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Hello, I need to use some Crosby 75t shackles located on a piece of equipment for a recovery operation. However, I can not obtain any certification documentation on these shackles. What are my options? Can I go the the manufacturer to obtain original certifications? Unfortunately, all I...

Hello, What are your company policies for safety training for Engineers traveling to offshore Oil Production Vessels? Do most companies require HUET, PST or BOSIET? and, is this a requirement for Engineers who are only observers? I am working in China and it appears that they will allow you...

Hi, I just found the report. The Steel grade is 1620N/mm^2 and all is good. Thanks

Hi, thanks for the reponse. I do have a reference number for the certificate but it may be awhile before I can get it. I have the Webtool RCV115 available to me. It can cut upto 115mm diameter wires so I am at about 78% of that for the diameter. Any experience with this tool? Thanks

Hi, I need to cut a mooring wire and my cutter says it will cut a wire rope of 1770N/mm^2 or Grade 180. However, I only know the wire rope is diameter 90mm, 39.6kg/m and has a nominal breaking strength of 6800kN. How do I determine the grade or breaking stress of my wire rope? Thanks

Hi, I am looking into a pressure vessel that uses a 7/45 Buttress thread. It operates at 10 000 psi and has a 14 inch diameter flat lid. They are having problems with the threads seizing. Does anyone have some experience to share with this thread style. I have read that the distribution of...

Hi, Thanks, is the carbon content rule a limitation for welded construction only? This lid would be mechanically fastened and not welded.

Hi, I am investigating materials for the flat lid of a 10000psi pressure vessel. It would use fresh water to pressure test components for subsea use. And would be operated in a shop environment. What would be a good choice? A516, A387, A285? Is it possible to use higher strength steels...

Hi, I have a NNF Bearing from SKF that is part of a sheave. What would be a suitable grease for relubrication? And, what properties of the grease are important? The bearing supplier has reccomended Mystik JT-6. However, they could not provide any reasons why they use this grease. SKF...

Hi, thanks for the response. I have been reading the Code of Federal Regulation 49-Transportation. While I can find restrictions for the flow of liquified compressed gases I don't find any restrictions for air.

Hello, is there a reccomended or maximum limit for the flow rate when filling or venting TC / DOT cylinders with air? I am preparing maintenance procedures that will require filling and venting 43L cylinders. I have made inquiries with DOT and TC but have not got a reply. My compressor is...

Thank you Iainuts, Your comments has helped me in my research. While the equipment can be easily transported, the operation occurs when when it has been installed on a ship. We do not intend to transport the gas bottles charged. As such, DOT has no authority to enforce it's regulations. The...

Hi, I am considering using a standard DOT-E10869-4500 Gas cylinder as an auxiliary gas bottle for an hydraulic accumulator system. The ports for the gas cylinders seem to all be 3/4-14 NGT as a standard. I don't want to restrict the flow by placing a valve on the end of the cylinder. I want...

Thanks, I am looking for the "ship/car" MC channels that have relatively thick flanges. My CISC book has the section properties but does not include any detail on the angle of taper or size of inside radius. I am going to focus on asking some suppliers... but I still have yet to find one.

Hi, I am considering using some MC channel in a structure. It appears that the flanges are not tapered. Where can I find detailed information on MC channel? Does it meet any ASTM spec? Thanks

Hi, can you please identify this bolt from the attached photo. Interpolating the width across the flats results in a measurement of 1.80 inches. Thanks a bunch, Jeff

Yes, this structure is part of the handling system. Section 11.1 of Appendix 4 only states that the materials are to be suitable for intended conditions.

Hello, I have a various structures that are being certified to ABS for underwater vehicles. Most of the structure is specified as A572 GR 50 or A516 GR 70 plate or W flange. However, I need some square tube. Will I have to go to stainless steel to get CVN's of 25 ft-lbs at -20F. Or, is...