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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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Recent Comments
Guest — Sharun Suresh

Flange Design

As per your quote "Added the ASME B&PV Code Section VIII, Division 2, para. 4.16 flange calculation method as an acceptable way to... Read More
Wednesday, 13 November 2019 03:12
Don Frikken

Flange Design

The 2016 edition permitted flange design in accordance with Division 2 for high pressure fluid service only. The 2018 edition adde... Read More
Wednesday, 13 November 2019 08:20
Guest — Bilal Shah

Occasional Allowable per Appen...

Thank you Mr. Frikken for your response. This is very insightful. To clarify my understanding: 1. On using appendix V for calcula... Read More
Friday, 08 November 2019 05:28
Don Frikken

Occasional Allowable from Appe...

My normal approach would be to work my way forward through the calculation, then test to see if the usage factor was less than or ... Read More
Friday, 08 November 2019 12:07
Guest — Bilal Shah

Occasional Loads Allowable Cal...

Thank you for the excellent summary. Any comments on: Changes to alternate occasional allowable stress calculations which now tak... Read More
Thursday, 07 November 2019 02:53
Don Frikken

Occasional Loads Acceptance Cr...

While the revisions to para. 302.3.6 were mostly for clarification, you are quite correct in point out some substantive changes we... Read More
Thursday, 07 November 2019 15:32
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6 Comments

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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Recent Comments
Guest — Mindy

2016 Edition - Category M

In addition to the percentage change from 20% to 100%, they have also included branch connection conforming to 328.5.4F (Integrall... Read More
Thursday, 09 May 2019 11:32
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
Guest — juan Diaz

b31.3

Do u have to brother in law a 24" after it has the root and hot pass on b31.3 or can one welder just finish it out ... Read More
Saturday, 14 April 2018 20:54
Guest — Darryl

Is it a code requirement under...

Do you have to list each exposure for each radiograph. Ex 4” sch 40 3 exps. 0-12/ 12-24 / 24-0
Sunday, 18 March 2018 19:09
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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6 Comments

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
Guest — M. Mistry

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

Thanks for your prompt response. Your explanation is definitely going to help. But I would have further more questions; Up till no... Read More
Tuesday, 17 March 2015 02:26
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
Guest — MJ

Thermal Shock Load Definition

Hi Don, If my flare header (SA333) metal temperature becomes colder from amb. temp (e.g. 0C or -45C) to -45 in 30 to 40 seconds, ... Read More
Friday, 08 June 2018 14:23
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
Guest — MJ

RE: Thermal Shock Definition

Thanks Don for prompt respond. Right now my case is dealing with ed 2016. In reality I'm dealing with a cooling rate of 0.65 to 0... Read More
Friday, 08 June 2018 15:47
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
Guest — Pedro Junior

Heat Treatment

I have just one query regarding the Post Welding Heat Treatment as per ASME B31.3_2014, what is the minimum thickness for PWHT in ... Read More
Wednesday, 23 December 2015 08:49
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
Guest — Andre Mariano

Hardness Limits

I can´t find the hardness limits for welds in 2014 Edition of B31.3. Also paragraph 331.1.7 is missing. Is there any adenda to th... Read More
Monday, 07 December 2015 10:58
21849 Hits
26 Comments

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
Guest — Jayaprakash

Summary of substantial changes...

Hi Don, Appreciate your efforts in providing these useful information. Do you have a summary of all the substantial changes to AS... Read More
Friday, 08 March 2019 09:17
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
Guest — sharu

Allowable Displacement Stress ...

Dear Sir, Regarding the statement. "The allowable displacement stress range was limited to 60,000 psi (414 MPa) in the 2012 editio... Read More
Wednesday, 29 April 2015 02:09
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
Guest — Asish Kumar Mishra

Allowable Stress Sc & Sh for h...

Hello. As per Sec 302.3.5 of B31.3 V2012 &2014, the max. allowable stress of Sc & Sh to 20000psi can you please explain the reas... Read More
Sunday, 15 March 2015 22:47
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
Guest — Asish Kumar Mishra

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

Thanks for your reply. I am still not clear on, 1. Why to consider fatigue when in general the displacement stress range is with t... Read More
Monday, 16 March 2015 21:07
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
Guest — Vincent Chaume

withstand

For a unclassified ASME IX material, which cannot fulfill the requirements of ASME IX for bend test (cannot bend at 180° at room t... Read More
Friday, 06 February 2015 06:02
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
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18 Comments

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