Oil & Gas sector

API, ASME and PED certified components for upstream, midstream and downstream applications. Floating and trunnion ball valves, forged fittings, flanges and piping in steel and special alloys.

Certified for critical service

Oil & Gas applications demand the highest levels of quality, traceability and certification. Every component must withstand extreme pressures, temperatures and aggressive media while meeting stringent international standards.

Since 2015, Roffia has expanded internationally, supplying certified components to petrochemical plants across Italy, Europe and beyond. We partner with Valpres (Bonomi Group), Valbia, KSB and Spirax Sarco to ensure the highest quality and certification levels.

Solutions across the value chain

Upstream

Extraction and production: the most severe conditions. High pressures (classes 1500–2500), fluids with H₂S and CO₂, temperatures from -46°C to +200°C.

  • Trunnion valves with metal-to-metal seats
  • NACE materials: duplex, super-duplex, Inconel
  • API 6A certification for wellhead
  • FAT mandatory for major oil companies

Midstream

Transportation and storage: pipelines, compressor stations, terminals. Classes 300–600, carbon or low-alloy steel.

  • Trunnion DBB (Double Block & Bleed) valves
  • API 6D pipeline certification
  • Pneumatic and electro-hydraulic actuators
  • ESD valves with SIL certification

Downstream

Refining and distribution: variety of services (hydrocarbons, steam, acids, utilities). Mix of floating and trunnion, classes 150–600.

  • Fire-safe API 607 in process areas
  • Plug valves for viscous fluids
  • ATEX valves for classified zones
  • Forged fittings socket weld/butt weld

Ball valves — floating & trunnion

Floating and trunnion ball valves, classes 150–2500 lbs. Carbon steel, stainless, duplex, super-duplex, Inconel, Monel, Hastelloy. DBB, metal-to-metal seats. API 6D, API 607 fire-safe, NACE.

Plug valves

Lubricated and non-lubricated plug valves for viscous, abrasive and high-temperature services. Available in carbon steel and special alloys.

Forged fittings and flanges

Forged fittings ASME B16.11 (3000–9000 lbs) and flanges ASME B16.5 in A105, A182 F304/F316, A182 F51/F53, A350 LF2. Weld Neck, Slip-On, Blind, RTJ.

Seamless piping

Seamless pipes ASTM A106 Gr.B (high temp), A333 Gr.6 (low temp), A312 (stainless). Full traceability with 3.1/3.2 MTR certificates.

Actuators & gaskets

ATEX-certified pneumatic actuators, spiral wound gaskets, ring joint gaskets for high-pressure sealing. Complete valve+actuator assemblies.

NACE and sour service

Components compliant with NACE MR0175/ISO 15156 for H₂S-containing (sour) environments. Hardness ≤ 22 HRC, special heat treatments, HIC/SSC resistance.

Oil & Gas materials

Material Designation Typical application
Carbon steelA105, WCB, LF2Standard services, -46°C to +425°C
Stainless 316A182 F316, CF8MModerate corrosion, process water
Duplex 2205A182 F51Chlorides, seawater, offshore
Super-duplex 2507A182 F53Pitting, severe offshore environments
Inconel 625N06625High temperature + high corrosion
Hastelloy C-276N10276Maximum chemical resistance

Key Oil & Gas brands

Valpres Bonomi Group

Floating and trunnion ball valves in steel and special alloys. Industrial + Energy divisions. ISO 9001/14001/45001/50001. Marcheno (BS).

 Valbia

Double and single acting pneumatic actuators, control accessories. ATEX certified. Complete valve+actuator assemblies.

 KSB

Centrifugal pumps and valves for Oil & Gas processes. High-efficiency solutions for refineries and process plants.

In-depth guide

Ball valves for Oil & Gas: materials, classes and certifications

How to choose between floating and trunnion, the right material for each service, essential certifications and common mistakes. Complete guide with tables and checklist.

Read the guide →

Domande frequenti

What certifications are required for Oil and Gas components?
Key certifications: API 6D and API 6A for pipeline and wellhead valves; API 607 for fire-safe resistance; ASME B16.34 and B16.5 for valves and flanges; PED 2014/68/EU for pressure equipment; ATEX 2014/34/EU for explosive zones; NACE MR0175/ISO 15156 for sour service materials (H₂S); SIL for safety instrumented systems. Roffia supplies components certified to all these standards.
What is the difference between class 150 and class 300 flanges?
ANSI/ASME classes indicate maximum allowable pressure at ambient temperature: class 150 handles approximately 20 bar, class 300 approximately 50 bar (values decrease with temperature). Class 150 is sufficient for most low-pressure applications. For high-pressure/temperature Oil & Gas services, class 300, 600, 900, 1500 and 2500 are used. Bolt patterns are different and not interchangeable between classes.
Does Roffia supply petrochemical components?
Yes. Roffia supplies high-pressure valves (floating and trunnion ball, gate, globe, check, plug) in forged steel and special alloys, ANSI/ASME flanges in all classes, forged fittings socket weld and butt weld, and seamless piping in carbon and alloy steel. From our Cremona warehouse we serve refineries and petrochemical plants throughout Italy and internationally since 2015.
What is the difference between floating and trunnion ball valves?
In floating ball valves, the ball is supported by the seats and "floats" under pressure: ideal up to class 600 and sizes ≤ 8". In trunnion valves, the ball is fixed on upper and lower pins, with lower operating torque: suitable for classes up to 2500 lbs and large diameters, with DBB (Double Block & Bleed) functionality.
What is sour service (NACE)?
Sour service indicates the presence of hydrogen sulphide (H₂S) in the process fluid. Materials must comply with NACE MR0175/ISO 15156: maximum hardness ≤ 22 HRC, specific heat treatments, qualified welding. Non-compliant materials risk brittle failure from Stress Corrosion Cracking (SCC).

Need Oil & Gas certified components?

Contact us with your specification: API class, material, NACE requirements, quantities. We source and deliver certified components with full MTR documentation.

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