1.0 SCOPE: This docum ent calculated the design of Spreader Bar,Padeye and the Slings 2.0 REFERENCES 2.1 REFERENCE DOCUMENTS DNV 2.7-1: DNV STANDARD FOR CERTIFICATION No.2.71. API 17D Annex-K:PADEYE designed based on API 17D Annex-K 3.0 ASSUMPTIONS 1.DAF is Considered as 3 for designing the Spreader bar design 2.Design Factor is Considered as 5 for Sling design
Spreader Beam is designed based on the self weight of Jumper spool Load and the Connector Weight.Factor of safety is considered as 3.
Weights of the Jumper spool and Connector: Overall weight of the Jum per includes Connector :4315kg 1st Connector Weight
C1 := 1761.3kg
2nd Connector Weight
C2 := 1761.3kg
Jum per pipe Weight includes fluid weight Design Factor
J1 := 933.33kg
DAF := 3
1st Connector weight with FOS
A1 := C1 ⋅ DAF = 5283.9 kg
2nd Connector Weight with FOS
B1 := C2 ⋅ DAF = 5283.9 kg
Jum per with Fluid weight includes FOS act at the COG:
Calculating the load acting at the top and bottom side of the Spreader Beam due to the jumper load and Connector Weight
Moment about A, RB := 6713.45kg RA := 6654.55kg The reaction force R A and R B are the force which are lifting the Jumper Spool load and this would be acting downwards of the spreader beam . Self weight of the spreader Beam SW=6630kg. Dynam ic Am plification Factor=3 Self weight has been shared on the spreader beam with below specified loacations with DAF as 3.
Considering the Self Weight of the Spreader Beam to find out the Reaction force at X and Y: Rx and Ry
Moment about Rx; 15.378 R Y =6713.45 (16.339)+6630 (13.39)+6630(8.65)+6630(3.91)-6654.55(0.961) Ry := 17905.09kg Rx := 15352.91kg The reaction force Rx and Ry are the weight which should be lifted by the top side padeye. Shear Force at Ra=-6654.55kg at Rx=8698.36kg
Maximum Bending Moment occur at Sw2=29053.47kgm Designing the Spreader beam dia and thickness based on the m aximum bending m oment Outer Diam eter of Pipe
Designing Padeye at the top of the Spreader Beam Reaction force acting at two ends of the top side of the Spreader Beam Rx := 15352.91kg = 15352.91 kg Ry := 17905.91kg = 17905.91 kg MGW := Rx + Ry = 33258.82 kg MGW1 := 33.258tonne MGW1 := MGW1 ⋅ g = 326.15 ⋅ kN Padeye -In Plane Loads (Per DNV 2.7-3 Section 3.5.4) Sling angle from vertical
α := 30°
No significant uncertainity in CoG
PL := 0.5 RSF :=
1.2 ⋅ PL⋅ MGW1 cos( α)
= 225.963 ⋅ kN
Resultant Sling force (RSF) on each Padeye for single point lift.
Nominal Dia 40mm ,6*36 CLASS IWRC,1960 Grade, MAXIMUM BREAKING LOAD 115 TONNE.
Designing a Padeye at the bottom of the Spreader Beam Reaction force acting at two ends of the connector Ra := 6654.55kg = 6654.55 kg Rb := 6713.45kg = 6713.45 kg
No significant uncertainity in CoG PL := 0.5 1.2 ⋅ PL⋅ MGW1 Resultant Sling force (RSF) RSF := = 78.657 ⋅ kN cos( α) on each Padeye for single point lift. RSF = 8.021⋅ tonnef
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