NMX‑LOXS‑600 / Rev 00 / Cryogenic · ASME VIII · EN 13458 / Noida · India 2026 · Product Page

NMX-LOXS-600 · UNDER CONTRACT — ROCKET-PROPULSION CRYOGENIC STORAGE

Liquid oxygen, held at −196 °C. Ready for the test stand.

Name: Liquid Oxygen Storage Tank & Dewar — Aerospace Cryogenic Storage
Brand: Neometrix

An aerospace-grade cryogenic storage and supply system for a rocket-propulsion test centre: a 600-litre vacuum-and-perlite super-insulated LOX/LN₂ tank rated to 50 bar, a 250-litre cryogenic dewar, and super-insulated transfer hoses. Self-pressurising, austenitic-stainless throughout, with twin burst discs and twin relief valves, a vacuum interspace held to a 10⁻⁸ jacket leak rate, and helium mass-spectrometer leak testing — engineered to ASME Section VIII, EN 13458 and the SMPV Rules with PESO approval. Under contract for an Indian rocket-propulsion establishment.

Enquire — cryogenic storage Capability sheet (PDF)

Fig · 01 The 600 L cryogenic storage tank — representative render at a propulsion test facility

Storage Tank

600litres · LOX/LN₂

Dewar

250litres · super-insulated

Pressure

50bar · design

Temperature

−196°C · cryogenic

Insulation

Vacuum+ perlite · ASME VIII

ISO 9001 / 14001 Under contract — rocket propulsion ASME Sec VIII Div 1 · EN 13458 SMPV(U) · PESO Noida · India

Overview

A rocket engine runs on oxygen. The test stand needs it cold, pure and ready.

Liquid-propulsion testing depends on a steady, safe supply of cryogenic oxygen and nitrogen. Storing a fluid that boils at −183 °C, expands 860-fold on warming and violently accelerates combustion is an engineering problem in its own right — and doing it to aerospace purity and reliability is the whole point of this system.

Representative render — a compact vertical cryogenic dewar with a frosted valve head and pressure gauge, connected by a braided stainless-steel super-insulated flexible transfer hose with frost on the cold couplings

Fig · 02 The 250 L dewar and super-insulated transfer hose (representative render)

The system is three matched parts. The 600-litre storage tank is a vertical, double-walled vessel with a vacuum- and-perlite interspace that holds the cold in; it stores LOX or LN₂ at up to 50 bar and drives its own supply through a self-pressurising heat-exchanger coil — no pump in the cold circuit. The 250-litre dewar takes cryogen to where a tank cannot go, and the super-insulated braided hoses move liquid between them with minimal boil-off.

Everything wetted is austenitic SA-240 Gr 304 stainless, oxygen-clean and rated for cryogenic dynamic loads. The safety case is built for a fluid that must never be trapped: two burst discs and two relief valves for redundancy, a vacuum interspace proven to a 10⁻⁸ leak rate by helium mass-spectrometer, and welds radiographed or ultrasonically inspected. It is engineered to ASME Section VIII Div 1, EN 13458 and the SMPV Rules, and PESO-approved for pressurised cryogenic service.

Cold, clean, and always able to vent — the three rules of liquid oxygen. The engineering here keeps all three, at aerospace grade.

Under Contract · Rocket Propulsion

Engineered to the requirement

Designed to an Indian rocket-propulsion establishment’s qualitative requirements for cryogenic LOX/LN₂ storage and supply to test stands; the design is approved and the system is built to order, with the full certification and test-document set in scope.

Certified · Pressure Vessel

Aerospace-grade paperwork

ASME Section VIII Div 1, EN 13458 and SMPV(U) with PESO approval; material, radiographic/ultrasonic weld, dimension, proof-pressure, helium mass-spectrometer leak and gauge-calibration certificates supplied with the system.

Self-Sufficient · Safe

It pressurises and protects itself

A pressure-building coil raises head pressure to move liquid without a cold pump; a GN₂ port allows external pressurisation when needed; and twin burst discs and relief valves make certain that a cryogen which expands on warming can never be locked in.

Architecture

From the tanker to the test stand, without a warm moment.

The schematic below is the whole cryogenic path — fill, storage, self-pressurisation, safety train, and supply to the dewar and the test stand.

FIG · 03CRYOGENIC STORAGE & SUPPLY SCHEMATIC · VACUUM-INSULATED TANK · SAFETY TRAIN

Fig · 03 One cold path — vacuum-insulated tank with self-pressurising coil, redundant burst-disc and relief-valve safety, dewar and test-stand supply

Arc · 01

The Vacuum-Insulated Tank

A 600 L vertical vessel: an SA-240 Gr 304 inner shell inside a stainless jacket, with a vacuum-and-perlite interspace evacuated and proven to a 10⁻⁸ jacket leak rate. Rated to 50 bar with fill (top and bottom), withdrawal, vent and overflow lines, pressure, dual-scale level and vacuum gauges, and a welded base frame with crane hooks and forklift entry — cold-stretched and impact-tested at −196 °C per EN 13458.

Arc · 02

Self-Pressurisation

A pressure-building coil draws liquid from the base, warms it through an ambient heat exchanger so it boils, and returns gas to the top — raising head pressure to push liquid out with no moving part in the cold circuit. A regulator sets tank pressure, and a ½″ GN₂ port allows external pressurisation for rapid transfer when a programme demands it.

Arc · 03

The Safety Train

Liquid oxygen expands roughly 860 times on boiling, so no volume can ever be isolated. Two burst discs and two safety relief valves protect the vessel with full redundancy, thermal relief valves guard trapped line sections, and cryo-compatible manual valves rated for high dynamic pressure control every flow — all sized and certified to ASME.

Arc · 04

Dewar & Supply

Liquid is withdrawn to a 250 L super-insulated dewar and to test-stand supply through braided stainless super-insulated hoses (1.5″, 50 bar, flexible to a 0.5 m radius, 310 K to 70 K). Every wetted part is austenitic stainless or a certified LOX-compatible material, degreased and oxygen-cleaned so nothing in the path can react with the oxidiser.

Holding a cryogenic LOX/LN₂ storage, dewar or propulsion-supply requirement? Send it across — clause-by-clause compliance matrix within two working days · [email protected]

Send tender spec

Specifications

Reference specification, as contracted.

The parameters below reflect the system under contract for an Indian rocket-propulsion establishment. Capacity, pressure rating and fittings are re-scoped against your specification.

General arrangement drawing — 600 litre vertical cryogenic liquid-oxygen storage tank: inner and outer vessel with dished ends, perlite insulation, nozzle schedule and a piping and instrumentation diagram with safety valves, burst discs, gauges and pressure-building coil

Fig · 04 General arrangement & P&ID — the 600 L cryogenic tank, dished-end vessel and safety fittings

Vessel, insulation & safety

The tank is a vertical double-walled vessel with dished ends, the inner shell suspended inside a stainless jacket and the interspace filled with perlite and evacuated to a hard vacuum. The self-pressurising coil, gauges, and the burst-disc and relief-valve manifold are grouped for single-side operation and maintenance.

Every component in contact with liquid oxygen — vessel, pipework, valves, flanges and hoses — is austenitic stainless steel or a certified LOX-compatible material, degreased and oxygen-cleaned so nothing in the path can react with the oxidiser it holds.

Full specification — expand

System	Aerospace-grade cryogenic LOX/LN₂ storage & supply · 600 L vacuum-insulated storage tank + 250 L dewar + super-insulated transfer hoses · design, manufacture, supply, installation, testing & commissioning
Storage Tank	600 L LOX/LN₂ · vertical, double-walled, dished ends · vacuum + perlite super-insulation · inner & jacket SA-240 Gr 304 / SS304L · ~2.3 m tall · empty ~700 kg
Pressure / Temp	Storage/design pressure 50 bar · proof-pressure (hydro) tested · operating −196 °C to +40/55 °C · cold-stretched, inner impact-tested at −196 °C
Vacuum	Jacket vacuum interspace leak rate ≤10⁻⁸ L/s · vacuum gauge & vacuum port for pump-down · inner-vessel leak rate nil
Self-Pressurisation	Heat-exchanger pressure-building coil + pressure regulator (with economiser / filter / NRV) · ½″ flanged GN₂ external-pressurisation port
Lines & Instruments	SS fill (top & bottom), withdrawal/drain, vent, overflow — all flanged, rated 50 bar · pressure gauge · dual-scale (LOX + LN₂) level gauge with volume chart · vacuum gauge
Safety	2× burst discs + 2× safety relief valves (ASME redundancy) · thermal relief valves · full try cock · cryo-compatible manual valves & seats for high dynamic pressure
Dewar	250 L super-insulated cryogenic LN₂ dewar · matched cryogenic valve head & gauges
Transfer Hose	Cryo flexible, 1.5″ · MWP 50 bar · 310 K to 70 K · braided SS304L outer · 3.5 m, flexible to <0.5 m radius · cryogenic flanged end connections
Mounting	Welded rectangular base frame · concrete-fixing provision · crane-lifting hooks · forklift-entry channels
Codes & Tests	ASME Sec VIII Div 1 · EN 13458 · SMPV(U) Rules · PESO · certificates: material, radiographic/ultrasonic weld, dimension, proof-pressure, MSHLD helium leak, gauge calibration, valve data sheets
Status	Under contract — design approved, built to order for an Indian rocket-propulsion establishment · configurable to customer specification

PDF · 1 page

LOX Storage Tank & Dewar — Capability Sheet

Tender Response

Send your specification — compliance matrix in two working days

Variants

One cryogenic discipline, many capacities and fluids.

Requirements call this a LOX storage tank, a cryogenic vessel, a vacuum-insulated dewar or a propulsion cryo-supply skid. The engineering scales to all of them.

Var · 01

The Contracted System

The 600 L tank + 250 L dewar + transfer hoses on this page, rated to 50 bar — as engineered for an Indian rocket-propulsion establishment’s test-stand supply.

Var · 02

Other Capacities & Pressures

Larger bulk storage tanks, higher design pressures for run-tank duty, and smaller portable dewars — the vacuum-insulation, self-pressurisation and safety architecture scale with the volume and the pressure.

Var · 03

Other Cryogenic Fluids

Liquid nitrogen, liquid argon and other cryogens on the same double-walled, vacuum-insulated platform — each with its own material, cleaning and safety case engineered to the fluid.

Var · 04

The Wider Gas & Cryo Line

Mobile LOX tanker vehicles, static LOX dispensers, liquid-nitrogen dewars and nitrogen/oxygen generation — one supplier across the cryogenic and gas chain, from production to point of use.

Applications

Where it serves.

Wherever cryogenic oxygen has to be stored to aerospace grade.

A · 01Rocket-engine test stands — cryogenic LOX/LN₂ supply for propulsion testing

A · 02Launch-vehicle & engine qualification programmes — run-tank and storage duty

A · 03Space & propulsion research centres — cryogenic fluid storage and handling

A · 04Aerospace & defence test facilities — high-purity oxygen and nitrogen supply

A · 05Industrial & research cryogenics — LOX/LN₂ storage, dispensing and transfer

A · 06Export space & propulsion programmes — subject to Government of India authorisation

FAQ

Common questions.

Plain-language answers from the engineering team.

Q · 01 Why store propulsion oxygen as a liquid rather than a gas?

Density and delivery. One litre of liquid oxygen becomes roughly 860 litres of gas, so a rocket test stand can hold and feed the oxygen it needs from a vessel a fraction of the size and weight of high-pressure gas cylinders — and it can be delivered to the engine at the flow rates propulsion testing demands. The price of that density is temperature: LOX lives at around −183 °C, which is why the whole system is built around vacuum insulation and controlled boil-off rather than ordinary tankage.

Q · 02 How does the tank push liquid out without a pump?

Self-pressurisation. A pressure-building coil takes a little liquid from the bottom of the tank, warms it through an ambient-air heat exchanger until it boils, and returns the gas to the top — raising the head pressure until it gently pushes liquid out of the withdrawal line. A regulator holds the tank at the set pressure. It is elegant because there is no moving part in the cold circuit to fail; and for a fast transfer, a GN₂ port lets the tank be pressurised externally with dry gaseous nitrogen.

Q · 03 What is the vacuum-and-perlite insulation, and why the 10⁻⁸ leak rate?

The tank is two vessels, one inside the other, with the gap filled with perlite powder and then pumped down to a hard vacuum. Vacuum kills convection and conduction; the perlite blocks radiation. That combination is what lets a vessel hold cryogen for long periods with acceptable boil-off. The 10⁻⁸ jacket leak rate — verified by helium mass-spectrometer — is the guarantee that the vacuum will stay hard in service; a leaking jacket slowly loses its vacuum, and with it the insulation, so the leak test is really an insulation-life test.

Q · 04 Why two burst discs and two relief valves?

Because a cryogenic vessel must never be left with no way to relieve pressure. Any heat leak boils the liquid and the pressure climbs, so the relief path is the most safety-critical part of the design. Doubling the relief valves and the burst discs means one of each is always protecting the tank while the other can be inspected or replaced — and if a relief valve ever fails to open, its burst disc is the independent last resort. It is the same no-single-failure logic used on any serious pressure system, applied to a fluid that punishes mistakes.

Q · 05 What certification does the system carry?

The pressure vessels are designed to ASME Section VIII Div 1 and EN 13458 (the European cryogenic-vessel standard), under the Static and Mobile Pressure Vessels (Unfired) Rules with approval from the Chief Controller of Explosives (PESO). The system is supplied with the full evidence pack: material test certificates, radiographic or ultrasonic weld inspection, dimensional inspection, proof-pressure test, a helium mass-spectrometer (MSHLD) leak-test certificate for both vessel and jacket, and calibration certificates for every gauge — the documentation that lets a customer put a cryogenic vessel legally and safely into service.

Q · 06 Can you build to our specification — and export it?

Yes — this system is itself a build-to-specification contract, engineered to a customer’s qualitative requirements for capacity, pressure, fluids, fittings and certification regime. Send your requirement — storage and dewar volumes, design pressure, cryogenic fluids, supply interfaces, and the pressure-vessel code and inspection regime you work to — and a compliance matrix returns within two working days. Export engagements are managed end-to-end, subject to Government of India authorisation.

↗

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Browse all Neometrix product lines.

Get a quotation

Send your cryogenic
storage specification.

The Projects desk replies within two working days with a clause-by-clause compliance matrix and a budgetary quotation. Write to [email protected] or use the form.

Enquire — cryogenic systems Capability sheet (PDF) +91 7777 876 876

ISO 9001 / 14001 UNDER CONTRACT — ROCKET-PROPULSION CRYOGENICS ASME VIII · EN 13458 · SMPV(U) · PESO MADE IN NOIDA · INDIA

Liquid oxygen, held at −196 °C. Ready for the test stand.

A rocket engine runs on oxygen. The test stand needs it cold, pure and ready.

Engineered to the requirement

Aerospace-grade paperwork

It pressurises and protects itself

From the tanker to the test stand, without a warm moment.

The Vacuum-Insulated Tank

Self-Pressurisation

The Safety Train

Dewar & Supply

Reference specification, as contracted.

Vessel, insulation & safety

One cryogenic discipline, many capacities and fluids.

The Contracted System

Other Capacities & Pressures

Other Cryogenic Fluids

The Wider Gas & Cryo Line

Where it serves.

Common questions.

Gas & cryogenic systems from Neometrix.

Liquid Oxygen Tanker Vehicle & Dispenser

Liquid Oxygen Dispenser 800 L & Trolley

Portable Liquid Nitrogen Container / Dewar

Send your cryogenic
storage specification.

Similar Products

Share This Page

Liquid oxygen, held at −196 °C. Ready for the test stand.

A rocket engine runs on oxygen. The test stand needs it cold, pure and ready.

Engineered to the requirement

Aerospace-grade paperwork

It pressurises and protects itself

From the tanker to the test stand, without a warm moment.

The Vacuum-Insulated Tank

Self-Pressurisation

The Safety Train

Dewar & Supply

Reference specification, as contracted.

Vessel, insulation & safety

One cryogenic discipline, many capacities and fluids.

The Contracted System

Other Capacities & Pressures

Other Cryogenic Fluids

The Wider Gas & Cryo Line

Where it serves.

Common questions.

Gas & cryogenic systems from Neometrix.

Liquid Oxygen Tanker Vehicle & Dispenser

Liquid Oxygen Dispenser 800 L & Trolley

Portable Liquid Nitrogen Container / Dewar

Send your cryogenicstorage specification.

Similar Products

Share This Page

Send your cryogenic
storage specification.