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Piped Natural Gas

VSPV > Piped Natural Gas

Piped Natural Gas

A PNG turnkey project involves the complete design, supply, installation, and commissioning of a natural gas system, delivering ready-to-operate infrastructure. The sequence typically follows the below major stages:

Components of Piped Natural Gas Turnkey Project

1. Unloading Pump
  • The process begins with an unloading pump which transfers liquefied natural gas (LNG) from the supply tanker to the onsite storage tank.
  • handles the safe and controlled transfer of gas from mobile transport to fixed storage tank.

2. Storage Tank

Types of Storage tank

Above Ground: tank installed above the ground level. 

  • The LNG storage tank acts as the primary reservoir for holding LNG
  • It is a double-walled, vacuum-insulated cryogenic vessel, designed for low-temperature storage with minimal boil-off losses.
  • The inner vessel (made of stainless steel) contains the LNG, while the outer carbon steel jacket provides structural support and vacuum insulation.

Different type of Insulation

  • Vacuum + Perlite insulation utilizes expanded perlite powder filled in the annular space of a cryogenic vessel under high vacuum, effectively minimizing heat transfer through conduction and convection
  • Vacuum + Multi-Layer Insulation (MLI) employs multiple layers of reflective foils or films separated by spacers within a high-vacuum environment to primarily suppress radiative heat transfer, delivering exceptional thermal performance

Key features include:

  • Level, pressure, and temperature transmitters for continuous monitoring.
  • Pressure Relief Valves (PRVs) for overpressure protection
  • Boil-off gas lines connected to Gas Genset for BOG Management

All our tanks are designed in accordance with EN-13458 or ASME Section VIII and SMPV (U) / PESO regulations.

3.  Medium Pressure Pump

Transfers the Liquid Natural Gas from the Storage Tank to Vaporizer

4. Medium Pressure Vaporizer

The Medium Pressure Vaporizer is used to convert liquefied natural gas (LNG) into gaseous natural gas at medium pressure for downstream pressure regulation and distribution in PNG systems.

  • LNG from the storage tank is directed to the atmospheric vaporizer, where it is converted into natural gas (methane) at ambient temperature
  • The vaporizer uses ambient air as the heat source, eliminating the need for external energy input and ensuring low operating costs.
  • As the LNG passes through aluminum finned SS tubes, it absorbs heat from the surrounding air, changing phase from liquid to gas.
  • Design Considerations:
  • Outlet pressure: typically 0-40 bar(g), depending on downstream requirements.
  • Outlet temperature: maintained above +10°C to prevent condensation in the pipeline
  • Material: aluminum alloy, suitable for cryogenic and atmospheric exposure.
  • Redundant vaporizers are often installed to ensure continuous operation and allow maintenance flexibility.

5.  Pressure Regulating SKID

  • After vaporization, the medium-pressure natural gas flows to the Pressure Regulating Skid (PRS).
  • The PRS ensures that the LNG is delivered to the downstream system at a stable and controlled pressure, typically ranging between 8–12 bar(g) (or as required by end users).
  • The skid is equipped with
  • Pressure control valves and slam-shut valves for safety.
  • Pressure transmitters, temperature sensors, and flow meters integrated with a PLC-based control system.
  • Safety relief valves to protect the system from overpressure
  • The PRS ensures smooth, automatic regulation even under fluctuating inlet conditions

6. Secondary Pipeline

  • The secondary pipeline distributes PNG (Piped Natural Gas) to various consumers
  • The pipeline is constructed from carbon steels.

Automation and Control

  • The entire installation complies with SMPV, PESO, and ASME codes, ensuring safe handling of cryogenic fluids and high-pressure gases.
  • Gas leak detectors flame detectors, and temperature alarms are positioned at strategic points.
  • Firefighting systems including hydrants, foam monitors, and portable extinguishers are installed in accordance with NFPA guidelines.
  • Adequate venting systems and earthing arrangements, are provided to prevent overpressure or static discharge.

The PNG Turnkey System provides a reliable, automated, and safe solution for uninterrupted supply of usable natural gas for various industrial applications.
Through a seamless process involving unloading, storage, vaporization, pressure regulation, and distribution, the system ensures:

  • Continuous and stable gas supply,
  • Minimal energy consumption,
  • High operational safety
  • Compliance with global standards.

We also design fire detection system, fire suppression system and gas detection system. 

VSPV provides an end-to-end solution from design & manufacturing of tanks, civil work at site, erection & commissioning, to supporting for approvals & licensing from the Govt. of India statutory agency PESO.

  • The system is designed as per ASME B31.3 / B31.8 pipeline standards to ensure safety, integrity, and reliability of supply.
  • Gas from this network can feed industrial furnaces, boilers, power generators, or city gas grids, depending on application.

1-year warranty on manufacturing defects

VSPV stands behind our products throughout their service life:

Contact VSPV today for detailed specifications and customization options to meet your storage requirements.

Questions? You’re covered

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Main Features
01

Robust Design

Manufactured with corrosion resistant stainless-steel (SS) plate, stainless steel (SS) seamless pipe, high quality valves, gauges and instruments.
02

SS Seamless Pipes and Tubes

VSPV uses only corrosion resistant stainless-steel pipes and tubes for inner tank piping and external piping to have a better aesthetics, long corrosion free, leak free and maintenance free life.
03

Oxygen Compatible Cleaning

Stainless steel inner tank, internal pipes, external pipes, and fittings are cleaned through a series of processes like pickling, passivation and degreasing followed by stringent quality checks with a ultraviolet (UV) lamp, which ensures superior clean environment for Oxygen storage.
04

Testing

Tanks undergo through a series of Non-Destructive Examinations (NDE) including helium leak test to ensure robustness, long vacuum retention, leak proof and maintenance free life.
05

Vacuum Guarantee

Stringent helium leak test, followed by Vacuuming with latest good quality vacuum pumps provides a long vacuum retention period.
06

Quality Components

VSPV uses very quality time-tested cryogenic valves, safety relief valves, regulator, Thermal Relief Valves, 3-way Divertor valve, Level & Pressure gauge.
07

Painting & Aesthetics

Steel grit blasting to SA 2 ½ followed by a 3-coat painting process Provides resistance to corrosion, oxidation, and better aesthetics for long-term.
08

Flexibility

Customer can choose between perlite & super insulation or 4-Leg & 3-Leg design
09

PESO Approval & Site Work

VSPV is well equipped for site civil foundation work, erection & commissioning, and support for PESO approval & licensing

We are always ready to help you and answer your questions

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