Generally speaking, does ASTM A312 or A778 provide better protection against corrosion. I have no specific application, but just trying to determine the main differences between the two standards for 304L/316L SS piping as related to corrosion.
Hoping one of you electrical guys can offer a possible answer to this:
I have a 9 yr old 1500W baseboard heater in one of my rooms. As I was walking by this morning, a loud pop and flash came from the middle of the heater (not at the junction box). Upon inspecting it, there was black residue...
Having a debate with colleagues whether there is a difference between these two types of pneumatic actuated valves. Can't find a clear definition which would explain the difference, but don't all pneumatic valves have electric solenoids (AC or DC) to control the air flow to the valves cylinder...
I am working on a plant in NY that requires 93% sulfuric acid, so part of the plant is the design of the tanker truck unloading station to fill a 6000 gallon tank that will be located in an adjacent building. Can anyone point me in the right direction for codes and requirements for the...
We have a client with an aeration system that consists of a 32' tall aeration tank with approx. 28' of liquid. The PD blowers are in a nearby building at ground level. The piping goes up and over the wall of the aeration tank to the bottom of the tank where the aeration diffusers are. When...
We have two pieces of equipment that requires process water in a new building. One requires 60 gpm @ 70 psi and the other requires 50 gpm @ 65 psi and will operate concurrently. We want to advise the owner of the total flow/pressure required coming into the building. Is this simply the...
I have an 8" stainless steel pipe to be cast into a concrete wall and running parallel to another concrete wall. An ANSI 150# flange needs to be cast into the wall that the pipe is penetrating. How close to the adjacent wall can the flange be installed to allow installation and removal of the...
We have an existing pump and pump curve. We know the physicals on the suction side of the pump, but the discharge is buried with no records of the physical layout, sizes, etc. We do have a discharge gauge installed about a foot above the pump discharge reading 16 psi. Knowing this, together...
I'm working on a project where I need to provide forces from a piping system to a structural engineer to design the support system. Attached is an example of one of the supports being designed. The fluid being transported is water at 20 psi. The velocity of the water is 9 fps. This is in an open...
I'm working on a project where I need to provide forces from a piping system to a structural engineer to design the support system. Attached is an example of one of the supports being designed. The fluid being transported is water at 20 psi. The velocity of the water is 9 fps. I know this...
I have a question regarding development of a system head curve. I've attached a basic example to help explain my question. If I have a duplex wet well and given a pump curve, I'm trying to determine the single and combined pump flow. My issue is in what system head flow do I use to determine...
I'm designing a system for a treatment plant consisting of a number of open rectangular channels and partial full circular pipes. I am using software to determine the hydraulic grade line, but when it comes to changes in direction in the channels, I can't seem to find any information on how to...
I have a low pressure/slight vacuum gas application in Australia where I require 750 mm sch 40 stainless pipe with am ID of 743 mm. A portion of the piping will be buried, so for the buried portion, I plan to transition to PE100/PN10 DR17 HDPE. Because I need to maintain an ID of at least the...
We are doing a WWTP in Idaho with a waste gas burner. We are trying to find setback requirements for the waste gas burner which will be an enclosed flare. ie, setback from property lines, buildings, roadways, etc. If anyone has this information or knows where to obtain it, could you please...
I am working on a project with a relatively tight site. It is a waste water treatment plant in the US (Maryland) that will have a 200HP boiler burning digester gases. In Canada, we have a code requirement to locate the stack 15 m (50 ft) from the perimeter of any digester or potential source...
We have a specification that calls for 316 SS pipe to be pickled and passivated. Does the piping purchased in North Amaerica pickled and passivated or is this a special order request?
Thanks,
We have just commissioned a triplex pump station consisting of a 30 ft deep wetwell and a 10 ft deep drywell. The drywell houses a 12" rubber swing flex check valve and a 12" plug valve on each discharge pipe prior to coming together at a common 12" header. The header is routed...
