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  1. ballvalve1337

    Failure during Hydro Testing of 36" Ball Valve

    Do i understand correctly that you have pressurized the valve in closed position from one side with 1900psi? MWP for Class 600 is around 1500psi. Test pressure is 1.5x MWP = around 2275psi BUT only in half open position to test the valve shell NOT in closed position to test through seat leakage...
  2. ballvalve1337

    Cheaper Inconel 625 alternative steel with specific properties

    Thank you both. I knew there propably is no real alernative to these requirements. I thought maybe i missed something... No austenitic SS because of the high CTE only, yes. Is not working within the low alloy/carbon steel parts surrounding the internal parts. I will check Custom 450. Thanks for...
  3. ballvalve1337

    Cheaper Inconel 625 alternative steel with specific properties

    Good day, I wonder if there is a good, cheaper alternative to my reference steel/material "Inconel 625": Requirements: - same or better yield strenght - comparabel or better corrosion resistance (no carbon steel) - temperature resistant to min. 500°C/930°F. Better 600°C/1110°F - comparable...
  4. ballvalve1337

    What RTJ flange gaskets to buy for pressure class 2500 valve

    This makes sense! We will use R-type for testing now. Stainless steel 316 with restricted hardness to avoid damaging the ring grooves of the Stainless steel Valve.
  5. ballvalve1337

    What RTJ flange gaskets to buy for pressure class 2500 valve

    https://flexitallic.com/us/wp-content/uploads/sites/8/2019/06/Design-Criteria-Brochure_5-15-2019-low-res.pdf page 38. Ok here it is 6250psi max acc. ASME and 5000psi acc. API for Style R and RX. But still not applicaple for pressure test @ 1,5xCWP
  6. ballvalve1337

    What RTJ flange gaskets to buy for pressure class 2500 valve

    @jmec87. Different Kind of RTJ supplier literature. It is a bit confusing since 1.5x CWP at Shell testing is around 9300 psi. I will look for an example link later...
  7. ballvalve1337

    What RTJ flange gaskets to buy for pressure class 2500 valve

    Hello, i wonder why a lot of CL2500 valves have ASME B16.5 RTJ flanges to seal with RTJ gaskets according ASME B16.20. Correct me if i am wrong but for what i have just read the R or RX type according ASME B16.20 are only applicaple up to 5.000 psi which is below the max. CL2500 Rating of...
  8. ballvalve1337

    Valve body joint gasket for CLASS 2500 (1,5x pressure nominal) 9000psi (630bar)

    @chrysa1975 2. At a two piece split Body i mean the gasket between both Bodys. And of Course the gasket between Body and bonnet 3. the 1,5 x Rating is for shop testing only 5. Ball Valve acc. ASME B16.34 + API 6D. Size 8in CL2500 Trunnion mounted, A350 Gr. LF2 material
  9. ballvalve1337

    Valve body joint gasket for CLASS 2500 (1,5x pressure nominal) 9000psi (630bar)

    Hi, i am looking for a spiral wound gasket or an alternative gasket to seal a valve body joint, pressure class 2500. Problem with spiral wound gaskets e.g. "Flexitallic" or others are all limited to around 6000psi (420bar) which is the CL2500 operating Rating at ambient temp. BUT you need to...
  10. ballvalve1337

    SA-182 F6A NACE MR0103 compliant?

    Hello, i wonder if SA-182 F6A CLASS 1 or 2 (410SS forged equivalent) is NACE MR0103 compliant? NACE MR0103 clause 13.4.1.2 says: Heat-treatment procedure (three-step process) for UNS S41000, S42000, J91150 (CA15), and J91151 (CA15M) martensitic stainless steel is as follows: a) austenitize...
  11. ballvalve1337

    High temperature self-adhesive tape (400°C, 752°F)

    Graphite tape is not adhesive. Kapton tape was not bad! But after couple hourse it was not adhesive anymore… The MTIXTL Tape Looks interesstin! Thank you guys
  12. ballvalve1337

    High temperature self-adhesive tape (400°C, 752°F)

    Hi, does anybody know a self-adhesive tape for temperatures up to 400°C (752°F)? I am not Talking About radiant heat. I am Talking About heat condution proof tape. I need one that works continuously at temperature. At least 4-5 Hours.
  13. ballvalve1337

    NACE MR0175 compliant stainless steel bolts/nuts

    After discussing again with the customer we now decided to design according NACE MR0103 not MR0175 which makes all much more easier. Thank you all for your decision aid!
  14. ballvalve1337

    B8MNA or B8NA bolting minimum temperature

    @MJCronin did you wake up on the wrong side of the Floor?
  15. ballvalve1337

    ASME B31.3-2018 nuts material for elevated temperatures

    I received an answer vom ASME that there is an inconsistency in the Standard and it has been recorded as a request for Revision.
  16. ballvalve1337

    ASME B31.3-2018 nuts material for elevated temperatures

    Hi, ASME B31.3 Table A-2 shows nuts in stainless steel like 8MA, 8, 8A, 8CA, 8FA. They all are listed in A194 standard which is a high temperature standard. But A-2M only Shows values for min. temp. but not max temp. Also in A-2M (metric) only 40°C (100°F) are permitted. Why? I dont...
  17. ballvalve1337

    B8MNA or B8NA bolting minimum temperature

    Yes customers require bolting acc. B18.34 but also want to have flange and bolting calculated acc. BPVC.
  18. ballvalve1337

    B8MNA or B8NA bolting minimum temperature

    Yes valve design should be according ASME B16.34-2013 and ASME BPVC Section VIII, Mandatory Appendix 2. I own copys of it.
  19. ballvalve1337

    B8MNA or B8NA bolting minimum temperature

    You are right. SA-193 is the standard. But i can not find any minimal allowed temperatures in it. Application is a valve body joint at around 100bar (CLASS 600) pressure. The application also requires -50°C up to +450°C
  20. ballvalve1337

    B8MNA or B8NA bolting minimum temperature

    Good day, i am not very familiar with ASTM standards. Where can i find the min. allowed temperature for bolts made of B8MNA or B8NA material?

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