What Penflex does

Penflex is a privately held US industrial manufacturer founded in 1902 and headquartered in Gilbertsville, Pennsylvania, operating as America's first metal hose manufacturer. The company produces corrugated metal hose (P3, P4, 700, 800, 900, 1400, P5, and 400 Series), interlocked hose (Conveyor, Exhaust, M-100 Pressure), specialty alloy hoses (Inconel 625, Monel 400, Hastelloy C-276, Bronze), metal bellows and expansion joints, and contract braiding services. Core technology centers on corrugated, interlocked, and braided flexible metal hose manufacturing, including butt welding, corrugation forming, braiding, and assembly with various end fittings, supported by ASME Section IX-certified welding and ISO 9001 / ISO 10380 quality systems.

The product portfolio spans engineered assemblies for demanding service environments: chlorine transfer hoses compliant with The Chlorine Institute Pamphlet 6, cryogenic hoses, data center liquid cooling hoses, helium transfer hoses for telescopes, molten sulfur and sulfuric acid assemblies, power generation assemblies for steam and gas turbines, steel mill assemblies, terminal dock hoses, turnaround hoses, and pump connectors, plus an ABS-certified EX Series of exhaust expansion joints. Specialty alloys (Inconel, Monel, Hastelloy, bronze) enable service up to 1800°F and corrosive media handling, and a CL3 Clean ID Hose variant eliminates post-manufacturing cleaning for high-purity applications. Manufacturing is performed at the Gilbertsville, PA facility, with a Houston, TX warehouse stocking pre-made assemblies for immediate shipment.

Penflex operates a B2B, sales-led, RFQ-based direct sales model in which sales engineers work with customers from prototype through delivery and a dedicated account manager serves as a single point of contact. Pricing is quote-based, determined by hose series, alloy, size, braid configuration, quantity, and end fitting requirements, with no publicly disclosed price list. The company serves at least ten verticals, including chemical and petrochemical, oil and gas, power generation, steel mills, cryogenics, semiconductor manufacturing, data centers, HVAC, terminals, and water systems. Distribution is direct from manufacturing, supplemented by the Houston pre-made assembly warehouse, and the firm supports customers globally through its own sales engineering and a content-rich technical portal including engineering bulletins, online calculators, configuration tools, and the courses.penflex.com training program.

Name

Penflex

Legal name

Penflex

Website

https://penflex.com

Company type

Private

Founded year

1902

Operating status

Operating

Headcount range

51–100 employees

Short description

Penflex is a privately held, 120-year-old US manufacturer of corrugated and interlocked metal hose, expansion joints, and specialty alloy (Inconel, Monel, Hastelloy, bronze) hose assemblies, serving chemical, petrochemical, oil and gas, power generation, semiconductor, data center, steel, cryogenic, and water infrastructure customers via RFQ-based direct sales from its Gilbertsville, PA facility and Houston, TX warehouse.

Ownership category

akta.pro rank

Product category

Industrial Metal Hose and Expansion Joints

NAICS

Rubber and Plastics Hoses and Belting Manufacturing (326220)

SIC

Gaskets, Packg & Sealg Devices & Rubber & Plastics Hose (3050)

akta.pro primary industry

Seals, Gaskets & Fluid Connectors (O-rings, packings, rotary seals, quick couplers) (IMAHAGAI)

akta.pro secondary industry

Expansion Joints, Flexible Connectors & Compensators (Rubber/Fabric) (IMANALAF)

Keywords

• Corrugated metal hose
• Flexible metal hose
• Expansion joints
• Metal bellows
• Industrial hose assemblies

Headquarters

HQ city

Gilbertsville

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Custom Metal Hose Products: Revenue from manufacture and sale of corrugated metal hose (P3, P4, 700, 800, 900, 1400 series), interlocked hose, hose assemblies, expansion joints, and braiding services. Products range from standard configurations to fully custom builds. Pricing via RFQ/quotes.
2. Hose Assemblies: Custom and pre-made hose assemblies including chlorine transfer hoses, cryogenic hoses, data center hoses, helium transfer hoses, power generation assemblies, pump connectors, and specialty industrial assemblies. ASME Section IX-qualified welding with leak testing.
3. Braiding Services: Contract braiding services for metal or customer-supplied non-metal hoses with metallic or synthetic wires. Braiding capacity without hose or liner in long continuous lengths.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels6 records

Core offering

Penflex manufactures corrugated and interlocked flexible metal hose, braided hose products, and stainless steel metal bellows and expansion joints for demanding industrial environments. Products are sold in standard configurations or built-to-order from customer-approved drawings, using multiple alloy families (austenitic stainless steels, Inconel, Monel, Hastelloy, bronze) and supported by in-house engineering, ASME Section IX-certified welding, NDT/leak testing, and contract braiding services. Pricing is quote-based and customers are served through an RFQ/sales engineer model from facilities in Gilbertsville, PA and Houston, TX.

Product overview

Penflex is an ISO 9001-certified manufacturer of precision-engineered metal hose, flexible hose assemblies, and expansion joints with over 120 years of operation. The product portfolio centers on corrugated metal hoses (including P3, P4, 700, 800, 900, and 1400 series), interlocked hoses (Conveyor, Exhaust, M-100), and specialty alloys (625 Inconel, 740 Monel, 776 Hastelloy, 794 Bronze). These core hose products are complemented by custom and pre-made hose assemblies for specific applications (Chlorine Transfer, Cryogenic, Data Center, Helium Transfer, Power Generation, Steel Mill, Terminal Dock, Turnaround), expansion joints (including Exhaust, Externally Pressurized, Power Generation, Safety Relief Valve Vent Connectors, Steel Mill), and braiding services. The company offers in-house engineering, fabrication, testing, and application knowledge to deliver custom solutions for critical industrial applications across chemical, cryogenic, power generation, semiconductor, and manufacturing environments.

Differentiator

Problem solved

Functional benefit

Products and services

• P3 Series Corrugated Metal Hose (including CL3 Clean ID variant) Lightweight flexible metal hose with innovative production process allowing longer lengths, uniformity of corrugations and consistent pitch; clean bright finish with high coverage braid for optimum working pressures. The CL3 Clean ID variant delivers a truly clean inside diameter without internal tooling or lubrication oil. For industrial buyers in chemical, cryogenic, data center, and general industrial applications.
• P4 Series Corrugated Metal Hose General purpose midweight flexible metal hose balancing flexibility and robustness; one of the most popular Penflex product lines, manufactured using an innovative production process. For general industrial buyers requiring balanced flexibility and durability.
• 700 Series Corrugated Metal Hose Original general purpose industrial metal hose manufactured from cylindrical tube formed from rolled strip joined by butt welding; long-serving product for traditional industrial sectors. For general industrial buyers across traditional sectors.
• AIS Series (American Iron & Steel Compliant Hose and Braid) Flexible metal hose and braid compliant with American Iron & Steel (AIS) requirements for projects requiring 100% domestically sourced raw materials. Manufactured at Gilbertsville, PA. For water/wastewater infrastructure buyers funded by Clean Water and Drinking Water State Revolving Fund programs.
• 800 Series Heavy-Duty Corrugated Metal Hose Heavy duty metal hose designed for higher pressure applications and longer resistance to chemical corrosion; manufactured from cylindrical heavy-walled tube formed from rolled strip. For chemical and industrial buyers needing higher pressure and corrosion resistance.
• 900 Series Heavy-Duty Corrugated Metal Hose Heavy duty metal hose designed for extreme pressure applications and longer resistance to chemical corrosion; annular hose construction with close pitch. For chemical, petrochemical, and industrial buyers with extreme pressure requirements.
• 1400 Series Heavy-Wall Stainless Steel Hose Heavy-wall stainless steel hose designed for extreme pressure applications with heavy-duty braid constructed to sustain the highest working pressures and provide maximum protection to the inner core. For industrial buyers with the highest pressure requirements.
• P5 Series Large Diameter Hose and Braid Large diameter hose and braid with inside diameters spanning 14 to 24 inches, used in low pressure applications where absorbing vibration is a primary concern. Typically used in power generation, steel, chemical, oil and gas, and HVAC industries.
• 625 Inconel Series Flexible Metal Hose Flexible metal hose made with Inconel 625 superalloy offering excellent corrosion resistance and high temperature properties up to 1,800°F; pitting resistance equivalent (PRE) more than double that of 316L stainless steel. For buyers in extreme temperature and corrosive environments.
• 740 Monel Series Flexible Metal Hose Flexible metal hose made with Monel 400 (nickel-copper alloy) demonstrating excellent corrosion resistance along with high strength and toughness; used in marine and chemical processing applications, particularly seawater and chlorine-rich environments.
• 776 Hastelloy Series Flexible Metal Hose Flexible metal hose made with Hastelloy C-276 superalloy high in nickel, chromium and molybdenum; superior corrosion resistance for aggressive media applications including chlorine transfer. For chemical and chlorine transfer buyers.
• 794 Bronze Series Flexible Metal Hose Flexible metal hose made with bronze alloy; most frequently used in seismic and water applications and in HVAC piping layouts to connect chillers and provide vibration elimination with copper tube ends.
• 400 Series Helical Hose Helical hose option available in sizes 1/4 to 1 inch ID; used when helical construction is preferred over annular for easier drainage of liquid media or higher working pressures in fully compressed configuration.
• M-100 Pressure Hose (Interlocked) Heavy duty fully interlocked metal hose designed for pressure containment in industrial fluid transfer applications; packing inserted into a specially formed groove serves as a continuous gasket for pressure-tight seal. For industrial fluid transfer buyers requiring pressure containment.
• Chlorine Transfer Hose Assemblies Specialized metal hose assemblies for transferring chlorine gas and liquid chlorine; fully comply with The Chlorine Institute Pamphlet 6, Appendix A. Available in Monel 400 or Hastelloy C-276. For chemical, chlor-alkali, and water treatment buyers.
• Cryogenic Hose Assemblies Flexible metal hose assemblies for cryogenic applications with annular hose design, thin wall construction, compressed pitch, and higher corrugation height for maximum flexibility at extreme low temperatures. For LNG, medical gas, and industrial cryogenic buyers.
• Data Center Hose Assemblies Metal hose assemblies for data center cooling applications with Clean ID technology, argon purge welding, and superior corrosion resistance for glycol and other refrigerants. For data center cooling system designers and operators.
• Helium Transfer Hose Assemblies Stainless steel hose assemblies specifically designed for helium transfer within large telescopes; highly flexible, requiring little force to bend and resisting deformation after repeated cycling, with helium mass spectrometer leak testing. For scientific/large telescope project buyers.
• Molten Sulfur & Sulfuric Acid Transfer Hose Assemblies Specialized hose assemblies for transporting molten sulfur and sulfuric acid, including steam jacketed options to maintain elevated temperatures for the molten state. For chemical and sulfuric acid production buyers.
• Paper Dryer Rotary Joint Hose Assemblies Metal hose assemblies attached to rotary joints on paper drying equipment; designed to flex, absorb vibration and operate at steam temperatures while providing corrosion resistance for longer service life. For pulp and paper industry buyers.
• Power Generation Hose Assemblies Hose and tube assemblies for steam and gas turbine systems with precision machine parts, heavy wall thicknesses, options for thermal barrier and ceramic coatings, and various NDE leak detection methods. For power generation buyers.
• Pre-Made Hose Assemblies Common hose assemblies built to stock and ready for immediate shipment from Houston, TX; feature heavy wall construction, double braid, and purged welds. All assemblies are leak tested, hydrotested, and tagged. For industrial buyers needing fast delivery.
• Pump Connectors Short assemblies designed to accommodate small amounts of lateral movement; available in flanged (2 to 12 inch) and threaded (1/4 to 4 inch) configurations with various end fitting options. For industrial pump system buyers.
• Steel Mill Hose Assemblies Metal hose assemblies designed for extremely hot environments in steel mills, including caster cutoff torch hoses, high temperature lubrication lines, oxygen lance hoses, and water cooling hoses. For steel mill operators.
• Terminal Dock Hose Assemblies Heavy-duty hose assemblies for transferring corrosive media at terminal and tank farm facilities; designed for durability and leak prevention with installation and maintenance guidelines provided. For petroleum, chemical, and bulk liquid terminal operators.
• Turnaround Hose Assemblies Common turnaround hose assembly configurations stocked in Houston, TX warehouse for immediate availability during refinery turnaround events; used as hydrocarbon drain lines and for steam injection and transfer applications. For oil refinery maintenance buyers.
• Expansion Joints & Raw Bellows Custom expansion joints accommodating movement and absorbing vibration in piping systems to protect adjacent piping and equipment; made to order per customer requirements with inventory of raw bellows available. For industrial piping system buyers.
• EX Series Exhaust Expansion Joints ABS-certified expansion joints that damp vibration and absorb thermal movements in exhaust applications; three-ply stainless steel and high nickel alloy components available in sizes 4 to 24 inches. For marine vessel exhaust and power generation buyers.
• Externally Pressurized Expansion Joints Expansion joints with design allowing large axial movements when space limitations are a concern; media flows through outside of bellows, removing pressure instability as a design limitation. For industrial piping buyers with space-constrained installations.
• Power Generation Expansion Joints Metal expansion joints designed for extreme operating conditions in gas turbine systems; accommodate thermal expansion and irregular movement from hot exhaust gases at high velocities. For power generation buyers.
• Safety Relief Valve Vent Connectors Expansion joints installed at safety relief valve outlets to absorb vibrations caused by escaping steam; available in M-100 style and metal bellows configurations in sizes 2 to 24 inches. For industrial and power generation safety system buyers.
• Steel Mill Expansion Joints Metal bellows and expansion joints for steel mills used in blast furnaces and other key equipment; designed for high temperature and corrosive environments. For steel mill operators.
• Contract Braiding Services Contract braiding services for metal and non-metal hoses using metallic or synthetic wires and threads; braiding capacity includes 24 to 96 carrier machines for various hose sizes, in continuous lengths up to several thousand feet. For industrial hose manufacturers and converters.
• Custom Hose Assembly Fabrication Custom metal hose assembly fabrication from customer-approved drawings; ASME Section IX-qualified welders build assemblies across the full range of hose sizes and alloys including exotic alloys for special applications. For industrial buyers with custom requirements.

Quantifiable outcome

• 99% customer retention rate
• +3 more outcomes

Segments10 records

Ideal customer profiles8 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Two partnerships are on record, tiered core.

• The Chlorine InstitutecoreStrategic or Co-development PartnerPenflex is a member of The Chlorine Institute. Chlorine transfer hoses fully comply with CI Pamphlet 6, Appendix A, which sets the standard for safe chlorine transfer including parameters for design, fabrication, installation and maintenance of hoses used in chlorine applications.
• Cryogenic Society of America (CSA)coreStrategic or Co-development PartnerPenflex is a member of CSA, a non-profit technical society serving all those interested in any phase of cryogenics. CSA membership supports Penflex's cryogenic hose manufacturing expertise and provides resources for the cryogenic industry.

Scale indicators7 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• BOA Group: German-based global manufacturer of metal bellows, expansion joints, and flexible metal hose serving automotive, industrial, and aerospace markets — competes directly with Penflex in industrial expansion joints and braided metal hose.
• Hyspan Precision Products: US-based manufacturer of metal expansion joints and braided metal hose for petrochemical, power, marine, and industrial markets — directly comparable in expansion joint and flexible metal hose product categories.
• Witzenmann: World's largest manufacturer of metallic flexible elements (metal hose, expansion joints, bellows) serving chemical, oil & gas, power, and automotive — direct competitor across Penflex's primary verticals including cryogenics and chemical transfer.
• Metraflex Company: US manufacturer of metal expansion joints, flexible hose, and pump connectors serving HVAC, mechanical contracting, and industrial piping — direct peer in expansion joints and pump connector products.
• Microflex Technologies: Manufacturer of flexible metal hose and bellows products for industrial applications — competes with Penflex in standard and custom metal hose assemblies for industrial fluid handling.
• Flexicraft Industries: US manufacturer of flexible metal hose, expansion joints, and braided products for industrial applications including chemical, oil & gas, HVAC, and power — closely comparable to Penflex's product offering and customer base.
• Senior Flexonics: A division of Senior plc that designs and manufactures flexible metal hose, expansion joints, and bellows for similar industrial markets including petrochemical, power generation, and aerospace — direct overlap with Penflex's core product portfolio.

Broad incumbents

• Kadant Inc. Global supplier of engineered components used in paper, packaging, and industrial process industries, including fluid handling products — overlaps with Penflex in paper dryer rotary joint hoses and industrial process applications.
• ITT Inc. Diversified manufacturer of highly engineered components including motion technologies, friction products, and connect-and-control platforms for industrial, aerospace, and energy markets — broader incumbent with overlapping capabilities in industrial fluid handling.
• Parker Hannifin (Motion Group / Fluid Connectors): Global diversified manufacturer of motion and control technologies including aerospace and industrial hose products — competes broadly with Penflex in industrial hose and fittings but operates at much greater scale across many other product lines.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/penflex_inc

Compliance7 records

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Penflex