


g

DRAWN ISSUED

GE Power Generation

GREENVILLE, SC


SIZE

A SCALE

CAGE CODE

DWG NO

351A3700 SHEET

22

SIZE

DWG NO

SH

351A3700

A

15.

23

REV

AA

FLEXIBLE METAL HOSE AND EXPANSION JOINT ORDERING PRACTICE

FLEXIBLE METAL HOSE ASSEMBLIES AND METAL EXPANSION JOINT ARE HIGHLY SPECIALIZED AND ENGINEERED COMPONENTS. THE SPECIFIC DATA FOR ORDERING IS CONTAINED IN THE COMPONENT ORDERING DRAWINGS. THESE ORDERING DRAWINGS ARE SUPPLIMENTED BY THE PROCUREMENT SPECIFICATION LISTED IN COMPLIMENTARY DOCUMENTS ITEM 13 OR 14. FLEXIBLE METAL HOSE AND METAL EXPANSION JOINT SUPPLIERS IDENTIFIED IN LEGACY GE ORDERING DRAWINGS ARE SUPERCEEDED BY THE APPROVED AND QUALIFIED SUPPLIER LISTED IN THE ELECTRONIC SUPPLIER MANAGEMENT SYSTEM (eSMS). 16.

FLEXIBLE METAL HOSE INSTALLATION PRACTICE

16.1

FLEXIBLE METAL HOSE HAS EVOLVED TO REQUIRE HIGH FACTORS OF SAFETY. FOR FLEXIBLE METAL HOSE WE NEED TO RECOGNIZE THREE UNACCEPTABLE METHODS OF INSTALLATION. THESE UNACCEPTABLE CONDITIONS ARE HOSE INSTALLED UNDER COMPRESSION, TENSION OR TORSION. FIRST, COMPRESSING FLEXIBLE METAL HOSE DURING INSTALLATION IS PROHIBITED. COMPRESSING FLEXIBLE METAL HOSE RELAXES BRAID WHICH PROMOTES FAILURE. SECOND, WHEN FLEXIBLE METAL HOSE IS INSTALLED UNDER AXIAL TENSION THE BRAID TO WELD LIGAMENT CONNECTIONS ARE HIGH STRESSED. IF THESE CONNECTIONS ARE OVER STRESSED, FAILURE WILL RESULT. THIRD, FLEXIBLE METAL HOSE INSTALLED IN TORSION OR TWISTED. THE HOSE CORRUGATED PATH HAS A VERY LOW TORSION STRESS LIMIT. IF THIS LOW LIMIT IS EXCEEDED FAILURE WILL OCCUR.

16.2

THESE AREAS OF CONCERN GIVE THE PERCEPTION THAT A FLEXIBLE HOSE IS VERY DIFFICULT TO APPLY. HOWEVER, IF CONSERVATISM IS USED TO AVOID THE ABOVE CONDITIONS APPLYING FLEXIBLE METAL HOSE IS RELATIVELY EASY AND HIGHLY RELIABLE.

16.3

INDEPENDENT OF CONFIGURATION METHOD USED FLEXIBLE METAL HOSE SHALL BE INSTALLED IN A ONE PLANE BEND ONLY (REFER TO FIGURES 1 & 2).

FIGURE 1

FIGURE 2

OFF-SET METHOD

ANGULAR BEND METHOD


g

DRAWN ISSUED

GE Power Generation

GREENVILLE, SC


SIZE

A SCALE

CAGE CODE

DWG NO

351A3700 SHEET

23

SIZE

DWG NO

SH

351A3700

A

16.4

REV

24

AA

FLEXIBLE METAL HOSE ARE DESIGNED AND INSTALLED USING TWO (2) CONFIGURATION METHODS OFF-SET AND ANGULAR BEND. FOR HOSE INSTALLED USING THE OFF-SET METHOD REFER TO FIGURE 3. FOR HOSE INSTALLED USING THE ANGULAR BEND METHOD REFER TO FIGURE 4.

FIGURE 3

FIGURE 4

OFF-SET METHOD

ANGULAR BEND METHOD

16.5

IT IS RECOGNIZED THAT DURING THE FABRICATION AND INSTALLATION OF PIPING SYSTEMS TOLERANCE STACK-UPS AND WELDMENT, THERMAL BENDING OCCURS. AS A RESULT, INSTALLING FLEXIBLE METAL HOSE FULLY COMPRESSION OR TENSION FREE CAN BE VERY DIFFICULT. THEREFORE, INSPECTION METHODS FOR FLEXIBLE METAL HOSE WERE ESTABLISHED (REFER TO SHEET 24 FIGURES 5 AND 6).

16.6

IT SHOULD BE RECOGNIZED THAT THESE INSPECTION METHODS SHALL BE APPLIED AT THE OPERATING CONFIGURATION ONLY. BLANKS AND GASKETS ARE ADDED FOR PNEUMATIC/HYDRO-TESTING. THESE METHODS OF INSPECTION DO NOT APPLY AT THIS STAGE OF ASSEMBLY.


g

DRAWN ISSUED

GE Power Generation

GREENVILLE, SC


SIZE

A SCALE

CAGE CODE

DWG NO

351A3700 SHEET

24

SIZE

DWG NO

SH

351A3700

A

25

REV

AA

FIGURE 5

FIGURE 6

16.7

UTILIZING FIGURE 5 INSPECTION METHOD RESULTS IN A PERCENTAGE DIFFERENCE INSIDE TO OUTSIDE ARC LENGTH, THE INSIDE TO OUTSIDE ARC LENGTH PERCENTAGE DIFFERENCE IS DIRECTLY RELATED TO FLEXIBLE METAL HOSE MINIMUM ALLOWABLE BEND RADIUS. IT SHO ULD BE RECOGNIZED THAT ARC LENGTH IS WITH RESPECT TO TH E BEGINNING AND END OF A FLEXIBLE METAL HOSE BEND, NOT HOSE COLLAR TO COLLAR LENGTH. TO AIDE IN MEASURING INSIDE AND OUTSIDE ARC LENGTHS, STRAPS MUST BE FIXED ON BOTH ENDS OF BEND. GENERAL ELECTRIC COMPANY

g

DRAWN ISSUED

GE Power Generation

GREENVILLE, SC


SIZE

A SCALE

CAGE CODE

DWG NO

351A3700 SHEET

25

SIZE

DWG NO

SH

351A3700

A

16.7

REV

26

AA

(CONT’D) TO MAINTAIN MINIMUM ALLOWABLE BEND RADIUS, NOMINAL PIPE SIZE ALLOWABLE INSIDE AND OUTSIDE ARC LE NGTH PERCENTAGE DIFFERENCES HAVE BEEN ESTABLISHED AS FOLLOWS: HOSE LINE SIZE NPS 1.00” 1.50” 2.00” 2.50” 3.00” 4.00” 6.00”

ARC LENGTH DIFFERENCE MAX. ALLOWABLE (INSIDE TO OUTSIDE) (% DIFFERENCE) 14 15 18 15 16 16 18

16.8

WHEN INSTALLING FLEXIBLE METAL HOSE THE ABOVE NOMINAL PIPE SIZE ARC LENGTH DIFFERENCE MAXIMUM ALLOWABLE MUST NOT BE EXCEEDED.

16.9

A STRAIGHT FLEXIBLE METAL HOSE APPLICATION SHALL MAINTAIN A MINIMUM TO MAXIMUM FLANGE TO FLANGE OVERLAP/UNDERLAP LESS THAN 1/4" BEFORE ASSEMBLY (REFER TO SHEET 24 FIGURE 6 ).

16.10

IT SHOULD BE RECOGNIZED THAT IT IS PROHIBITED TO EXCEED THE ABOVE INSTALLATION TOLERANCES WITHOUT DESIGN ENGINEERING APPROVAL.

17.

CLEANLINESS

WHEN SPECIFIED , POWER PLANT COMPONENTS IDENTIFIED IN ITEM 10 362A2412, SHALL MEET THE REQUIREMENTS SPECIFIED THEREIN . FOR ALL PIPING, OPENINGS IN CLEANED, PIPING SHALL BE COVERED OR CLOSED IMMEDIATELY TO PREVENT RECONTAMINATION CLOSURE METHODS AND HARDWARE SHALL BE IN ACCORDANCE WITH ITEM 11 (P23E-AL-0255 MARKING, PRESERVATION, PACKAGING AND SHIPPING GENERAL REQUIREMENTS).


g

DRAWN ISSUED

GE Power Generation

GREENVILLE, SC


SIZE

A SCALE

CAGE CODE

DWG NO

351A3700 SHEET

26

DRG(Applied Practices Piping)

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