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We have tested 3/4" 800 globe valve upto 225 kg/cm2. (The purpose was to make testing assembly that can test upto 140 kg/cm2. As we have no availibility of 1500 rating valves). There was no leakage through glands and bonnet flange. The valve was tested in open and close conditions. The question...

Thanx METENGR for immediate reply... We are repairing by our own means,However from all the above discussion BLIND FLANGE material seems to be acceptable for plugs. Does API 510 allows forged flange material for plug material??????

OH ONE THING MORE METENGR... Tube sheet material is A-765-2 but it is overlayed with S31803 material.

METENGR.. The material of Tube sheet is A-765-2, E-2002 and E-3002 basically the tags of Heat Exchangers. EDSTAINLESS... Basically we are at the verge of Turnaround.. 2205 material bars are on order but i think ETA could not be possible before Turnaround. Yes STANWELD... We will seal welding...

We have a spare BLIND FLANGE of SA-182 F51 UNS NO. S-31803 (DUPLEX). Material of tubes of E-2002/E-3002 and E-3801 is A-789 UNS No. S-31803 that seem compatible with BLIND FLANGE material. Can we use Blind Flange material to prepare plugs for our exchangers?

ThanKs Mr. Scotsinst.. Can you give the details what sort of differences there? Regards

Can we use 900 RTJ gasket on 1500 rating flange of same sizes. Is there any difference between construction of 900 and 1500 rating RTJ gasket. Regards

Can we use ER309MoL filler wire for welding SS316 and Duplex steel?

THANKS metengr..thats what i was expecting... RMW.. The welding of the plug is on tube seal welds. We do not touch tubesheet for welding purpose.. THANKS again

CAN WE USE SS316L PLUGS TO WELD ON A-789 S31803? FOR WELDING WHAT FILLER WIRE TO BE USED? CAN WE USE ER-2209? INFORMATION WOULD BE APPRECIATED. REGARDS

Thanx all of u for giving me much information on the subject.

We have duplex material installed at our oil and gas plant. some days ago when our PLATE TYPE HEAT EXCHANGER (exchanging heat between rich and lean amine) efficiency went down, we open it. deposition of carbon observed with some hard scales. Sample was analysed in lab and the result was high...

Thanx for answering metengr. This is LEAN AMINE TRIM COOLER.Cooling water in tubes while amine solution is toward shell side. The material for tube sheet is A-266 cl2.

HI.. can we use SA 266 cl2 material for plugs, to be welded on A-179 tubes. Also please specify comparitive material if any. regards

Some body there tell me about welding of zirconium to titanium. Any related website for information.

DPT of studs and play of the nuts should be checked... Ring joint sealing surface should be checked...I m working in a petrochemical ... we do not replace ring joint unless we find scratches on sealing areas of ring joint... however for a toxic service (Ammonia) better to replace....

I need to know about strength wise comparison of EFW and ERW pipes... which pipe to be used where?... Some where i studied that welded pipes have 25% lesser yeild strength than seamless pipes.. but i do nee comparison of ERW VS EFW.. thnx

AutoPIPE is user friendly and having a vareity of options...

Offcourse CRG is right....these are suction strainer added an outer side very fine mesh....after commisioning of machine this outer mesh is removed because it chock due to fine particles that may be in the pipelines resulting in high delta P..... I have seen the suction strainer for...

I have to give a presentation on "Thermochromic paint and its application". We have a FURNACE and SECONDARY REFORMER+TRANSFER LINE where this paint is used.At the time of failure of inner refractory material the high temperature causes hot spot which results in change of colour of...