Our injection quills are engineered for specific operating conditions, considering factors such as vortex shedding, vibration, resonance, erosion, fatigue, and pipe attachment strength in accordance with ASME design requirements.
We manufactures high-performance chemical injection quill assemblies for oil & gas, petrochemical, refinery, and water treatment applications.
Chemical Injection Quill in Piping Systems
NND OIL & GAS chemical injection quills offer a reliable and efficient solution for direct chemical injection into process pipelines. These systems are widely used in industrial applications to improve chemical dispersion and protect pipeline surfaces from corrosion.
Chemical Injection Quill Assembly Design
A chemical injection quill is installed through a pipeline nozzle, extending into the center of the process fluid flow. This is done to ensure that the injected chemical is injected directly into the fluid flow rather than being injected along the pipe wall.
This quill injects chemicals directly into the heart of the pipe, thus ensuring that there is proper mixing while protecting the integrity of the pipe.
Technical Specifications of Chemical Quill
NND OIL & GAS’s specially designed chemical injection quills are manufactured to meet the stringent requirements of industrial operating conditions. They are also available in different configurations based on the pressure and flow requirements of the pipelines.
| Parameter | Specification |
| Series / Type | RT Series (Retrievable Type), DB Series (Double Block & Bleed Type), FXD Series (Fixed Type) |
| Capacity | 1 to 1000 LPH |
| Mounting Connection | Flanged End, Flare Weld, Threaded |
| Pressure Rating | ANSI B16.5 Class 150, 300, 400, 600, 900, 1500, 2500 |
| Material of Construction (MOC) | Carbon Steel, Stainless Steel, Duplex Stainless Steel, Inconel, Hastelloy, Titanium, Teflon, Polypropylene |
| Injection Nozzle Configuration | 45° Notch, 60° Notch, Notch with Groove, Hollow Cone Spray, Full Cone Spray, Perforated |
With these specifications, chemical injection quill assemblies by NND OIL & GAS have the ability to be configured according to various requirements.
Injection Quill Assembly Configuration
A chemical injection quill assembly comprises the quill probe along with mounting and safety components designed for secure installation in high-pressure systems.
Typical assembly components include:
- Injection quill probe
- Mounting connection (flanged, threaded, or welded)
- Isolation valves
- Packing and sealing arrangement
- Optional check valve or non-return valve
The complete assembly ensures safe chemical injection while maintaining system integrity under high pressure and temperature conditions.
Working Principle of an Injection Quill in Piping System
The injection quill extends into the center of the pipeline, ensuring that chemicals are introduced directly into the flowing stream rather than along the pipe wall.
Key advantages include:
- Uniform chemical distribution
- Protection of pipe walls from concentrated chemicals
- Accurate dosing of treatment chemicals
- Extended pipeline service life
Injection quills are commonly used in pipelines carrying hydrocarbons, process fluids, and water, where chemicals such as corrosion inhibitors, biocides, scale inhibitors, and chlorine are injected.
Chemical Injection Quill with Check Valve
In many situations, a chemical injection quill with a check valve is utilized to avoid backflow of fluid from the pipe to the chemical injection system.
The check valve operates only if there is a higher pressure of chemical injection compared to the pressure of the pipe. If there is no chemical injection, then the valve closes.
Benefits of an injection quill with check valve include:
- Prevention of backflow into dosing equipment
- Protection of chemical dosing systems
- Improved operational safety
- Consistent and controlled chemical injection
These types of assemblies are often used in high-pressure pipelines and in chemical injection systems.
Chlorine Injection Quills for Water Treatment
A chlorine injection quill is used in water treatment plants and industrial water systems where the injection of chlorine into the water pipelines is required for water treatment and disinfection purposes.
The direct injection of chlorine into the center of the water stream by the quill ensures the efficient and effective distribution of chlorine throughout the water pipelines for effective treatment and minimization of corrosion.
Chlorine injection quills are commonly used in:
- Municipal water treatment plants
- Industrial water systems
- Cooling water circuits
- Wastewater treatment facilities
Types of Injection Quills
NND oil & gas offers various chemical injection quill configurations, which cater to different operational requirements and maintenance needs.
Online Retrievable Chemical Injection Quills
The online retrievable chemical injection quill assembly enables the insertion or removal of the quill while the pipeline is under full operating pressure.
The retriever and service ball valve can be used for the safe removal of the quill for maintenance or inspection without shutdown of the process line. This is a preventive maintenance approach.
Self Retrievable Injection Quills
Self retrievable injection quill enables removal and maintenance without using a retriever tool. The quill is safely withdrawn using side screws while maintaining system pressure.
This design is typically used where periodic maintenance is required while maintaining operation of the pipeline.
Double Block & Bleed Injection Quill
A double block and bleed injection quill is used in applications that need high levels of safety and isolation in chemical injection.
In this configuration, a primary isolation valve and a secondary isolation valve are used in conjunction with a bleed valve for safe operation in chemical injection or sampling. This setup is normally provided with a non-return check valve that is used for backflow prevention in the process stream during injection.
Fixed Type Injection Quill
The fixed type injection quill is a non-retractable type that is fixed in place within the pipeline. This type is normally applicable in systems that have a provision for shutdown.
The fixed quills offer a simple and rugged solution for continuous chemical injection systems.
Materials of Construction for Chemical Quills
NND OIL & GAS specializes in manufacturing chemical quills using materials that can withstand corrosive chemicals, high pressure pipelines, and harsh environments.
Available materials include:
- Carbon Steel
- Stainless Steel
- Duplex Stainless Steel
- Inconel
- Hastelloy
- Titanium
- PTFE or Polypropylene lined materials
The selection of the material used in the quills depends on the chemical used, the conditions of the pipes, and the process, with the main goal of achieving maximum service life as well as corrosion resistance.
Why choose NND OIL & GAS for Injection Quill Solutions
NND OIL & GAS provides engineered chemical injection quill solutions designed for reliability, durability, and safe operation in demanding industrial environments. We offer standard and custom-designed quills tailored to process conditions, ensuring accurate chemical injection, pipeline protection, and long service life. Contact us today to discuss your requirements and get expert assistance for your application.
Frequently Asked Questions
1. What materials are used for injection quills?
Injection quills are made from a material that is compatible with corrosive chemicals and high pressure in a pipeline system. The material used may be carbon steel, stainless steel, duplex stainless steel, Inconel, Hastelloy, titanium, and PTFE or polypropylene-lined material.
2. What size are injection quills?
The size of the quill for the injection of the chemical depends on the size of the pipeline, the rate of flow of the chemical, and the requirements of the process. Quills for the injection of the chemical are usually designed to reach the center of the pipeline for the proper dispersion of the chemical.
3. How to install a chemical injection quill?
A chemical injection quill is installed in a pipeline nozzle or fitting by a flanged, threaded, or welded connection. The chemical injection quill is extended into the pipeline, reaching into the center of the pipeline, where it injects chemicals directly into the process stream, thus ensuring proper mixing while avoiding contact with the pipe wall.
4. What type of pump is used for chemical injection?
Typically, a chemical injection system will employ a metering pump of a type that is a diaphragm pump or a plunger pump. These pumps offer precise control of the rate of flow and are generally employed in a chemical dosing system in an industrial setting.