Pipes and bars

Carbon steel, stainless steel, polyethylene and press-fit piping systems for industrial plants. From steam mains to gas distribution, from potable water to biogas.

The backbone of every plant

Piping is the structural backbone of every industrial installation: it connects components, conveys fluids, and withstands pressure and temperature. Choosing the right material, diameter, wall thickness and manufacturing standard is critical for safety, efficiency and long service life.

Roffia stocks a wide range of pipes and bars in the most-requested industrial materials, with cut-to-size service and fast delivery from Cremona.

Carbon steel pipes

The most widely used material in industrial piping. Available welded (ERW) and seamless to EN and ASTM standards.

Welded pipes

  • EN 10217-1 (P235GH) — pressure service up to 300°C
  • EN 10255 (S195T) — gas distribution
  • EN 10219 — structural
  • ASTM A53 Grade B — American standard

Seamless pipes

  • EN 10216-2 (P235GH / P265GH) — pressure and temperature
  • ASTM A106 Grade B — steam and high temperature
  • ASTM A333 Grade 6 — low temperature (-46°C)

Stock sizes: DN 15 (½") to DN 300 (12"), wall thickness SCH 10 to SCH 160. Lengths: 6 m bars, cut to size available.

Stainless steel pipes

For applications where corrosion resistance is critical: food & beverage, chemical & pharmaceutical, potable water, aggressive environments.

Grades

  • AISI 304 (1.4301) — most common, good general resistance
  • AISI 304L (1.4307) — low carbon, for welding
  • AISI 316 (1.4401) — superior resistance (chlorides, acids)
  • AISI 316L (1.4404) — low carbon, food and pharma

Standards

  • EN 10217-7 — welded for pressure
  • EN 10216-5 — seamless for pressure
  • ASTM A312 — American standard
  • Finish: pickled, satin, electropolished (food grade)

Stock sizes: DN 10 (⅜") to DN 200 (8"), wall thickness SCH 5S to SCH 40S.

Polyethylene pipes (PE)

HDPE piping for gas distribution, potable water and biogas plants. Lightweight, corrosion-proof, with a service life exceeding 50 years.

Types

  • PE 100 — high strength, for pressurised gas and water
  • PE 80 — gas distribution
  • PE 100 RC — crack resistant, direct burial without sand bedding

Joining methods

  • Butt fusion (mirror welding)
  • Electrofusion (couplers)
  • Mechanical joints (PE-to-metal transition)

Sizes: OD 20 to 630 mm. SDR: 11, 17, 17.6 depending on pressure rating.

Press-fit systems

Mechanical press joining: ultra-fast installation with no welding or threading. A fitting is pressed onto the pipe with a dedicated tool, creating a permanent sealed joint.

Materials

  • Stainless steel AISI 316L — most versatile
  • Galvanised carbon steel — economical, for HVAC
  • Copper — sanitary and gas installations

Advantages

  • 5–10x faster than welding
  • No hot work (safety, ATEX zones)
  • No welder certification required
  • Safety O-ring indicates unpressed joints

Sizes: 15 to 108 mm. Applications: sanitary, HVAC, chilled water, compressed air, medical gases.

Domande frequenti

What types of industrial pipes does Roffia supply?
Roffia supplies: carbon steel pipes (seamless and welded, EN 10216/10217, ASTM A106/A53), stainless steel pipes (AISI 304/316L, EN 10216-5, ASTM A312), polyethylene PE pipes for biogas and biomethane plants (PE 100, PE 80 — compliant with EN 1555 for gas and EN 12201 for water, ideal for digesters, upgrading and grid injection), press-fit pipes for quick installation without welding, and round bars in carbon and stainless steel for machining. Stock availability in Cremona with cut-to-size service.
What is the difference between seamless and welded pipe?
Seamless pipe is hot-rolled from a solid billet with no weld seam — it offers maximum pressure and temperature resistance and is mandatory for many PED and Oil & Gas applications. Welded pipe is made from rolled and welded plate — more economical and adequate for low-pressure and non-critical fluid services.
What are press-fit pipes?
Press-fit systems join pipes using mechanical pressing with special fittings, eliminating the need for welding or threading. Advantages: fast installation, no hot work (ideal for ATEX zones), consistent and repeatable joint quality. Available in carbon steel and stainless steel, 15–108 mm.
What round bars does Roffia stock?
Roffia stocks carbon steel round bars (C40, C45, 39NiCrMo3) and stainless steel (AISI 304, 316, 316L) for shafts, pins, supports and general machining. Diameters from 10 to 300 mm, standard lengths 3 m and 6 m with cut-to-size service. 3.1 material certificates available on request.
When should I choose polyethylene PE pipe over steel?
Polyethylene pipes are ideal when you need: total corrosion resistance (buried services, aggressive fluids), lightweight handling on site, flexibility to follow curved routes without fittings, and a service life exceeding 50 years. They are the standard for gas networks (EN 1555), water mains (EN 12201) and biogas/biomethane plants. They are not suitable for high temperatures (max 60°C) or high pressures.
EN European or ASTM American standard — which should I choose?
It depends on the project and applicable regulations. EN pipes (10216, 10217) are the standard in Europe and are required by the Pressure Equipment Directive PED 2014/68/EU. ASTM pipes (A106, A312, A53) prevail in Oil & Gas, refinery and American-engineered projects. Roffia stocks both at its Cremona warehouse and can provide 3.1 certificates for either standard.
Does Roffia offer cut-to-size service?
Yes, Roffia offers cut-to-size service for carbon steel pipes, stainless steel pipes and round bars directly from its Cremona warehouse. Cutting is available for both small quantities and full site deliveries. Lead times are short thanks to stock availability of the most requested sizes.

Looking for pipes or bars?

Tell us the material, standard, diameter, wall thickness and quantity. We check stock availability — cut to size and fast delivery throughout Italy.

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