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In one of our projects we are designing a Sour Water Stripping Unit with a Sour Water Stripper Column and a pump-around loop (on the top section of Stripper Column) which has a pump, an air cooler and associated piping. The top section of the Stripper Column is specified as clad with SS316L, the...

Thanks boo1 and TVP. So as per Table XII, A286 self-mated has low threshold galling stress, which is markedly improved by using Nitronic 60 with A286. These are the only combinations mentioned in this link and all other sources I have since found. If anyone has information or experience...

Hi all, For duplex stainlees steel flanged joints, we had specified ASTM A453 Gr. 660 bolts and ASTM A194 Gr. 2HM nuts (as per API 6A). However, we propose to change the nuts to a corrosion-resistant alloy (CRA) material. Can someone let me know any CRA material grades for nuts that are...

Hi Cloa, the steam cleaning is internal, and is expected to last for 3-4 hours. There are several such pressure vessels of various sizes.

Dear all, This post is regarding the type of external painting system that should be specified on carbon steel vessels to be cleaned with steam (at atmospheric pressure). The steam temperature is close to 180 deg. C. Does the steam out condition need to be considered while specifying the...

Hi all, We have some ball valves specified in high H2S service, for which a ball valve supplier has offered 17-4 PH martensitic stainless steel for stem. The supplier's contention is that the stem will not be in contact with the process fluid under normal service conditions, and only in case of...

I have two questions regarding NACE MR0175/ ISO 15156: 1. NACE MR0175-2001 edition had a clause 1.3.2.2 for Low perssure Oil and Gas Multiphase systems: "When the total pressure is less than 1.8 MPa abs (265 psia), the maximum gas:oil ratio (SCF:BBL) is 5000 or less, and the H2S content is less...

Thanks all for your responses. Yes, the chlorides concentration is very high (this data comes from the MEG Regeneration Package supplier), but will chloride be a significant threat to carbon steel in the absence of oxygen? There is a provision for oxygen scavenger injection in the Regen...

The pump in question receives lean MEG from the MEG Regeneration Package. Relevant details are as follows - Design temperature : (26 / -7 deg. C) Fluid composition -: MEG : 85 wt % Produced water : 15% Chlorides : 20000 ppm (approx.) H2S ...