Recent content by alby87

Thanks.. My problem is that on paragraph 8 of ISO part 1 it is write that the qualification is extended to valves of the "same type" but it is not define the "same type". Talking with TUV they say that gate is equal to globe if they have the same movement of stem (i.e linear rising, not...

Dear All, if i'll test a gate valve as per ISO 15848 part 1, is it possible to qualify even globe valves and other valves with the same packing and body/bonnet gasket design? Alberto

Dear All, i would ask you if it is possible to use ASTM A487-4C alloy steel at -46°C for 5000 psi .If not there is other material 60K for -46°c service? Alberto

ahahahah thank you scotty

In order to certify the equipment (valve+actuator) with SIL level 2, i can show to TUV the two certificates (one for valve & one for actuator) or i need a new certificate of the assembly?

My problem is that i don't find a material (60k) suitable for -125/+120 °C for API 6A valves class 10000

CA6NM can be considered a Corrosion resistant material? In internet i found that is a CRA material but i'm not sure

Dear all, for a gate valve 6"150 exist a solution in which i can use (at the same time) a lantern ring for stem injection and a ARMASEAL 312 graphite packing for ISO FE 15848 class B? Considering that i cannot split the stem packing

A possible solution is A193 gr B16 and A194 gr 4. Those materials are good with high temperature (around 550°C) and high pressure.

Has anyone know some good handbook, bibliography or essay about new technology of packing seal on valve's stem for low fugitive emission? i would know more about valve's stem sealing

I follow Shell TAT from 2010 on gate, globe, check through conduit gate valves; i asked Shell if it is possible to view the TAMAP list and they say that is not possible. In order to test the valves you need to do an audit with Shell and then, when you are qualified, you can proceed with type...

Good morning, Exist some standards (like ASME, API) with reference to calculation for valve with elliptical body/bonnet connection.. my problem is that in the elliptic flange it's difficult to consider a bolt circle diameter (instead in the circular b/b connection there are a unic bolt circle...

I need to know if exist a procedure to complete the EVADOC 1-7 of Shell specification 77/300 in the right way. The MESC Spec 77/300D describe the seven EVADOC but don't explain the way to complete and put the correct information in it. My problem is that every single Shell GSI engineer that...