Hose For High-Pressure Gases –

All-Metallic Gas Pigtails

Often known as specialty gas hose, all-metallic gas pigtails are flexible hoses with all-metallic components for use in specialty gas applications or any applications where high-purity or zero-effusion is important, such as helium and hydrogen applications. As opposed to PTFE hose pigtails, all-metallic pigtails are a welded product that will contain even the smallest molecule gases. The construction of specialty gas hose starts with a corrugated stainless steel or Monel core covered by braided layers of stainless steel for high pressure resistance. Stainless steel or Monel end fittings are welded on and an exterior anti-whip, anti-kink stainless steel armor casing can be added. Tethering is also an option. When zero-effusion is imperative, optional mass spectrometer helium leak testing using customer specifications can be performed.

Each assembly is pressure tested to 150% of the rated working pressure using nitrogen under water. Optional mass spectrometer helium leak testing using customer specifications can also be performed. All assemblies are cleaned, capped, and packaged in clear bags in accordance with CGA G-4.1. CGA nuts and nipples, check valve nipples, and hand-tights can be installed also. Check our our CGA Nuts & Nipples web page for more details. Fittings are male or female NPT, but stainless steel compression tube ends or face seal ends can be permanently welded to the assembly. All-metallic assemblies are permanently marked with manufacturer, pressure rating, and date of manufacture, meeting CGA requirements.

Unisource is a member of the Compressed Gas Association (CGA), the leading organization for the development of safety standards in the gas industry.

* Note: Due to the damaging effects of high velocity gases on the corrugated inner-core, metallic core hose in not recommended for cylinder filling applications.

specialty gas pigtail
High-Pressure Stainless Steel pigtails

Style UFHP22 3850 PSIG Stainless Steel Core Pigtails – Specialty Gas Hose

Stainless Steel Pigtail

Ultraflex HP pigtails are constructed with a helical close-corrugation 316 stainless steel core, ensuring high-purity, zero effusion, and excellent flexibility. Two stainless steel braids provide extremely high working pressure—3850 PSI MAWP with a 4:1 safety factor. Welded end connections are constructed using 316 stainless steel. Optional stainless steel armor is flexible and streamline, enhancing kink resistance, braid protection, and anti-whip protection. Each UFHP22 assembly is permanently marked with manufacturer, pressure rating, and date of manufacture– meeting CGA requirements, providing easy identification, and promoting safety. Sometimes know as “specialty gas hose”, these pigtails are ideal for small molecule gases due to their zero-effusion construction.

molecule gases such as helium and hydrogen that may effuse through the walls of other types of pigtails. The inherent properties of 316 stainless steel also are ideal for specialty gas applications. Consider UFHP22 for permanent on-site installations in connection to distribution and switch-over manifolds*. Each pigtail assembly is pressure tested at 150% of the rated working pressure using nitrogen under water. Optional testing can include mass spectrometer helium leak tests using customer specifications.

End fitting options are male NPT, female NPT, compression tube, or face seal (male or female). Assemblies can be cleaned for oxygen service to meet CGA specification G-4.1. Cleaned pigtails will be capped and packaged in clear bags with “oxygen clean” certification cards. CGA nuts, nipples, check-valve nipples, hand-tight nuts, elbows, or distance pieces may be specified to be installed on the assemblies.

* Note: Due to the damaging effects of high velocity gases on the corrugated innercore, metallic core hose in not recommended for cylinder filling applications.

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UFHP Pigtails Product Bulletin

Hose
End Fittings
Temperature
Pressure Range
Sizes
Braid
Compressed corrugation 316 stainless steel Male or female 1/4″ NPT, compression tube end, or face seal. Fitting material is 316 stainless steel Cryogenic to +1500°F 3850 PSIG MAWP 1/4″ Two braids of 300 series stainless steel

Style SF4500 4500 PSIG Stainless Steel Core Pigtails – Specialty Gas Hose

specialty gas hose

For extreme pressure service when a metallic pigtail is required. Style SF4500 all-stainless steel, all-welded hoses are a zero permeation product, ideal for specialty/high purity gases. the 4500 PSIG rating is the highest in the industry for metal hose pigtails. Optional stainless steel armor casing provides additional life, safety, and protection. Each assembly is tested to 1-1/2 times MAWP. Branded with part number, manufacturer, size, MAWP, and month/year.

Sometimes called a specialty gas hose, these pigtails are ideal for small molecule gases such as helium and hydrogen that may effuse through the walls of other types of pigtails.

The inherent properties of 316 stainless steel also are ideal for specialty gas applications. Consider SF4500 for permanent on-site in connection to distribution and switch-over manifolds*. Each pigtail assembly is pressure tested at 150% of the rated working pressure using nitrogen under water. Optional testing can include mass spectrometer helium leak tests using customer specifications.

End fitting options are male NPT, female NPT, compression tube, or face seal (male or female). Assemblies can be cleaned for oxygen service to meet CGA specification G-4.1. Cleaned pigtails will be capped and packaged in clear bags with “oxygen clean” certification cards. CGA nuts, nipples, check-valve nipples, hand-tight nuts, elbows, or distance pieces may be specified to be installed on the assemblies.

* Note: Due to the damaging effects of high velocity gases on the corrugated innercore, metallic core hose in not recommended for cylinder filling applications

All-Metallic-Gas-Pigtails-Page

SF4500 Pigtails Product Bulletin

Hose
End Fittings
Temperature
Pressure Range
Sizes
Braid
Compressed corrugation 316 stainless steel Male or female 1/4″ NPT, compression tube end, or face seal. Fitting material is 316 stainless steel Cryogenic to +1500°F 4500 PSIG MAWP 1/4″ Two braids of 300 series stainless steel

Style SF82 3000 PSIG Monel Core Pigtails

Monel pigtail

Style SF82 is an extremely flexible and durable Monel Hybrid, all-metallic, all welded construction that provides a “zero permeation” pigtail. This pigtail features an all welded corrugated Monel inner core with Monel end fittings for applications ranging from oxygen service to corrosive gas service. Two stainless steel braids are used instead of Monel braids to provide high working pressure–3000 PSI MAWP with a 4:1 safety factor.

The optional flexible stainless steel armor is flexible and streamline, enhancing kink resistance, braid protection, and ani-whip protection. Each hose is branded with the pressure rating and date of manufacture.

Choose either male or female 1/4″ NPT Monel ends.

Assemblies can be cleaned for oxygen service to meet CGA specification G-4.1. Cleaned pigtails will be capped and packaged in clear bags with “oxygen clean” certification cards. CGA nuts, nipples, check-valve nipples, hand-tight nuts, elbows, or distance pieces may be specified to be installed on the assemblies.

* Note: Due to the damaging effects of high velocity gases on the corrugated innercore, metallic core hose in not recommended for cylinder filling applications

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SF82 Monel Pigtails Product Bulletin

Hose
End Fittings
Temperature Range
Pressure Range
Sizes
Braid
Monel, helically corrugated inner core. Heavy wall Male or female Monel 1/4″ NPT -300 Deg. F. to 800 Deg. F. 3000 PSIG MAWP 1/4″ Two braids of 304 series stainless steel