Quick answer
A chemical injection package for oil and gas is a skid-mounted system that stores, meters and injects a process chemical into a pipeline or wellhead at a controlled rate to prevent corrosion, scale, hydrate formation or bacterial growth. Key types include corrosion inhibitor packages, scale inhibitor packages, methanol injection packages for hydrate prevention, biocide packages and oxygen scavenger systems. Each package includes a chemical storage tank, a high-pressure injection pump (plunger or hydraulic diaphragm), an injection quill, pressure and flow instrumentation and a control panel. For sour service (H2S-containing streams), all materials must comply with NACE MR0175. Pumps are selected to API 675 standard. Premix Technologies manufactures chemical injection packages for upstream oil and gas, midstream pipelines and refinery utility service in India, exporting to UAE, Saudi Arabia, Qatar and Oman.
What is a Chemical Injection Package?
A chemical injection package (also called a chemical injection skid or CIP) is a fully assembled, skid-mounted system that stores, meters and injects a specific chemical into an oil and gas pipeline, wellhead, process vessel or utility system at a controlled rate. Chemical injection is fundamental to oil and gas production and processing — it prevents corrosion, scale, hydrate blockage, bacterial growth and flow assurance problems that would otherwise cause pipeline failures, production shutdowns and costly remediation.
Premix Technologies manufactures chemical injection packages for upstream oil and gas (wellhead and production pipelines), midstream (gas processing and export pipelines) and refinery utility applications from our facility in Ahmedabad, India. Our packages are supplied to EPC contractors, oil companies and project consultants across India, the Middle East and export markets.
Types of Chemical Injection Packages
Corrosion Inhibitor Injection Package
Corrosion inhibitors protect pipeline internal surfaces from electrochemical corrosion caused by CO2, H2S, water and oxygen. The corrosion inhibitor injection package meters the inhibitor into the pipeline at a continuous or batch dose rate based on the pipeline fluid composition, water cut and flow conditions. Typical dose rates are 10–100 ppm. The package includes a storage tank, injection pump (plunger or hydraulic diaphragm), injection quill, pressure gauges and level instrumentation.
For sour service (H2S-containing streams), the package and all wetted components must be designed to NACE MR0175/ISO 15156 standards. View Premix corrosion inhibitor injection packages.
Scale Inhibitor Injection Package
Scale inhibitors prevent the deposition of calcium carbonate, calcium sulphate, barium sulphate and strontium sulphate scale inside pipelines, heat exchangers and wellbore tubulars. Scale deposition significantly reduces flow capacity and causes costly interventions. The scale inhibitor package operates continuously at very low dose rates (typically 5–50 ppm) with precise flow control. High accuracy hydraulic diaphragm pumps are used for very low flow, high pressure scale inhibitor injection.
Methanol Injection Package
Methanol is injected into gas pipelines and wellheads to prevent hydrate formation — a dangerous blockage caused when water vapour and gas combine at high pressure and low temperature. Methanol injection is critical in offshore pipelines, gas export pipelines and cold climate operations. Methanol packages handle large volumes (compared to other chemical injection systems) at high injection pressures. View Premix methanol injection packages.
Biocide Injection Package
Biocides kill sulphate-reducing bacteria (SRB) and other microorganisms that cause microbiologically influenced corrosion (MIC) and reservoir souring. Biocide injection is typically intermittent — a high concentration slug dose injected periodically (weekly or monthly) rather than continuous low-dose injection. The biocide package includes a large storage tank, high-pressure injection pump with batch control, and safety features for handling toxic biocide chemicals.
Oxygen Scavenger Injection Package
Dissolved oxygen in injection water, produced water and utility water causes rapid pipeline corrosion. Oxygen scavengers (typically sodium bisulphite or DEHA) chemically react with dissolved oxygen to neutralise it before it reaches vulnerable equipment. View Premix oxygen scavenger packages.
Hydrate Inhibitor Injection Package (MEG/TEG)
Monoethylene glycol (MEG) and triethylene glycol (TEG) are thermodynamic hydrate inhibitors used in deep water and high pressure gas pipelines where methanol would require impractically large volumes. MEG injection packages handle large flow rates of a viscous glycol solution and must be designed for continuous operation in remote or subsea-adjacent environments.
Key Components of a Chemical Injection Package
- Chemical storage tank: Day tank or bulk storage tank in SS316L, HDPE or FRP depending on the chemical. Bunded for secondary containment where required.
- Injection pump: Plunger pump or hydraulic diaphragm pump sized for the required flow rate and injection pressure. High-pressure service (100–700 bar) uses plunger pumps. Premix supplies both types.
- Injection quill: Delivers chemical to the pipe centreline. Fixed or retractable design depending on operating pressure and maintenance requirements. View Premix injection quills.
- Pressure and flow instrumentation: Pressure gauges, pressure transmitters, flow meters (rotameter or Coriolis), low-level switches and high-pressure shutdown.
- Control panel: From simple local panels with stroke counters to full PLC/SCADA integration with 4-20 mA signals, remote start/stop and alarm outputs.
- Skid frame: Structural steel skid with all components assembled, piped and wired for single-lift installation. Skid is pressure-tested before delivery.
Design Standards for Chemical Injection Packages
Chemical injection packages for oil and gas service must comply with applicable international standards:
- API 675: Standard for controlled-volume metering pumps used in the petroleum, chemical and gas industries
- NACE MR0175 / ISO 15156: Materials for equipment in H2S-containing environments
- ATEX / IECEx: Electrical equipment for use in explosive atmospheres (required for hazardous area installations)
- PED (Pressure Equipment Directive): For export to EU and European project specifications
- ISO 9001:2015: Quality management system — Premix Technologies is ISO 9001:2015 certified
Premix Technologies Chemical Injection Packages
Premix Technologies designs and manufactures chemical injection packages for corrosion inhibitor, scale inhibitor, methanol, biocide, oxygen scavenger and hydrate inhibitor service. Our packages are supplied with complete engineering documentation including GA drawing, P&ID, datasheet, test certificates and operation manual.
We supply to oil and gas projects in India (ONGC, Reliance, Indian Oil) and export to the Middle East (UAE, Saudi Arabia, Qatar, Oman), Africa and Southeast Asia. Contact us at sales@premixtechnologies.com or explore our oil and gas industry solutions.
Related Products from Premix Technologies
- Chemical Dosing Systems
- Methanol Injection Packages
- Corrosion Inhibitor Injection Packages
- Oxygen Scavenger Packages
- Plunger Dosing Pumps
- Injection Quills
- Oil and Gas Industry Solutions
Frequently Asked Questions
How can Premix Technologies help?
Premix supports equipment selection, sizing, MOC, GA drawing, fabrication, testing and quotation.
What data is required?
Share application, liquid properties, tank size, flow rate, pressure, temperature and automation need.
Can Premix customize equipment?
Yes. Premix manufactures customized agitators, dosing skids, metering packages and static mixers.