Production

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General Data

From 1995 to 2020: More than 2,800 items per year.
Thickness: From 3 mm to 200 mm.
Pressure: From 0,5 bar to 1.185 bar.

Welding

Since the beginning, GBM extremely gives importance to the core production process: the Welding. In 1962 GBM was one of the first Italian companies to use the Automatic Submerged-arc welding process (SAW) in the production cycle.

In our company a 3^rd level welding Inspector (then EWT – European Welding Technologist) is present since 1980.

All our welding processes:

GTAW, SMAW, GMAW, FCAW, SAW, ESW as far as.
TUBE to TUBESHEET (Manual, Semiautomatic and automatic GTAW welding or Hydraulic and Mechanical CNC tube expansion).

are continuously updated and supported by main international Codes.

All our weldings are made according to Welding Procedure sheets (WPS), supported by Welding Procedure Qualification Record (WPQR), qualified by Recognized Bodies.
All our Welders and Operators are qualified and certified (WPQ) for all the main welding techniques used in vessel manufacturing and comply with the severe test criteria set by the international standards and verified by the main test authorities.

Tube to tube-sheet automatic Gtaw welding

High pressure Channel - Superduplex material - T 160 mm.

Preparation of Nozzle (Cladded)

High Pressure O2 Preheater - JGC - Shell Pearl Prj. Qatar - Elbow manual Arc welding

Burner for preheating and maintaining the temperature during welding process

Nozzle hole preparation before weld in high wall thikness (s > 85 mm)

View on SS tube to tube-sheet welded joint

Extra lips self reinforcement Nozzle

First layer of Gtaw welding

Main weld in the high thickness wall (s > 80 mm.)

Superduplex high thickness welding (t > 160 mm.)

Main weld in the high thickness wall (s > 100 mm.)

Gtaw welding on Heat exchanger bundle (Naval Brass alloy)

High thickness shell during manufacturing

Gtaw Welding on SS of main Joint (first layer without any support)

High thickness shell during manufacturing

Long. multipass weld Joint (and its section) SS Material

Big nozzle welding oin our manufacturing shop

Gtaw Welding on circumferential Joint (first layer without any support)

Tube to tube-sheet Gtaw welding

Finishing

GBM can supply items with following finishing:

Sandblasting – Painting – Pickling and Passivation – Polishing – Coatings as Thermal Spray aluminium or other special surface treatments.

Internal surface: Rich zinc / Epoxy coated – EPDM / Ebonite / PTFE / Glass lining – Mirror / electro-polished.

Internal Polishing on SS - Nozzle detail

Cutting test on Paint

Inspection with Wood light (O2 cleaning)

Internal cleaning checking (indirect)

Example of Wooden boxes

Paint of flanged nozle with reinf. pad

internal view of sandblasted vessel (separator)

Blowback spray nozzles - Filter Interrnal PFA lined - Tecnimont - Borouge 2

Paint finishing example

internal vitrification view

internal vitrification - detail of tube to tube-sheet joints

Example of paint on nozzles and lifting hooks

Bag Filter - Internal Polishing on SS

SS Vessel after pickiling and passivation

Internal Inspection with Camera (O2 cleaning)

Example of packing accessories

example of packing (barrier bag)

Thermal Spray Aluminum (TSA) - Metallisation

Inibhitor Sponge (VPCI)

example of terminal side of paint (eack layer)

DFT dry film thicknes gauge measuring

example of packing

Internal rubber lining detail

Blowback spray nozzles - Filter Internal PFA lined

example of paint

Checking of the Paint thickness (DFT)

Internal rubber lining view

Packing of Pinhair Heat-exchanger

Nitrogen filling before shipment

Internal view of SS Heat Exchanger after clening

Adhesive Test on Painting

Surface Testing

Painted Coupons for Testing

Internal rubber lining detail

Example on internal paint (SS accessories not painted)

Example of internal lining

Adhesion test on each layer of paint

Internal Polishing on SS

Bag Filter - Internal view of blowback nozzles

Bag Filter - Internal Polishing on SS

Machining

Our internal machining department is equipped with following machines:

CNC Lathes – CNC Work centres (horizontal – Bridge) – CNC Milling machines – Drills.

Our company is able to work internally diameters up to 1600 mm. and pieces with weight up to 5 tons.

Self reinforcement nozzle during turning at CNC lathe

CNC Double columns machine center

Our skilled worker operating at manual Lathe in our shop

CNC Lathe working

Our CNC 4 axis Horizontal Milling Machines working on self reinforced Nozzle

Our CNC Machine Center - 1270 X 650 X 630

Operator at automatic CNC Lhate

Vertical CNC Machine Center

Our CNC Double Column Machine Center - 1500 x 3250 x 780

Self Reinforced nozzle machined

Our CNC Machine Center - 1270 X 650 X 630

Our CNC 4 axis of Horizontal Milling Machines

Our CNC 4 axis Horizontal Milling Machines - 1300 x 6000 x 2500

Tube-sheet machining under our Vertical CNC Machine Center

Self Reinforced nozzle machining

Self Reinforced nozzle machined in our shop

CNC Lathe 1200 mm. capacity