actuator blast calc
DESCRIPTION
blast actuatorTRANSCRIPT
Contractor Logo:
Supplier
01 01/10/10 AS BUILT – CM500000010334 RM MU MT Rev/Status Code
Issue Date (DD/MM/YYYY)
Revision Description
Prep. Sign.
Chkd. Sign.
App. Sign.
Project Number: Project Title:
ACTUATORS Supplier Logo: Acceptance Code (Norsok):
(code 1) Accepted with comments incl.
(code 2)
Supplier Document Number: Not accepted, revise and resubmit
(code 3) ES10.004 Purchase order Number: SDL Code: Issued for information (code 4)
4511895768 6.3 Orig. Code: Resp. Code (Norsok):
Interface information as clouded is accepted and frozen (code 5)
Date : ____________________________
Signature : ___________________________
Document Title:
CALCULATIONS AND ANALYSIS
Tag Number(s) 91 ESDV-6708 / 91 ESDV-6709 / 91 ESDV-6710 / 91 ESDV-5760
Registration Codes Document Number Facility 1) Area: 1) System: 1) Doc.Sub.
Type:Achilles code: Platform: Orig.
code:Disc: Sequence No.:
EKOB A00 7 5 0 A02 2 1 9 0 2 E K O B V A G 0 0 1 8 6
PETROLVALVES - S.r.L. DIREZIONE TECNICA/ENGINEERING DEPT. DOC. N°. ES10-004 Rev.3
CASTELLANZA - ITALY SHEET 1 OF 9
ENGINEERING DATA SHEET Document No. ES10-004 rev.1 Subject : BLAST LOAD CALCULATION 16” AND 8” CLASS 2500 BALL
VALVE. Customer : CONOCOPHILLIPS SKANDINAVIA AS Project : EKOFISK 2/4B PLATFORM-NORWAY PV job : 209993
REVISION 0 1 2 3 PREPARED G.C. G.C. G.C. G.C. REVISED G.C. G.C. G.C. G.C. APPROVED R.P. R.P. R.P. G.C. DATE 12/01/10 23/03/10 30/06/10 All information contained in this document is property of PETROLVALVES and cannot be disclosed to anybody without prior written authorisation. Copy of this document requires former written authorisation.
Form PRO-DEN-05A1 rev. 0.
PETROLVALVES S.r.L. ES10.004 rev.3 Sheet 2 of 9
CONTENTS 1. INTRODUCTION ................................................................................................................................................... 3
2. CALCULATION ..................................................................................................................................................... 4
3. CALCULATION ..................................................................................................................................................... 5
4. CONCLUSION ........................................................................................................................................................ 5
5. ANNEX (DRAWING) ............................................................................................................................................. 6
PETROLVALVES S.r.L. ES10.004 rev.3 Sheet 3 of 9 1. INTRODUCTION Blas load calculation is performed in the worst conservative condition i.e. valve stem horizontal. Calculation is performed in the worst weak point which are the actuator/valve bolts on the valve side of the mounting spool.
Pressure
Drag load
PETROLVALVES S.r.L. ES10.004 rev.3 Sheet 4 of 9
2. CALCULATION
Actuator model RSOM 4500-125-NS, calculation for the horizontal stem installation:
but applicable also to:
Blast load
We 1200kg:= Actuator weight
Bolt verification −−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
Conservatively all weight and blast load is acting on the two external bolts only.Bolts preload is not considered in the calculation because will reduce the stress level.Torque effect due to the centre gravity offset is taken by flange friction and is negligiblecompare to actuator torque.
FtWe g⋅ L⋅
2 db⋅:= Ft 6.231 103× N= Weight load effect on bolt
FaFa L1⋅
2 db⋅:= Fa 1.879 104× N= Pressure load effect on bolt
σbFa Ft+
Ab:= σb 44.604 MPa= Bolts stress value
σb 44.604 MPa= < Sy 723 MPa=
VALVE SPLIT BODY 16"
L 377 mm⋅:= Actuator center gravity distance to the top flange
L1 415mm:= Actuator drag load acting distance to the top valve flange
db 356 mm⋅:= Bolts flange diameter
nb 8:= Bolts number M30
Ab 561 mm2⋅:= Bolt resistent area
Sy 723MPa:= Bolt material yield
Ar 1612000mm2:= Actuator blast area
P 0.02MPa:= Blast pressure
Fa P Ar⋅:=
PETROLVALVES S.r.L. ES10.004 rev.3 Sheet 5 of 9 3. CALCULATION
Actuator model RJOM 1400-90-BG and 1400-80-BG calculation for horizontal stem
installation, the different length doesn’t affect the bolts verification (see par. * ):
but applicable also to:
Blast load
We 490kg:= Actuator weight
Bolt verification −−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
Conservatively all weight and blast load is acting on the two external bolts only.Bolts preload is not considered in the calculation because will reduce the stress level.(*) Torque effect due to centre gravity offset is taken by flange friction and is negligible compare to actuator torque
FtWe g⋅ L⋅
2 db⋅:= Ft 2.54 103
× N= Weight load effect on bolt
FaFa L1⋅
2 db⋅:= Fa 7.27 103
× N= Pressure load effect on bolt
σbFa Ft+
Ab:= σb 40.04 MPa= Bolts stress value
σb 33.516 MPa= < Sy 723 MPa=
VALVE SPLIT BODY 8"
L 315 mm⋅:= Actuator center gravity distance to the top flange
L1 340mm:= Actuator drag load acting distance to the top flange
db 298 mm⋅:= Bolts flange diameter
nb 8:= Bolts number M20
Ab 245 mm2⋅:= Bolt resistent area
Sy 723MPa:= Bolt material yield A320 L7
Ar 637200 mm2:= Actuator blast area
P 0.02 MPa:= Blast pressure
Fa P Ar⋅:=
4. CONCLUSION Valve and actuator assembly are suitable to operate with the required blast load.
