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Mr. Frikken is an internationally recognized authority in piping systems, valves, and the development of standards and specifications. His work with Becht includes designing new piping systems, analyzing existing piping systems, assisting manufacturers with respect to code compliance issues, and providing instruction on process piping and piping flexibility analysis courses. Don has received a number of awards including the ASME B31 Forever Medal for Excellence in Piping, and the ASME Melvin R. Green Codes and Standards Medal in 2002, which recognizes outstanding contributions to the development of documents used in ASME programs of technical codification, standardization and certification.

He received the ASME Fellow Award in 1994 and the ASME Dedicated Service Award in 1995. Prior to joining Becht Engineering, Don spent 34 years with Solutia, Inc. and Monsanto Company working on a wide range of activities including piping and mechanical design, project engineering, and engineering standards. Mr. Frikken is a registered PE in Missouri.

ASME B31.3 - Substantive Changes in the 2018 Edition for Process Piping

B31-3_ASME
In addition to the many clarifications, updated references to codes and standards, updates to basic allowable stresses, and added listed materials, there are several substantive changes to the 2016 Edition of ASME B31.3, Process Piping, which is scheduled to be issued mid-January 2019. These substantive changes are: Owner Added specific permission for the owner to designate a representative to carry out selected responsibilities required by this Code, and noted that the owner retains ultimate responsibility for the actions of the representatives. Flange Design Added the ASME B&PV Code Section VIII, Division 2, para. 4.16 flange calculation method as an acceptable way to design flanges for B31.3 applications. The Division 2 procedure considers pressure, gasket seating, and externally applied axial forces and net-section bending moments. Stress Intensification and Flexibility Factors Added specific references to ASME B31J-2017 as a resource for stress intensification and flexibility factors as an alternate to Appendix D. High Cycle Fatigue...
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ASME B31.3 - Substantive Changes in the 2016 Edition

ASME B31.3 - Substantive Changes in the 2016 Edition
In addition to the many clarifications, updated references to codes and standards, updates to basic allowable stresses, and added listed materials, there are several substantive changes to the 2016 Edition of ASME B31.3, Process Piping, which is scheduled to be issued on January 4, 2017. These changes are: Severe Cyclic Conditions The definition for severe cyclic conditions was changed. Old Definition: conditions applying to specific piping components or joints in which SE computed in accordance with para. 319.4.4 exceeds 0.8 S A (as defined in para. 302.3.5), and the equivalent number of cycles ( N in para. 302.3.5) exceeds 7000; or other conditions that the designer determines will produce an equivalent effect. New Definition: conditions applying to specific piping components or joints for which the owner or the designer determines that construction to better resist fatigue loading is warranted The new definition is expected to lead to a more appropriate application...
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Don Frikken

2016 Edition - Category M

In my opinion, doing as you suggest would not comply with the rule. The Code requires the welds to be radiographically or ultrason... Read More
Thursday, 09 May 2019 14:37
Don Frikken

Brother in law

For B31.3 piping, one welder can finish all of the passes for a weld.
Tuesday, 17 April 2018 19:14
Don Frikken

It is not a Code requirement.

ASME B31.3 has no such requirement...it does not get into that much detail about documentation for radiographic examination. Perha... Read More
Wednesday, 21 March 2018 19:46
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ASME B31.3 - Substantive Changes to 2014 Edition

ASME B31.3 - Substantive Changes to 2014 Edition
In addition to the many clarifications, updated references to codes and standards, updates to basic allowable stresses, and added listed materials, there are several substantive changes to the 2014 Edition of ASME B31.3, Process Piping. These changes are: Category M Fluid Service The definition was revised in the 2014 edition to provide better guidance on selection of the Category M Fluid Service designation (b) Category M Fluid Service:  A fluid service in which all of the following apply: (1) The fluid is so highly toxic that a single exposure to a very small quantity of the fluid caused by leakage, can produce serious irreversible harm to persons on breathing or bodily contact, even when prompt restorative measures are taken; and (2) If after consideration of piping design, experience, service conditions, and location, the Owner determines that the requirements for Normal Fluid Service do not sufficiently provide the leak tightness required to...
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Recent Comments
Don Frikken

RE:Use of Maximum value of SL ...

I’m not sure I understand your question, but I will try an explanation and you can ask again if what I say does not help. SL for ... Read More
Sunday, 15 March 2015 11:21
Don Frikken

RE:RE:RE:Use of Maximum value ...

When we did these calculations using less sophisticated methods than are available today with the various computer programs, we di... Read More
Saturday, 28 March 2015 11:08
Don Frikken

Thermal Shock Definition

You discovered a problem with what we did. There is no definition in the 2016 edition. We did better with a revision that will be ... Read More
Friday, 08 June 2018 15:21
Don Frikken

RE: Thermal Shock Definition

Since the Code does not define thermal shock, it is up to you to decide whether or not 0.65 to 0.80 C/sec is thermal shock. Depend... Read More
Friday, 08 June 2018 16:49
Don Frikken

RE:Heat Treatment

The 2014 edition does not require heat treatment of P No. 1 materials for any thickness if the material is preheated to 95 C and m... Read More
Thursday, 07 January 2016 12:49
Don Frikken

RE:Hardness Limits

There will be no addenda...we don't do that anymore. I expect it will be corrected in the 2016 edition. There are no limits in the... Read More
Thursday, 10 December 2015 16:35
Don Frikken

RE:ASME PTC19.3 TW 2010 not re...

It is para. 306.6. It says: Thermowells shall comply with ASME PTC 19.3 TW where applicable.
Tuesday, 05 May 2015 16:46
Don Frikken

RE:Mechanical Engineer

1) In my opinion, you are comparing the calculated thickness in para. 331.1.3(b)(5) to the control thickness. So for P1 materials,... Read More
Sunday, 15 March 2015 11:07
Don Frikken

RE:Mechanical Engineer

1) In my opinion, you are comparing the calculated thickness in para. 331.1.3(b)(5) to the control thickness. So for P1 materials,... Read More
Sunday, 15 March 2015 11:08
Don Frikken

Hydrotest Pressure

In the 2014 edition of B31.3, the hydrotest pressure is still 1.5 times the design pressure corrected for temperature. The way the... Read More
Sunday, 15 February 2015 09:58
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Changes In the 2012 Edition of ASME B31.3

In addition to the many clarifications, updated references to codes and standards, updates to basic allowable stresses, and added listed materials, there are several substantive changes to the 2012 Edition of ASME B31.3, Process Piping. These changes are: Category D Fluid Service The definition was revised to include piping with design minimum temperatures below -29⁰C (-20⁰F) if the cause of the lower temperature is from ambient conditions. Allowable Displacement Stress Range The allowable displacement stress range was limited to 60,000 psi (414 MPa) in the 2012 edition. High strength steels have higher yield and tensile strengths and thus higher allowable stresses. Therefore, they also have higher calculated allowable displacement stress ranges when calculated using the old formula. However, these materials have fatigue strengths similar to the more common steels, which is why the limit was added. Flexibility Stress Equation The axial stress was added to the flexibility stress equation. While axial...
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Recent Comments
Don Frikken

Summary of substantial changes...

Yes, I can provide that. Just send me an email request at dfrikken@becht.com.
Friday, 08 March 2019 09:48
Don Frikken

RE:Allowable Displacement Stre...

Limiting Sc and Sh to 138 MPa applies no matter what the value of f is. Without this limit, the allowable stress range could be hi... Read More
Sunday, 03 May 2015 09:03
Don Frikken

RE:Allowable Stress Sc & Sh fo...

High strength steels have about the same fatigue resistance as low strength steels, especially for low cycle fatigue. Using the hi... Read More
Monday, 16 March 2015 09:51
Don Frikken

RE:RE:RE:Allowable Stress Sc &...

Even when the stress range is less than two times yield, the materials cannot be cycled forever without failure. That is why the C... Read More
Tuesday, 17 March 2015 10:37
Don Frikken

RE:withstand

I'm not familiar enough with ASME B&PV Code Section IX to know if there is an exception to the rule you describe. If the material ... Read More
Friday, 06 February 2015 09:17
Don Frikken

RE:RE:RE:withstand

That revision was made as part of a general update to para. 328. I’m pretty sure no one recognized the problem with the deletion o... Read More
Friday, 06 February 2015 12:35
Don Frikken

RE:RE:RE:RE:withstand

I sent the request to the committee. I already have a response from Phil Flenner. He says: The test bend requirements of Section I... Read More
Friday, 06 February 2015 15:41
Don Frikken

MPa Stress table - response

The ASME B16.5 ratings are based on data supplied by the B&PV Code Section II Committee. In some cases, the MPa values are derived... Read More
Tuesday, 10 December 2013 11:31
Byron Laird

Allowable Displacement Stress ...

Dear Don, Thanks for your article, very informative. Referring to your comment on the allowable displacement stress range. I can ... Read More
Wednesday, 11 September 2013 18:16
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