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guaranteed at the level defined by Construction co-
des and Project requirements.

Personnel Management
The human factor should be taken in consideration
as key factor in order to guarantee the product final
Quality.
The tightening operators and in general all techni-
cians involved in the tightening works have to at-
tend dedicate training according to International
Codes and Standards.
In general the theoretical knowledge is combined
with the practical training, in order to proof that
required skill has been gained in accordance with
operative procedures.
A specific Training Plan has to be set according
to Project requirements and approved by an inde-
pendent review Organization, therefore a Qualifying
Body has to be appointed.
Fig. 3 – Bolt Torquing with Hydraulic Tools The Training Plan contents shall include at least:
• Principles of bolt elongation, load and gasket
stress;
Joints; • Functionality of gasket and seal;
• Bolts, gaskets and lubricants; • Gasket and lubricant type and their correct
• Equipment and tools; handling and installation;
• Tightening procedure • Identification of correct joint components;
• Joints traceability and tagging; • Bolt types and characteristics;
• Inspection and testing. • Calibration and maintenance of bolt-tightening
equipment and tools;
Material Management • Joint assembly procedures and tightening se-
During all stages of the Project, the traceability of quences, including techniques used for load /
the elements belonging to the Flanged Joints has torque control;
to be guaranteed. It means the correct and uni- • Inspection and testing;
vocal identification of all original materials. The level • Quality assurance procedures, certification
of traceability should be defined by Project requi- and records.
rements. In general, it is possible to consider two
types of raw material: Inspection and Test Plan
• parent material including, as example, flanges, To properly control the execution of the tightening
gasket, bolts and nuts; works, the (Main) Contractor shall define an In-
• consumable material (i.e. lubricants); spection and Test Plan listing the Quality Control
In both cases, the traceability of material must be tasks to be performed in order to guarantee the

Sistema di gestione integrato

per giunti flangiati di tubazioni

Le attività di serraggio controllato dei giunti flangiati delle linee tubazioni per la loro criticità vanno
considerate processi di lavoro speciali e gestite come le attività di saldatura.
Date le variabili in gioco è necessario definire un sistema di controllo integrato che partendo dalle fasi
inziali di progettazione segua tutte le fasi dell’esecuzione.
Considerando quanto sviluppato in Technip Italy, l’articolo vuole mettere in risalto quali debbano
essere i principali aspetti da considerare al fine di assicurare che l’accoppiamento flangiato garantisca
le performance richieste in termini di Qualità e affidabilità, con una speciale attenzione ai requisiti
da imporre alle attività in cantiere, al fine di perseguire l’adeguato livello di controllo ottimizzando
l’efficienza.
Dato l’ingente numero di accoppiamenti flangiati in un tipico impianto petrolchimico, l’applicazione
informatica al suddetto sistema integrato, consente inoltre di gestire il considerevole flusso di dati
necessario al corretto tracciamento e certificazione di Qualità nelle varie fasi esecutive.

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