Recent content by johnthebest

@SnTMan I just wanna know what is the common practice and if the Man way davit has to be tested or it just follow the design standards.

Hello everyone As per our project specification: "Davits shall be tested to a safe working load 25% greater than the weight to be lifted. The safe working load shall be stamped on the davit following the test." The contractor claims that this clause is only applicable to the top davit that is...

We are on the go of a central processing facility project. our contractor claims that in order to match the CV of the conrol valves (as per ASME B16.34) and the manual globe valves (as per API 623) (which serves as a by-pass of the control valves and will be operated only in case of maintenance...

Hello everyone, I got a tehcnical query from the contractor stating the following: "At present, in Piping Material Specification, Pipes & Fittings are specified as ASTM D1785 & ASTM F491 respectively. However, being non-pressurized underground piping, contractor understands that PVC pipes as...

and the reason for deviating from the spec is to save time and avoid procuring and then send it for impact testing

@ david339933 exactly. the contractor stated that this material is already impact tested.

Design Temperature range for offered Pipe material A333-6 SMLS is -21 to 215 Deg. C and the process design temperature requirement is -5 to 90 Deg C.

the normal operating temperature is 60 C°

Hello everyone in our piping material specification we required the material A106-B SMLS (Impact tested) for a specified class (10 Inch and above) our contractor proposes the use of the material A333-6 SMLS without impact testing justefying that this is a higher material and doesn't need...

Hello everyone Based on the API 661 standard, there are 4 Plenums types. I want to know the difference between the first two types: a) Forced draught- Box plenum b) Forced draught- Transition plenum Advantages, disadvantes. thx in advance

I just got a reply from the contractor that the partial pressure of H2S is too low that leads to NACE is not applicable. Plus his understanding is that when required means if it is required by the process or the code. so this clause limitation is not a must to do.

@SJones From what I understood, there is a deviation made by the contractor regarding the spec clause.

Actually the spec was made by a third party. what I want is to an interpretation from a contractual point of view.

Hello everyone I would like to have your help about this technical query In our project specification, we said the following: when required, hardness test shall be performed on.... "see page 3 of 3 in the attached file" The contractor is proposing the following: For P1 material weld and HAZ...

Hello everyone I wanna your opinion about deviations made by the vendors regarding our project specification: --------------------------------------------------------- 1. SPECIFIED REQUIREMENT Seat Material -RPTFE 1*. COMMENTS / DEVIATIONS OFFERED BY SUPPLIER "vendor valves has offered Devlon...