Thorburn S91 — Type 316L SS Annular, Unbraided Inner Core

The Thorburn S91 — Type 316L SS Annular, Unbraided Inner Core is a annular corrugated metallic hose in the Stainless SS Corrugated family. Type 316L SS core (unbraided inner hose for bonnet and venting service). Working pressure to 13 bar, operating temperature -200°C to +650°C.

Construction

• Type: Stainless SS Corrugated — Type 316L unbraided annular inner core
• Construction: Annular Corrugated
• Core material: Type 316L SS
• Braid: Unbraided — N/A (Unbraided)
• End fitting material: 316L SS standard; Inconel, Hastelloy, or Monel available for matched-trim service
• Nominal ID range: DN 6 (1/4") to DN 350 (14")
• Bend radius (static): 25 mm minimum
• Bend radius (dynamic): 127 mm minimum
• Weight: ~0.13 kg/m (size-dependent)

Performance

Maximum working pressure 13 bar at the smallest bore (decreases with increasing diameter — refer to the OEM size table for per-size ratings). Minimum burst pressure 52 bar with safety factor 4:1 per ISO 10380. Operating temperature range -200°C to +650°C (continuous service; intermittent excursions evaluated on request). All assemblies hydrotested at 1.5× working pressure with a witness-test certificate available on request.

Applications

• Chloride-rich process lines
• Sea-water and brackish-water service
• Inner element of jacketed assemblies
• Pharma / FDA-compliant utility

Compliance

• ISO 10380:2012 PSL 2 (Corrugated Metal Hoses and Hose Assemblies)
• Pressure Equipment Directive 2014/68/EU Module H
• ASME B31.1, B31.3, Section IX
• NACE MR0175 / ISO 15156 (sour-service compliant trim and fittings)
• CSA B51, CGA-8.1-M86
• EN 10204 3.1 / 3.2 mill test reports on request

How to order

Confirm (a) line working pressure and process medium, (b) operating temperature range, (c) bore size and overall length, (d) end fitting type per side (NPT / BSPP / ANSI 150-1500# RF / DIN PN10-PN40 / sanitary tri-clamp / camlock / butt-weld / etc.), (e) braid configuration (unbraided / single / double / triple — drives pressure rating), (f) any required certifications (ISO 10380 PSL class, PED Module, ASME conformance, NACE MR0175, CGA / UL / Chlorine Institute). Indus quotes ex-Dubai for stock items and ex-OEM for build-to-order, with mill test reports and pressure-test certificates included.

Companion products

Pair with matched ANSI flange gaskets, hose clamps, and OEM end-fitting hardware. For high-vibration installations, also specify a Lock-Section or Armor-Flex external hose guard. For fire-rated runs, add a Fry-Sil Fire Jacket or Fire Tape covering. For high-cycle or premium-corrosion service, ask about the matched OEM expansion-joint variant of the same alloy and pressure class.