I'd like to use A4-70/A4-80 bolts in CAT II, III & IV service, however our supplier says he can't supply the required Type 3.1B Certification, so we have to install the dearer A193 B8 bolts instead. The highest pressure application is 4 Bar.
Anyone know if Type 3.1B certification is available...
Greeting from Ireland!
I have a problem with hammer in a sanitary system. Altering the rate of opening /closure on valves has delivered some degree of success, however I'd like to know if anyone has had success with other methods? Some sort of pulsation dampener would suit but I don't think...
Can anyone tell me if dual certification is permissable under ASTM or ASME?
I have a contractor who is supplying material certificates that claim compliance with ASTM A106-99 and ASTM A 53-99.
The compositions are somewhat similar, however A 106 is a Silicon killed steel, while A 53 is just...
