The Cove Business Standards Discussion Forums
API 4F - Clause 11.10.3 Bolt Pretensioning
UL - Underwriters Laboratories - Health Sciences
API 4F - Clause 11.10.3 Bolt Pretensioning
API 4F - Clause 11.10.3 Bolt Pretensioning
API 4F - Clause 11.10.3 Bolt Pretensioning
API 4F - Clause 11.10.3 Bolt Pretensioning
API 4F - Clause 11.10.3 Bolt Pretensioning
API 4F - Clause 11.10.3 Bolt Pretensioning
API 4F - Clause 11.10.3 Bolt Pretensioning
API 4F - Clause 11.10.3 Bolt Pretensioning
API 4F - Clause 11.10.3 Bolt Pretensioning
Go Back   The Elsmar Cove Business Systems and Standards Discussion Forums > >
Forum Username

Elsmar Cove Forum Visitor Notice(s)

Wooden Line

API 4F - Clause 11.10.3 Bolt Pretensioning


Monitor the Elsmar Forum
Sponsor Links




Courtesy Quick Links


Links Elsmar Cove visitors will find useful in the quest for knowledge and support:

Jennifer Kirley's
Conway Business Services


Howard's
International Quality Services


Marcelo Antunes'
SQR Consulting, and
Medical Devices Expert Forum


Bob Doering
Bob Doering's Blogs and,
Correct SPC - Precision Machining


Ajit Basrur
Claritas Consulting, LLC



International Standards Bodies - World Wide Standards Bodies

AIAG - Automotive Industry Action Group

ASQ - American Society for Quality

International Organization for Standardization - ISO Standards and Information

NIST's Engineering Statistics Handbook

IRCA - International Register of Certified Auditors

SAE - Society of Automotive Engineers

Quality Digest

IEST - Institute of Environmental Sciences and Technology


Some Related Topic Tags
api (american petroleum institute), bolts, validation of machines equipment processes design etc.
Reply
 
Thread Tools Search this Thread Rate Thread Content Display Modes
  Post Number #1  
Old 8th December 2017, 09:52 PM
rachel_t

 
 
Total Posts: 1
Please Help! API 4F - Clause 11.10.3 Bolt Pretensioning

Hi everyone

I'm new here, so please pardon me if I'm doing this wrongly.

Here's a little background about myself.
I'm Rachel, the QA Engineer for a local company in Singapore. Our company designs and fabricates steel structures, PV, piping systems for the Marine and Oil and Gas Industry. We are an API Q1, API 4F, ISO 9001 and ASME certified company. We were API certified since 2011 and we just had our surveillance audit 3 weeks back. I have no actual technical background and am just maintaining the quality management system.

During the audit, something was brought to our attention and unfortunately we were given a major NC for that. That is with regard to API 4F - Clause 11.10.3 Bolt Pretensioning. Which states "When a preload is specified by the design, bolt pretensioning shall be considered a process requiring validation. When such values are as specified in accordance with the values in AISC 335-89, process validation in accordance with the turn-of-the-nut method per AISC's Research Council on Structural Connections document "Specification for Structural Joints using ASTM A325 or A490 Bolts" is acceptable."

We fabricated a clamp sort of structure to hold down the master skid to the skid beams. We did not validate the clamps by testing because firstly, the clamps were not installed by us. It will be installed when it goes offshore. Secondly, this structure does not use fix bolts. These bolts will be removed and installed again whenever the platforms changes. Thirdly, the load required to conduct the test is just not feasible.

So my questions are,
1) How do we go about validating this process?
2) Does validation necessary mean testing? (Auditor mentioned that validation means testing)
3) Can a simulation (using computer software) be considered a form of validation method?
4) If this structure is not fixed, how do we ensure that the offshore installer will always remember to validate them before they go into operation.

We are kind of stuck here because the structure that we have finished fabricated and sent to the customer is not in operation (no bid for the platform yet). We are unable to validate this process. We cannot possibly ask our client to rig up the entire structure just for us to validate the bolt pretensioning process as it will cost us a lot of money and resources.

We really do not know how to address the correction and corrective actions for this NC.

Would anybody here be able to help me?

Much appreciation in advanced.

Regards,
Rachel

Sponsored Links
  Post Number #2  
Old 8th January 2018, 04:33 AM
r1ch481

 
 
Total Posts: 2
Re: API 4F - Clause 11.10.3 Bolt Pretensioning

Hi,

The easiest way close this NCR is to do a design calculation of the bolts, this will serve as a validation document. But you must also consider this as part of your validation points in your design and development plan. So you have to revise the design plan to put this process into consideration.

Hope it helps.
Thanks to r1ch481 for your informative Post and/or Attachment!
Reply

Lower Navigation Bar
Go Back   The Elsmar Cove Business Systems and Standards Discussion Forums > >

Bookmarks



Visitors Currently Viewing this Thread: 1 (0 Registered Visitors (Members) and 1 Unregistered Guest Visitors)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Forum Search
Display Modes Rate Thread Content
Rate Thread Content:

Forum Posting Settings
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Emoticons are On
[IMG] code is On
HTML code is Off


Similar Discussion Threads
Discussion Thread Title Thread Starter Forum Replies Last Post or Poll Vote
Looking for Bolt Thread Specifications for Delrin & Aluminum uskarlito Inspection, Prints (Drawings), Testing, Sampling and Related Topics 3 19th September 2013 09:09 AM
What's meaning of T series for a bolt or nut? andy.yuan Supplier Quality Assurance and other Supplier Issues 3 13th September 2011 08:38 PM
FMEA for Bolt Manufacturing - Example wanted Your Soap FMEA and Control Plans 44 2nd June 2011 05:28 AM
Fastening Process Cmk study - Bolt Torque Larry.Jiang Statistical Analysis Tools, Techniques and SPC 1 20th May 2009 04:19 PM
Design of Dimensional Measurement Gage for Bolt nishant55555 General Measurement Device and Calibration Topics 13 25th April 2009 07:23 AM



The time now is 07:35 PM. All times are GMT -4.
Your time zone can be changed in your UserCP --> Options.



Misc. Internal Links


NOTE: This forum uses "Cookies"
The Elsmar Cove web site and all content is owned by Rabbithash Corp. as of 1 MAY 2018.
Unlike Facebook and other properties such as Linkedin, We don't buy, sell, or "share" visitor information. Never have, Never will...
GDPR Compliant since 1996, keeping Marc's vision alive!