NOISE ISOLATION EQUIPMENT

NOISE ISOLATION EQUIPMENT
Noise isolation shall be achieved by the following equipment. The Tenderer is required to submit acoustic test reports and all information as required in the Appendix A – Schedule of Technical Data and Guarantee and Appendix B – Calculation Sheet for Silencer/Insulation Performance for the noise isolation equipment offered together with his Tender. Failure to do so shall deem his Tender incomplete and shall cause his Tender
to be rejected for consideration.
3.1 RADIATOR AIR DISCHARGE SILENCERS, AIR INTAKE SILENCERS AND VENTILATION AIR INLET SILENCERS
The silencers shall be of dissipative type and constructed of specially selected high quality materials. Outer casings of silencers shall be made of galvanised steel sheets of thickness not less than 1.2 mm. Beams shall be lock-formed and mastic filled. Tack-welded lap joints are not acceptable due to high air leakage. Internal splitters of rectangular silencer shall be constructed of galvanised steel sheets of minimum 0.7 mm thick and shall have aerodynamically designed bell-mouth entrances with tapered tail sections for minimum static pressure loss. Bull-nosed section of internal splitters must be solid-faced to prevent erosion of acoustical in-fill. Centre pod of conical silencer shall be constructed of minimum 0.7 mm thick
galvanised steel sheets and shall have aerodynamically designed FRP inlet and tall cones. Acoustical in-fill shall be of inorganic high density bonded long stranded rock wool sufficient to obtain the specified acoustic performance and be packed under not less than 5% compression to eliminate voids due to vibration and settling. In-fill material shall be insect, vermin and moisture poof. Silencers using lock-formed joints shall not fail structurally when subjected to a differential air pressure of 1993 Pascal inside to outside of casing. Acoustic louver made of aluminium sheet or rain hood of galvanised steel sheet with bird mesh shall also be provided for the silencers. Junction or penetration between silencer and the walls shall be sealed with airtight with non-setting resilient caulking compound. The silencers shall be tested in an acoustic laboratory and acoustic test report and its attenuation performance shall be submitted to the S.O.’s Representative.
3.2 EXHAUST SILENCERS
Exhaust silencers shall consist of a primary silencer with a secondary exhaust silencer installed in series. The silencers shall be tested in an acoustic laboratory and acoustic test report and its attenuation performance shall be submitted to the S.O.’s Representative. The primary exhaust silencer shall be a multiple chamber reactive type designed for low frequency attenuation. The secondary exhaust silencer shall be straight-through absorptive type for mid to high frequency attenuation and to be installed in series with primary exhaust silencer. Silencer shall be of all welded steel construction finished with high quality aluminium sheets. Acoustical in-fill shall be inorganic high density bonded long stranded rock wool capable of maximum service temperature of 650 degree Celsius. The noise level at the exit of the exhaust system shall not exceed the noise level stated in Section 2.0 – Design Criteria above measured at one meter from the exit of the exhaust system. All supports and hangers for the silencers and exhaust system shall be of hot dipped galvanised steel with spring isolators.
3.3 ACOUSTIC DOORS
Equipment and personnel doors shall be acoustical doors for effective isolation of generator room noise. Acoustic doors shall be constructed from minimum 1.2 mm thick electrogalvanised steel sheet with acoustical in-fill of inorganic high density bonded long strand stranded rock wool sufficient to obtain the specified acoustic performance and be packed under not less than 5% compression to eliminate voids due to vibration and settling. Acoustic door shall be of at least Sound Transmission Class (STC) 46. 20140-10 – Acoustic Measurement of Sound Insulation in Building and of Building Elements: Laboratory Measurement of Airborne Sound Insulation of Small Building Elements, achieving at least STC 46. Acoustic test reports shall be submitted to S.O.’s Representative. If specified, acoustic fire rated door shall be of at least 1½ hours fire rating and of the type approved by Jabatan Bomba dan Penyelamat (JBP) Malaysia. The Tenderer shall submit a copy of approval by JBP together with his Tender. The acoustic fire rated door shall be tested in an independent laboratory in accordance with BS EN 1634-1 – Fire Resistant Test for Doors And Shutter Assemblies, Fire Doors And Shutters, to achieve a fire rating of at least 1½ hours. Fire resistant test reports shall be made available to the S.O.’s Representative for inspection.
The acoustic door assemblies shall consist of steel frame, door-leaf perimeter seal, floor seals, cam-lift hinges, pull handle, push plate and lock-set. Door leaf cladding and all door hardware such as cam-lift hinges, pull handle, push plate and lockset shall be made of stainless steel. Door hardware and seals shall also be for minimum 1½ hours fire rating. Cam-lift hinges used in conjunction with floor seal shall provide continuous
gravity activated compression against floor when door is closed. Raised threshold will not be permitted. The acoustic door shall be anti rust treated and finished externally both sides with decorative colour paints to the colours of the respective walls. The cost, whether or not provided in the Bill of Quantities, shall deem to be included in the Contract.
3.4 WALL AND CEILING INSULATION
In general the walls of the generator room are of 100 mm thick clay bricks walls plastered 20 mm thick both sides. If so required, the internal walls of the generator room shall be acoustically treated with sound absorption material of inorganic high density felted mineral fibre board covered with decorative facings, to achieve noise level outside the generator room not exceeding the noise levels as stated in Section 2.0 – Design Criteria above In the case where the ceiling is not of reinforced concrete slabs, the noise insulation shall be provided, and the ceiling shall be acoustically treated with sound absorption material of inorganic high density felted mineral fibreboard, to achieve at least STC 46. The Electrical Contractor shall be responsible to verify and ensure that the ceiling and associated structures of the generator room/building able to carry the additional loading of such acoustic ceiling treatment installation for the safe intended usage of the generator room. The sound absorption material used shall be of fire-retardant class to the requirement of and approved by JBP Malaysia. The cost for such acoustic treatment for the walls and the ceiling, whether or not provided in the Bill of Quantities, is deemed to be included in the Contract.

 

106 Responses to “ NOISE ISOLATION EQUIPMENT ”

  1. Thank you so much for the job! They seems interesting and important instruments.

  2. I like this a website because is this very nice and unbelievable.thank you for the good sharing all the world peoples .

  3. RoyalCBD says:

    oro2du Lovely site! I am loving it!! Will be back later to read some more. I am taking your feeds also.

  4. periodista says:

    Would you offer guest writers to write content in your case?

  5. 부커취 says:

    pretty practical stuff, overall I believe this is worth a bookmark, thanks

  6. Saved as a favorite, I like your web site!

  7. Wow! This could be one particular of the most helpful blogs We ave ever arrive across on this subject. Actually Wonderful. I am also an expert in this topic therefore I can understand your effort.

  8. Major thanks for the blog article. Cool.

  9. Very good article.Really thank you! Great.

  10. I will right away grab your rss feed as I can not find your email subscription link or e-newsletter service. Do you ave any? Please allow me know in order that I could subscribe. Thanks.

  11. visit says:

    I think this is a real great article.Really looking forward to read more. Want more.

  12. That is a great tip particularly to those fresh to the blogosphere. Brief but very precise info Thanks for sharing this one. A must read article!

  13. It as not that I want to replicate your web page, but I really like the style. Could you tell me which design are you using? Or was it tailor made?

  14. link says:

    What as up to every body, it as my first pay a quick visit of this web site; this web site

  15. louis vuitton sortie ??????30????????????????5??????????????? | ????????

  16. more details says:

    Write more, thats all I have to say. Literally, it seems as

  17. Im grateful for the article post.Really looking forward to read more. Will read on

  18. plex iptv says:

    Just wanna input that you have got a really great site, I enjoy the design and style it truly stands out.

  19. Very good article! We are linking to this particularly great content on our site. Keep up the great writing.

  20. HGOT 061 says:

    Wow, marvelous blog layout! How long have you been blogging for? you made blogging look easy. The overall look of your web site is fantastic, let alone the content!

  21. pre it can take place. Google Ads Our sites contain advertising from Google; these use cookies to ensure you get adverts

  22. There is visibly a bunch to realize about this. I feel you made various nice points in features also.

  23. spraying METALS into our atmosphere is going to be out in the sun.

  24. It’а†s actually a nice and useful piece of info. I am happy that you shared this useful information with us. Please keep us up to date like this. Thank you for sharing.

  25. Live Murder says:

    I really liked your blog article.Really looking forward to read more. Really Cool.

  26. Say, you got a nice blog article.Really looking forward to read more. Cool.

  27. I truly enjoy looking at on this website , it contains fantastic articles.

  28. Wow! Thank you! I always wanted to write on my website something like that. Can I take a portion of your post to my site?

  29. Wow, great post.Really looking forward to read more. Really Great.

  30. visit says:

    Nice blog here! Also your website loads up fast! What host are you using? Can I get your affiliate link to your host? I wish my site loaded up as fast as yours lol

  31. Wow, great article.Much thanks again. Awesome.

  32. Wholesale Cheap Handbags Will you be ok merely repost this on my site? I ave to allow credit where it can be due. Have got a great day!

  33. info says:

    Really appreciate you sharing this article.Really looking forward to read more. Really Cool.

  34. This blog is no doubt cool additionally amusing. I have chosen a bunch of useful things out of this amazing blog. I ad love to return again and again. Cheers!

  35. Muchos Gracias for your article.Really looking forward to read more. Really Cool.

  36. guías says:

    Just Browsing While I was browsing yesterday I saw a excellent post about

  37. I was suggested this website by my cousin. I am not sure whether this post is written by him as no one else know such detailed about my difficulty. You are incredible! Thanks!

  38. Some truly interesting info , well written and broadly user genial.

  39. black friday says:

    Way cool! Some very valid points! I appreciate you penning this post plus the rest of the website is very good.

  40. Sherri says:

    You made some nice points there. I did a search on the topic and found most guys will consent with your website.

  41. Some truly great info, Gladiolus I detected this.

  42. It as not that I want to copy your web-site, but I really like the design and style. Could you let me know which theme are you using? Or was it custom made?

  43. Love says:

    wow, awesome blog post.Really thank you!

  44. The Silent Shard This can in all probability be very practical for many of one as job opportunities I want to really don at only with my web site but

  45. just go to says:

    They replicate the worldwide attraction of our dual Entire world Heritage sectors which have been attributed to boosting delegate figures, she said.

  46. Very good article! We will be linking to this particularly great article on our site. Keep up the good writing.

  47. view says:

    you have got an incredible blog right here! would you wish to make some invite posts on my weblog?

  48. Thanks for sharing, this is a fantastic blog.Really looking forward to read more. Will read on

  49. notatki says:

    the terrific works guys I ave incorporated you guys to my own blogroll.

  50. This is very interesting, You are a very skilled blogger. I ave joined your feed and look forward to seeking more of your wonderful post. Also, I ave shared your site in my social networks!

  51. this yyour bbroadcast providd vivid clear idea

  52. Thanks for sharing, this is a fantastic article.Much thanks again. Awesome.

  53. Major thankies for the article post.Really thank you!

  54. motorcycle accident claims What college-university has a good creative writing program or focus on English?

  55. I truly appreciate this post. I have been looking all over for this! Thank goodness I found it on Bing. You ave made my day! Thanks again!

  56. you writing this post plus the rest of the website is also

  57. some really good info , Gladiola I discovered this.

  58. secure dex says:

    woh I love your content , saved to favorites !.

  59. Very good blog.Really looking forward to read more. Cool.

  60. Very good article post.Much thanks again. Keep writing.

  61. This unique blog is no doubt educating as well as diverting. I have chosen a lot of helpful stuff out of this blog. I ad love to visit it again soon. Thanks a bunch!

  62. Thanks for any other fantastic post. Where else may just anybody get that type of info in such a perfect method of writing? I have a presentation next week, and I am at the look for such information.

  63. more info says:

    Muchos Gracias for your blog post. Fantastic.

  64. view site says:

    to carry this out efficiently, appropriately and safely.

  65. get url says:

    Thank you for your wonderful post! It continues to be very useful. I hope that you all carry on posting your wisdom with me.

  66. $c-owli says:

    It?s really a great and helpful piece of info. I am glad that you simply shared this helpful info with us. Please keep us informed like this. Thanks for sharing.

  67. This is really interesting, You are a very skilled blogger. I ave joined your rss feed and look forward to seeking more of your fantastic post. Also, I have shared your site in my social networks!

  68. bg says:

    Wow, superb blog layout! How long have you ever been blogging for? you make blogging look easy. The entire glance of your web site is wonderful, let alone the content material!

  69. buy kamagra says:

    This blog was how do you say it? Relevant!! Finally I ave found something that helped me. Cheers!

  70. We stumbled over here different page and thought I may as well check things out. I like what I see so i am just following you. Look forward to looking into your web page repeatedly.

  71. brujos says:

    Way cool! Some extremely valid points! I appreciate you penning this article plus the rest of the site is really

  72. Yay google is my queen assisted me to find this great internet site!.

  73. This is a set of phrases, not an essay. you are incompetent

  74. Superb, what a website it is! This weblog provides valuable information

  75. view website says:

    This is really fascinating, You are an overly skilled blogger. Ive joined your rss feed and stay up for looking for more of the good post. Also, Ive shared your website in my social networks!

  76. Way cool! Some extremely valid points! I appreciate you writing this article and the rest of the site is also really good.

  77. Nice info! Also visit my blog about Clomid challenge test

  78. pretty useful stuff, overall I consider this is really worth a bookmark, thanks

  79. privatni says:

    wow, awesome blog.Thanks Again. Much obliged.

  80. Tattoo says:

    It as hard to come by knowledgeable people for this topic, however, you sound like you know what you are talking about! Thanks

  81. qdC2yA It as nearly impossible to find well-informed people in this particular subject, however, you sound like you know what you are talking about! Thanks|

  82. sellos colop says:

    Very helpful info specifically the last part I care for such info a lot. I was looking for this certain information for a very long time. Thank you and good luck.

  83. Thank you for your blog.Thanks Again. Really Cool.

  84. tuzla says:

    Thanks so much for the blog.Thanks Again.

  85. This is really interesting, You are a very skilled blogger. I have joined your rss feed and look forward to seeking more of your magnificent post. Also, I ave shared your site in my social networks!

  86. go there now says:

    Starting with registering the domain and designing the layout.

  87. click here says:

    What as up, I check your blog daily. Your story-telling style is witty, keep up the good work!

  88. Thanks-a-mundo for the blog post. Great.

  89. This actually answered my problem, thanks!

  90. Some genuinely good blog posts on this website , regards for contribution.

  91. wb77asia says:

    Usually I do not read post on blogs, but I would like to say that this write-up very compelled me to check out and do it! Your writing taste has been amazed me. Thank you, very nice article.

  92. kamagra buy says:

    Very nice info and straight to the point. I don at know if this is in fact the best place to ask but do you folks have any ideea where to get some professional writers? Thanks

  93. chirurg mana says:

    You made some good points there. I did a search on the subject matter and found most individuals will approve with your site.

  94. Slot Online says:

    You made some clear points there. I did a search on the subject and found most guys will approve with your site.

  95. standard parts you happen to be familiar with but might not know how to utilize properly, along with other unique offerings in the car that ensure it is more hard to.

  96. I think this is a real great post. Awesome.

  97. I want to be able to write entries and add pics. I do not mean something like myspace or facebook or anything like that. I mean an actual blog..

  98. Wow, fantastic blog structure! How long have you been running a blog for? you made blogging glance easy. The full look of your web site is great, let alone the content!

  99. Really appreciate you sharing this blog.Really thank you! Really Great.

  100. Thanks again for the blog post.Really looking forward to read more. Really Cool.

  101. Valuable Website I have been reading out a few of your posts and i can state pretty nice stuff. I will definitely bookmark your blog.

  102. Really appreciate you sharing this post.Much thanks again. Cool.

  103. Thanks for the post.Thanks Again. Fantastic.

  104. Well I definitely enjoyed studying it. This article offered by you is very practical for good planning.

  105. go there now says:

    We think you should read this I am still learning from you, as I am trying to reach my goals. I definitely love reading all that is posted on your blog.Keep the tips coming. I enjoyed it!

Leave a Reply