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Concession Request

1) The Kipushi Zinc Project requested a concession to use HDGI foundation bolts instead of electro-galvanized bolts as specified in the drawings. 2) Hot dip galvanizing provides much better corrosion resistance than electro-galvanization for foundation bolts. 3) The request was made by Mitendra Chauhan, QA/QC at Mining Chemical Suppliers and recommends accepting the request due to hot dip galvanizing's higher corrosion protection and longer lifespan of 20-50 years compared to only several months to years for electro-galvanization.

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273 views1 page

Concession Request

1) The Kipushi Zinc Project requested a concession to use HDGI foundation bolts instead of electro-galvanized bolts as specified in the drawings. 2) Hot dip galvanizing provides much better corrosion resistance than electro-galvanization for foundation bolts. 3) The request was made by Mitendra Chauhan, QA/QC at Mining Chemical Suppliers and recommends accepting the request due to hot dip galvanizing's higher corrosion protection and longer lifespan of 20-50 years compared to only several months to years for electro-galvanization.

Uploaded by

mitendra singh
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We take content rights seriously. If you suspect this is your content, claim it here.
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Format No: MCS/KICO/CR-001

MINING CHEMICAL SUPPLIERS SAS Rev. No: 00


Effective Date: 30/8/2022
Page 1 of 1
CONCESSION REQUEST FORM

Name of Project: Kipushi Zinc Project Concession Request No: 002

Project No: 0045 Date: 14/10/2022

Contract P/O No: X001AB


Description of Deviation / Query Requested (define all attachments):

To use, we have received foundation bolt on 09/12/2022 according to BOQ specification (HDGI Foundation bolt)
instead of Drawing Specification (Electro-galvanized)

Routine  Urgent Please refer the attachment (HDGI Information)


Proposed Action (define all attachments):
Hot dip galvanizing provides much better corrosion resistance than electro galvanization foundation bolts

Request By (Name/position): Mitendra Chauhan - QA/QC

To be Completed by Requesting Engineer/Manager


Comments / Recommendations by requesting Engineer:
HOT DIP GALVANIZING. Hot dip galvanizing (HDG) is also a common surface coating for steel fasteners. It provides a
very solid and durable corrosion protection. Hot dip galvanizing for steel parts is standardized in ISO 1461
Electro-galvanization has very low life, ranging from several months to some years only. But hot dip galvanization is
known to have very high life averaging between 20 to 50 years.

Remarks:

Engineering Decision
Accepted Accepted (with comments) Reject
QA/QC
Project Construction
Requesting By MCS Manager/Engineer METC(EPCM) KICO (client)
Manager (MCS)
(MCS)

Date: 10/12/2022 Date:10/12/2022 Date: Date: Date:

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