_____________________ (Paolo Marcone)

C E R T I F I C A T E

I-722217263/20

The company

OFFICINE MECCANICHE DECA S.r.l.

VIA GALILEO GALILEI 2

I-20090 SEGRATE (MI)

fulfils the Comprehensive Quality Requirements according to

DIN EN ISO 3834-2

for the range mentioned in the enclosure to this certificate.

The certificate expires in March 2023

Order No. 722217263

Milan, March 30th 2020

TÜV SÜD Industrie Service GmbhWestendstraße 199, D-80686 München

Enclosure to certificate

Order No. 722217263

Page 1 of 2

The following range is certified acc. to DIN EN ISO 3834-2:

Scope of production: heat exchangersfor chemical and petrochemical plants

Base metals: - steels group acc.to ISO/TR 15608:1,8, 11 , 31-34, 51

Max. dimension of items: Up to 15,4 mm thickness , max diameter 219 mm , 8 m lenght

Welding processes: 136 MAG welding with flux cored electrode138 MAG welding with metal cored electrode141 TIG welding with solid filler material (wire/rod)311 Oxyfuel welding

111 Manual metal arc welding

Welding supervisor: Mr. Mauro Fusari ( EWS)

Substitute(s) of the welding supervisor: Mr. Ivano Boselli

Personnel for Non Destructive Testing (NDT):

Responsible: Mr. Mauro Fusari ( PT2-VT2)Substitute(s): - Mr. Luoni Giovanni (PT3-VT3-RT3-UT3-MT3-LT3)

All other relevant data are detailed in our report No. 722217263.The general regulations (see next page) have to be regarded.