Search results for query: *

Does anyone have experience with steam flow control valves in supercritical steam cycles? What types of problems are encountered with the turbine control valves (erosion, vibration, etc.)? Are there specific issues that arise from their use in supercritical systems compared to subcritical...

That is why we are wondering if there are other FB plants that have the scrubber installed. It seems unusual and unnecessary, however, we are working with a plant that has one and is having problems with corrosion and deposition downstream of the scrubber.

Is it common to have SOx removal (scrubber) for the flue gas of a coal fired fluidized bed boiler? How many plants have a FB boiler with scrubbers?

How much chloride (HCl) is normally found in the flue gas from a coal fired boiler? Do some types of coal have higher concentrations of chloride than others?

Does anyone have experience with corrosion of the separation plates in an electrostatic precipitator downstream of a spray dry scrubber (for SOx removal)? What is the role of chlorides in corrosion downstream of the scrubber? The scrubber makeup water is the salty reject water from a reverse...

Does anyone have experience with corrosion of the separation plates in an electrostatic precipitator downstream of a spray dry scrubber (for SOx removal)? What is the role of chlorides in corrosion downstream of the scrubber? The scrubber makeup water is the salty reject water from a reverse...

What is the recommended operating temperature range for electrostatic precipitators installed after a spray dry scrubber? How close to the dewpoint can the temperature be at the outlet of the scrubber without corrosion and deposition in the electrostatic precipitator? Thanks.

How do you evaluate the fitness for service of a piping component that has localized wall thinning, not a crack? The wall thinning is a result of corrosion and flow accelerated corrosion. Is there a method to determine the likelihood of a "break before leak" or "leak before break"?

What about for higher pressure steam at 350-400F?

What is the effect of steam on rigid polyurethane closed cell foam? At what steam temperature would the foam melt in the absence of oxygen? At what temperature would it burn if oxygen is present?

The pipe is a part of a district heating system. Unfortunately, the water table is very high and it often above the level of the pipes.

The pipe is carrying steam at 400F so it must be insulated.

Does anyone have experience with preinsulated piping installed underground in a wet environment (high water table)? What materials are recommended for the insulation, conduit and outer shell? Have you experienced ID corrosion of the steel conduit due to water ingress into the insulated annulus...

The piping is used for steam distribution (400F), so plastic pipe would not be applicable.

Does anyone have experience with preinsulated piping installed underground in a wet environment (high water table)? What materials are recommended for the insulation, conduit and outer shell? Have you experienced ID corrosion of the steel conduit due to water ingress into the insulated annulus...

There is no reason to use TDS. You should just measure the conductivity. Also, by allowing the sample to cool slowly, you can introduce carbon dioxide from the air, which would increase the conductivity. You should have a proper sampling system including a primary cooler within 20 feet of the...

We are looking for info on experience with the prefabricated, preinsulated Perma-Pipe steam piping, in particular with the Multi-therm 500. Also, what is the maximum temperature and pressure for steam service?

We would like to attach a copper wire to a piece of ductile iron. What is the best method? Is it possible to solder the wire? If so, what solder should be used? Thank you, Lee

We are investigating several corrosion monitoring techniques for on-line monitoring and have a few questions: 1. For the Electrical Resistance sensor, we have seen instruments that use two electrodes of different diameters that are both exposed to the flow, instead of both being the same...

NBIC allows repair welding without post weld heat treatment, however, the welding procedures are not described (Parts RC and RD). Where would one find the procedures and is one of them temper bead welding? Would temper bead welding be applicable to a boiler drum ID corrosion groove and stress...