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  1. vcmkumar

    B7 stud bolts for low temperatures (-45¦C)

    Thanks metengr, Concern is some standards specific to flange bolting like AS2528 or DS-EN-1515-1 give the lower limit as -30ºC or even higher. Why the discrepency between standards? Also, if you note the following from ASME B16.5: "2.5.3 Low Temperature. Some of the materials listed in...
  2. vcmkumar

    B7 stud bolts for low temperatures (-45¦C)

    I am trying to specify ASTM A193 B7 stud bolts for A105 or A350 LF2 flanges for low temp down to -45ºC. AS4041 Table G1 allows for the bolts, a min temp of -30ºC with Carbon steel flanges (min yield 240 MPa), but -48ºC with low alloy steel flanges (min yield 724 MPa). Why is the min. temp of...
  3. vcmkumar

    api 5l x70 heavy wall pipe

    thread330-171299: Following the above thread, appreciate if anybody could advise if API 5L X70 heavy wall (above 19 mm) pipe welds would need post weld heat treatment or what are the points to consider while welding such pipes to say items like Monolithic Insulating Joints.

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