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tank fittings and accessory orientation

tank fittings and accessory orientation

tank fittings and accessory orientation

Hi. I just need to know what standards or codes I can used as a reference for my storage tanks. I'm doing a layout for my 1500cu.mtr and 750 cu.mtr chemical storage tanks and I need to know what are the standard fittings & pipeline connections as per tank, as well as their locations/orientations (what degrees or distances between them). My tanks will be fixed roof and cone down bottom. Hope you can help me out here. Thank you

RE: tank fittings and accessory orientation

Typical fittings: Inlet/outlet shell nozzle(s), possibly drain and/or sump, possibly overflow nozzle, shell manway, roof manway, roof vent, possibly emergency vent, roof and shell nozzles as required for instrumentation, possibly a float-type level gauge, spiral stairway or ladder, roof handrailing or platforms as desired, grounding lugs, possibly painter's scaffold hitch, possibly anchor bolt chairs, possibly mixer nozzles or manways, possibly a gauge hatch or gauge well.

RE: tank fittings and accessory orientation

Atmospheric storage tanks API 650, higher pressure tanks API 620.

However many tanks are just made to no specific code.

Connections - Up to you. There are normally restrictions and practical issues in putting them too close together, but too close is probably equivalent to 1D of the largest nozzle. At 1500 and 750 m3 you shouldn't be short of space.

I've seen nozzles all in one quadrant, I've seen them spaced out all over the place. you need to put your tank down and then work out where your incoming / outgoing pipework is and place the nozzles accordingly.

Always add a few spares.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

RE: tank fittings and accessory orientation

Noted with this Sirs. Someone also informed me to make a reference of API Specification 12F, I take note the information of the spacings and angles of positioning of line connections there. I'm at stage of pump selection now.Anyway thank you for the infos and help.

RE: tank fittings and accessory orientation

I agree with the comments above, but would like to add ...

Carefully consider both the number and locations of your manways based on your process, painting and maintenance requirements for the particular fluids you are storing.

Repeatedly, I have dealt with clients that want to add shell manways based on expected cleaning and painting requirements.

Personally, I do not believe that it is safe to clean or coat tank internals of your recommended size without one or two roof vent hatches or manways.

A couple of spare inlet/outlet nozzles at the bottom of the shell are a low cost insurance policy

Many clients also desire a slightly more expensive flush cleanout at the bottom of the shell.


Sr. Process Engineer

RE: tank fittings and accessory orientation

Thank you Sir, I'll double check with my seniors with this details and for the finalization of plan. For now, I have one manhole per tank.

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