It is obvious that the locations for centering pins (dowel) were poorly chosen during design phase. However, all is not lost. You have options on your plate; such as, weld fill the centering pin holes, drill new hole for centering pin by staggering (upward) between the two adjacent flange bolt...
Interesting discussion thread.
I started to learn bits and pieces on Australian pressure vessel code (AS 1210) only recently. So excuse my limitation of knowledge on the topic at hand. However, having seen some examples in our plant, I think I can shed some light here with sufficient...
Normally flange faces are left unpainted per all specifications I came across so far; however, they are protected against corrosion by the use of enviropeel type of products or plastic/wooden coverings to protect flange gramophone from physical damage. If they happen to become rusted due to lack...
Worth double checking it is not a typo for commonly used RFSO (Raised Face Slip On) flange. Does the flange specification mention what type of flange it is (Weld neck, slip on, etc)?
Cheers,
Amin
Aside from Vanessa triple offset and Keystone (now Tyco) K-LOK butterfly valves, the other names that readily surface in my mind are Velan, Unicom (high performance type from S Korea) and Flow Serve.
Regards,
Amin
Hi,
I would like to know the Rule of Thumbs (DO's and DON'Ts) of installing multiple valves (same types as well as different types) side by side (in horizontal/vertical orientation) on a pipeline.
Today I came across an installation where a PTFE-lined ball check valve had been installed...
Hi,
I have got a plethora of questions regarding these valves. Can the forum members enlighten me
(1) For what type of applications and fluid media these types of NRV for more suitable?
(2) Is it preferable to use a ball check than a piston check for the fact that piston check relies on spring...
For emergency pipeline repair (erosion, corrosion, pinhole blow-outs, etc), we normally get Furmanite (http://www.furmanite.com) guys to machine two-part clamps which are then bolted together in-situ, and some sort of sealing resin pumped in. Works excellent all the time.
If lead time is an issue, you can fabricate your pressure test chamber by welding boiler plates (AS 1548-7-460 or 490) which is profusely used for the fabrication of pressure vessels in Australia per AS 4041 code.
