Chemical Injection

Chemical injection, also called samplers or syringes, the chemical injection and sampler are the end devices of the chemical injection system or the piping medium sampling system.


Chemical injection, also called samplers or syringes, are mainly divided into two types: nozzle type and dropper type. The nozzle can only inject, while the dropper can not only inject but also extract. We need to inspect the pipeline and clean it using corrosion coupons and pipeline pigs. We also need to maintain the pipeline regularly. Chemical Injection plays an important role in pipeline maintenance. The chemical injection and sampler are the end devices of the chemical injection system or the piping medium sampling system.

chemical injection

Material: main carbon steel – blackening treatment – anti-oxidation

Action: Used to inject corrosion inhibitors into pipelines.

The main flange bearing pressure ≥ measuring flange

The check valve is also called the check valve, only injection can not be extracted.

DBB Valve Chemical Injector, one exhaust valve, two ball valves, more secure.

The chemical syringe disassembly device includes: servo valve + retriever + adapter

Our servo valve has both sealing and rotating function


1. Optimize chemical delivery and operational efficiency.

2. Protect and extend asset life.

3. Avoid costly shutdowns.

4. Safely inject a wide variety of

5. Control corrosion with accurate dosing

Chemical injection plays a pivotal role in the oil and gas industry, transforming operations and enhancing efficiency. This article explores the significance of chemical injection in this industry, its purpose, design considerations, and its various applications across different sectors.

Chemical injection quills are indispensable tools in the oil and gas industry, enabling precise and controlled delivery of chemicals into complex systems. By introducing chemicals at specific locations and quantities, these quills optimize processes and address various operational challenges. The ability to deliver additives, facilitate bio-treatment, inject specialized chemicals, and aid in removal and separation processes makes chemical injection quills a valuable asset.

The mounting types are 2″ flange, 2″ farewell access fitting, and 1″NPT welded base.

Operation Temperature: -20℃~150℃

Pressure Rating: 2500 Psi or as Flange Size. (Retractable chemical injectors are 2000 Psi ).

chemical injection2


Model and Parameter Table

Sampling & Injection Assembly

-Code        Plug

Type              Material          Sealing Material

0 No Request        0  CS             0 No Request

Px        1 Hollow Plug      1 316SS             1 Viton O-Ring / PTFE Primary

Body                                  Packing

2 Solid Plug Body   2 316SS             2 HNBR



-Code   Injection Nut

Connection Size                  Material

0 No Request                     0  CS

Nxx  1   1/4″                      1  316SS

2   1/2″                        2  316LSS

3  DSS


-Code     Injection Tube

Line size(x”)       The most effective position for injection

is generally at the center of the pipe

Connection Size-  Material      Nozzle

Sxxx-Lx”   0 No Request    0  CS         0 No Request

1   1/4″        1  316SS       1 open

2   1/2″        2  316LSS      2 Quill

3  DSS        3 Cap & Core


-Code       Nipple and Valve (or end Flange) of Tee

Connection Size     Material

0 No Request        0 CS

1 1/4″ NIPPLE   a 1/4″ NIPPLE and Value 1 316ss

2 1/2″ NIPPLE  b 1/2″ NIPPLE and Value 2 316LSS

3 3/4″ NIPPLE  c 3/4″ NIPPLE and Value 3 DSS

4 1″ NIPPLE   d 1″ NIPPLE and Value  4 INCONEL

5 1/4″ Flange  e 1/4″ NIPPLE and Flange

6 1/2″ Flange  f 1/2″ NIPPLE and Flange

7 3/4″ Flange  g 3/4″ NIPPLE and Flange

8 1″ Flange    h 1″ NIPPLE and Flange

For Example: SI-P221-N12-S122-L4″-T22

SI: Sampling & Injection Assembly

P221: Solid Plug Body in 316LSS Viton O-Ring and PTFE Primary Packing

N12: Injection Nut Connection Size is 1/4″and Material is 316LSS

S122: Injection Tube Connection Size is 1/4″ and Material is 316LSS. The type of nozzle is a quill

L4″: For 4″ pipe.

T22: Nipple of Tee Connection Size is 1/2″

The nipple material is 316LSS

Chemical injection

Dimension, Nozzles, and Mounting Options: Tailoring Solutions Chemical injection quills offer flexibility in terms of dimension, nozzle options, and mounting choices. Customizing the quill length enables precise positioning, optimizing chemical dispersion and effectiveness. Nozzle options, including atomizing nozzles, enhance the distribution of chemicals, ensuring thorough coverage. Mounting options, such as flanged, welded, or threaded connections, offer versatility to suit diverse system requirements. Quill diameter and welding penetration considerations ensure robust installations, particularly in high-pressure applications.

Retractable and non-retractable quills cater to different operational requirements. Retractable quills are designed for systems that require periodic maintenance or are prone to clogging. Their ability to retract without full depressurization simplifies maintenance and reduces downtime. Non-retractable quills, on the other hand, are ideal for systems with infrequent clogging, as they require depressurization for quill removal. Selecting the appropriate type of quill ensures efficient and safe operations. Applications of Chemical Injection Quills: Industry Advancements The versatility of chemical injection quills extends to various applications within the oil and gas industry. Additive injection improves fluid characteristics, mitigates corrosion, and enhances production efficiency. Bio-treatment facilitates the degradation of organic matter, reducing environmental impact. Chemical injection addresses specific operational challenges, such as scaling and fouling, and optimizing system performance. Moreover, chemical injection quills aid in removal and separation processes, improving the overall efficiency of oil and gas operations. Conclusion: Maximizing Efficiency through Chemical Injection Chemical injection quills have revolutionized the oil and gas industry, enabling precise and controlled delivery of chemicals to address operational challenges. By adhering to proper design, material selection, and mounting options, industries can optimize their processes and enhance overall efficiency. With their diverse applications and benefits, chemical injection quills continue to play a crucial role in the oil and gas sector, driving advancements and ensuring sustainable operations.



Chemical injection


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