Manhole Cover Davits

PDVSA ENGINEERING DESIGN MANUAL VOLUME 21 ENGINEERING STANDARD

PDVSA N°

10603.2.102

TITLE

MANHOLE COVER DAVITS

1

DEC.98

REAFFIRMED

3

0

DEC.86

APPROVED

2

REV. APPD.

DATE

Alexis Arévalo

E PDVSA, 1983

DESCRIPTION DATE

DEC.98

Y.K.

PAG. REV. APPD.

Jesús E. Rojas

A.A.

J.E.R.

J.S.

E.S.

APPD.

APPD.

DATE

DEC.98

ESPECIALISTAS

ENGINEERING STANDARD

PDVSA

PDVSA 10603.2.102 REVISION

FECHA

1

DEC.98

MANHOLE COVER DAVITS

Página 1 .Menú Principal

Indice manual

Indice volumen

Indice norma

FLANGE CENTER LINE COVER CENTER LINE BOLT WITH EYE (HOLE)

(2) HEX. NUT 3/4" AND WASHER 3/4" (2) HEX. NUT 3/4" AND WASHER 3/4"

BOLT WITH EYE (HOLE) HEXAGONAL BOLT 3/4" THREAD LENGTH WITH HEX. NUT

DAVIT HEXAGONAL BOLT 3/4" THREAD LENGTH WITH HEX. NUT

SEE DETAIL "E"

SEE DETAILE "E"

LUGS SEE DETAIL "D" LUGS SEE DETAIL "D"

DAVIT ARM

115

TIP

PIPE SLEEVE

6

TIP

6

SEE DETAIL C" PIPE SLEEVE

23

SEE DETAIL B"

P

23

1020

P

L

9

SEE DETAIL "B"

HOLE f 1/2"

HORIZONTAL MANWAY

VERTICAL MANWAY

SEE DETAIL "A"

MANWAY FLANGE

PIPE SLEEVE

EXTERNAL DIAMETER EQUAL TO PIPE SLEEVE 6

DETAIL "A"

3/4"

6 mm BRONZE RING.

6 mm MIN.

PIPE SLEEVE

HOLE Ø 9/16"

WN CAP (SCH TO MATCH PIPE)

6 mm PL

X 75 mm. LG.

3/4" NC

STANDARD THREAD

200 mm. FOR VERTICAL MW

280 mm. FOR HORIZONTAL MW

DAVIT

10

PIPE SLEEVE

6 DETAIL "B"

DETAIL "C"

PLATE THICKNESS: 12 R 25

HOLE Ø 7/8"

HOLE Ø 9/16"

40 40

R 25 BOLT WITH EYE (HOLE) X

SEE NOTE 2

DETAIL "D"

6 DISC THICKNESS 6 mm.

10 DETAIL "E"

ENGINEERING STANDARD

PDVSA

PDVSA 10603.2.102 REVISION

FECHA

1

DEC.98

MANHOLE COVER DAVITS

Página 2 .Menú Principal

RATING

150#

300#

600#

Indice manual

SIZE

DAVIT ARM SCH. 80

18” 20” 24” 18” 20” 24” 18” 20” 24”

1 1/2” 2” 2” 2” 2 1/2” 3” 3” 3” 3”

Indice volumen

SLEEVE DIM.

SCH.

L mm.

2” 2 1/2” 2 1/2” 2 1/2” 3” 3 1/2” 3 1/2” 3 1/2” 3 1/2”

80 40 40 40 80 40 40 40 40

200 200 280 230 250 300 250 280 300

Indice norma

R mm.

X mm.

300 300 300 300 380 380 380 380 380

35 35 35 50 50 50 50 50 50

NOTES 1..Lubricate space between arm davit and sleeve with grease. clean excess. 2..X = 50 mm. for horizontal manway cover lug. For vertical manway see table. 3..Manufacturer has to check and assure davit arm movement. 4..Materials have to be carbon steel or similar material. 5..Dimension are in milimeteres.

ENGINEERING STANDARD

PDVSA

PDVSA 10603.2.102 REVISION

FECHA

1

DEC.98

MANHOLE COVER DAVITS

Página 3 Indice volumen

BLANK

100

25

230

Indice norma

230

Indice manual

TO SUIT NOZZLE IN COVER

.Menú Principal

A

12

A

OUTSIDE DIAMETER & DRILLING OF BLANK TO MATCH NOZZLE IN COVER

SECTIONA-A" TYPE I

NOTES 1..See page 1 and 2 for all other dimensions and details 2..Type I davit may. be used for flat flanged top vertical vessels 3..Type II davit may be used for all horizontal cover with nozzles 4..All plates to be 10mm thick and same basic material of shell 5..All fillet welds to be 6mm unless otherwise noted 6..All dimensions are in mm unless otherwise noted

TYPE II