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Hi all, Does anyone have any experience/advice to share on the suitability of Nickel Aluminium Bronze as a material for valves handling raw Arabian Gulf seawater? Thanks as always, Tom

Hi All, I'm looking for some refereces/advice on the performance of Ductile Iron ASTM A536-GR60 in Arabian Gulf Seawater (high temperature, high salinity), as a material for valves and penstock gates. Thanks for your help. Tom

Thanks for the comments. Yes I'm going to try again with him. I also found references in the BS/EN/ISO standard and also an FM standard which recommends against the discharge test. Cheers, Tom

Hello, We have a couple of Novec systems installed in some server rooms on our project. We have installed the systems and completed the room inegrity tests and other checks in accordance with NFPA2001. However, our Divisional Fire Officer (AHJ) is insisting on a full discharge test to be...

Hello, We're experiencing water hammer in a fire water network. The pump closed valve pressure is 15 bar, but when the pump is shut down, we experience an instantaneous pressure spike up to 21 bar (measured with a paper disk type pressure recorder). The spike happens when the swing check valve...

Hello, Can anyone offer any advice on methods of controlling marine growth for a sea water cooling system in the arabian gulf? I have reference of other projects in the region using hypochlorite injection systems. Can anyone provide the names of companies (with presence in the gulf region) who...

Steve Jones - thanks.

JLSeagull - thanks, that's very helpful.

Arabian Gulf seawater, and it's a near shore installation (on reclaimed land). Tom

Hello, We are having some corrosion issues with Duplex stainless steel grade 2205 piping used in the Gulf region for a sea water cooling process. We are yet to find the root cause of the corrosion and are presently investigating if it is a welding problem, or a problem with the material...

Hello, We have various field instrumentation, such as pressure, temperature and level switches/transmitters on our plant which have been installed but are yet to be tested and commissioned. Can anyone give me a few bullet points for general items that should be checked during the testing and...

Hello, We have various field instrumentation, such as pressure, temperature and level switches and transmitters on our project which have been installed but are yet to be tested and commissioned. Can anyone give me a few bullet points for general items that should be checked during the testing...

Thanks James & Latexman, If the chemicals spilled at the moment, they would drain into the storm drainage system. Can you refer to any specific environmental codes which give any guidance on the design of the spill containment area? How would I go about sizing a collection basin, would this...

Hello, We have Outdoor storage of Hydrochloric Acid (10m3) and Sodium Hydroxide (10m3) on our project site for a water treatment process. The delivery vehicle for both chemicals has volume of 25m3.We have provided spill containment for the storage tanks themselves, but what I'm trying to...

Hello, We have Outdoor storage of Hydrochloric Acid (10m3) and Sodium Hydroxide (10m3) on our project site for a water treatment process. The delivery vehicle for both chemicals has volume of 25m3. We have provided spill containment for the storage tanks themselves, but what I'm trying to...

My colleague demonstrated that the bolt tenstion does not change with the inital load with the following experiment: Put an elastic band around a ruler lengthways. The elastic band is the nut and bolt, the beam/bracket is the ruler. When adding an initial load to the elastic band at the end of...

Thanks for your input everyone. Well it seems that we have a consensus that in the real world where beam and bracked are not infinitely stiff, the loads are not simply additive, the bolt tension does change, and we must consider the stiffness of the materials. Thanks for the formula...

This is a hypothetical question which my colleagues and I have been discussing all afternoon - please help! A bracket is fixed to the underside of a steel beam with a nut and bolt. The bolt is torqued up to provide a tension in the bolt of 10 Tonnes. An additional weight of 5 tonnes is then...

Hi, I'm looking at a number of pumping systems and am wondering what people's opinions are on the requirements for dismantling joints and flexible couplings/rubber bellows. Generally if there are rubber bellows on both the pump suction and discharge, is it also necessary to have dismantling...

Hi, thanks for your replies. Ductile Iron has been used in one of our pump house specifications and I wasn't sure if this was allowed. There seems to be mixed opinions amongst my colleagues..