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KevinNZ , is there a value for Peak ground acceleration (PGA) that is recommended to go to ASME B31E ? ap/Rp values will not be the same correct. What will be impact to go the ap/Rp values for ASME B31E instead of B31.3 ? because the contribution for the sustained and pressure loads are...

Hi GD2 In the contract the program used is Ceaser II and the design code is ASMEB 31.3 There requirements from ASME B31E are already on AutoPipe but did not find that they are in Ceaser II. They will continue using Ceaser II and still with ASMEB 31.3 by sure As a client we can accept to go for...

The contractor has proposed to go higher that the allowable code limit to 1.5 times the basic allowable stress for carbon and low alloy steel. Looking to the safety margin given between the allowable B31.3 code limit and the yield strength for some temperatures some with reach the yielding point...

Thanks MJCronin, I will GD2. the contractor is specialist in determining the seismic Load for a Piping System for Green chemical plants. They are working with an earthquake design spectra and due to that they are facing hight seismic acceleration factors. KevinNZ In the project have a table...

Any help ?

Hi My contractor is facing some issues with the stress calculations due to high seismic acceleration values since they are not able to keep bellow the allowable code limit i.e. 1.33 times the basic allowable stress ( ASME B31.3). ASME B31.3 in parag. 302.3.6 refers to a Design Earthquake...

Good question to me. I thought that reading ASME B16.11 chapter 6.3 all fittings threads shall be threaded internal and external according with the NPT American National Standard Taper Pipe Threads (ASME B1.20.1). According to the version I have, the types of pipe threads cover by this standard...

Hi What is the service ? Hydrogen ? Which code you're using ? ASME B31.3 ? Piping material ? ASTM A-106 Gr. B ? Where do you see that Reducing Tee as per ASME B16.9 is more common used for this pressure? For ASME B31.3 and 2500# CS I use weldolet 3x2 and for 4x2 required weld sean for...

Hi What is the Duplex steel type ? Chemical composition ? What is the service ? Project conditions ? Why is that you are using bolts & washers are in stainless steel 304 or 316 grade and not other type of materials ?

Hi You shuold choose the most commonly-used pipe grade that meet the guidelines that should be used when selecting the pipe material like: - Special welding procedures - allowable stress value (according B31.3) - Service - Resistance to Bright Fracture - Corrosive Hydracarbon Service...

Hi LittleInch We think it is better to weld pipe to pipe and avoid two welds so close to each other due to very high heat input to the material between the two welds like you said. Thanks for your help to see in B31.3 something about it. Regards

Hi all I would like to ask if is possible or is not recomended to weld pipe to pipe a 12" line ( Ventline for Drillship)instead of cutting a 45 Deg elbow for a 2.6 Deg. In my opinian since the service is not for high pressure, high temperature or cycling, vibrating but the 12” line can been...

Hi Do you now where I can find some information about the design for pipe clamps ( service: Mud 700 bar rating 10000, Cement and Production 1000 bar rating 15000 ) like plate thikness, radius , bolts, holes diameter etc. as minimum Pipe Material AISI 4130 PER NACE Thanks

Monicaher80, In MSS SP-80-2003 Bronze Gate, Globe, Angle and Check Valves is your answeer.