Rather concerned that you are distributing 25% load on each when requirements for the design of a 4 leg sling, in accordance with EN 13414-1 : 2008, Steel wire rope slings - Safety - Part 1: Slings for general lifting service. This code is recognised as complying with the EEC Machinery...
ASTM A694 / A694M - 08 Standard Specification for Carbon and Alloy Steel Forgings for Pipe Flanges, Fittings, Valves, and Parts for High-Pressure Transmission Service
ASME Standards
ASME B16.47 Large Diameter Steel Flanges
Thankfully the well has now been plugged but how frightening it is how little we have learned in this industry. There's a price to pay for the 'cheaper 'n' deeper' ethos that has been adopted. Now the finger pointing can begin in earnest and I think the MMS is going to come into the firing line...
This was posted by another correspondent some while back
"If the water is deep enough the object will reach terminal velocity. Examples of impact energies are:
- Drill collar - 1050KJ
- BOP - 1290KJ
- Drill Casing - 164KJ
Hence they are substantial and need to be considered.
The main loads...
