We experience the crack in bleech lock heat exchanger which shell side contains large amount of Hydrogen gas.  We need to plug the tube with conical plug (welding is not allowed due to the risk of contraction of other tube holes). Therefore, we'd like to ask if anyone have experience in selection of plug type/design e.g. degree of taper, length to get the highest tightness.  Thank you very much.

Hey,rnI have question regarding mothballing,rnwhat are the method for mothballing the following equipment:rn rn- heat exchanger (internal and external)rn- Piping, valves and fitting (internal and external)rn- Tanks and pressure vessels (internal and external)rnregards and thanksrnMohammed AL ShehhirnInspection Engineerrn rn 

In this article you will find the failure investigations of six 0.094 inch thick carbon steel vessels. These vessels were in service in natural gas well facilities; some functioned as dryers and were subjected to cyclic loads. Metallographic tests, hardness tests, and fracture surface scanning electron microscopy (SEM) examination results are presented for each of the vessels.

Hi guys just a general question about relief valves which are spared:If you have two relief valve (one a spare) which are both are on a 5 year overhaul/test schedule (due to regulations), do you take the online off after say 3 years and send it to get overhauled, and let the spared valve run online for the next 2 years?How can you trust that this spared relief valve will be safe to operate, if it has been sitting idle for 3 years? Should you not install it, and only install it when needed?Before you put the spared on online, should you pop test it?Cheers,

Is anyone aware of a Standard/code requirement on the testing of PSV's prior to installation? We get new PSV's that are certified but may sit in the warehouse for a year or two prior to installation. When they are inspected in situ on the pressure vessels, there is only the test date as a reference, not installation date. The PSV's may have been tested 3 years prior and installed for one year. As a result, they may be getting changed out more frequently than required. I am interested to know if your company has developed it's own policy on this or if anyone is aware of a statutory requirement?

I would like to ask to the forum if there is any standard, best practice, code or rule of thumb where specify the min. distance between welds (piping/vessels.

Dear FriendsI newly joined this forum and noticed most of topics refer to plant inspection and corrosion so I decided to post some content about inspection during manufacturing process or third party inspection process for fix equipment.when a buyer or purchaser opens LC in her bank to do payment to the equipment manufacture, normally designates a third party inspection company for inspection.so third party inspection company must inspect the equipment and issues the inspection certificate and deliver to manufacture. then manufacture can refer to her bank with other...

What would be the maximum amount of piping circuits in a refinery that one inspector can manager efficiently per API guidelines and where can I find this information?

Hi.. I've double wall LPG storage tank (suspended deck at inner tank) sized 44m diameter which had never being internally inspected for 28 years. The inspection group had done the RBI and presented the case, which require the tank to immediately shutdown for internal inspection (of course involved hugh cost

- If a pressure vessel is designed to a standard other than ASME such as European ISO or say Japanese , can I still ask the manufacturer to get the ASME stamp on it .

Whether Inspection Data Management Systems (IDMS) or Risk Based Inspection (RBI) software packages, converting from one software platform to another can prove to be a daunting task. Ensuring that each piece of data is carefully translated between packages and streamlining implementation tools are critical components in successful AIM software implementation and conversion.

Air-cooled heat exchangers (AC-HEs) are used extensively throughout the oil and gas industry, from upstream production to refineries and petrochemical plants, under high pressure and high temperature conditions, as well as corrosive fluids and environments. Some defects and discontinuities can be introduced during the heat exchanger manufacturing process and are not necessarily found as part of QA/QC inspections. Other damage mechanisms (e.g. erosion-corrosion, sulfide stress corrosion cracking, thermal fatigue, and pitting corrosion due to CO2 or because of chloride content in the process stream) can occur while heat exchangers are in service.

Dear,Are there anyone have experience in about Rael-Time raiography technique to detect CUI on pressure vessel? I need to review this technique to detect large destilation column and 2000 mm OD pressure vessel.Regard,Bangkit WidayatJunior Inspection EngineerPT KMI

I am interested in learning what experience others have had or are familiar with regarding the use of boronizing (Chemical Vapor Deposition) of the internal surface of crude or (other process) heater return bends to control erosion.

Is there any certain criteria can be followed on reusing of bolts for pressure vessels and piping, or just blindly replace them once opened[Edited by Mohd Aboul Gheit on 05-Feb-12 04:42]

I have a U-tube bundle of a heat exchanger. A tube side hydrostatic test is to be performed.I noticed dry oil on the external side of the tube and i asked the vendor about it. He said that the oil was sprayed on the tubes long time ago by the manufacturer of the tubes before shipping shipping.What shall i do now? shall i do the test with the dry oil on the tubes? will it affect my ability to identify leaks of the tube? if so what are you recommendations?

LOTIS utilizes laser profilometry to conduct internal steam reformer tube inspections. The data captured by LOTIS is exceptionally powerful when combined with our LifeQuest™ remaining life assessment capabilities, providing an integrated solution set for the process and syngas industries.