You are here: Home » News » What Is a Pipe Fitting Cap?

Contact Us

ADDRESS

 Room 919, Building 1, Block 6, China Resources Land Plaza, Lixia District, Jinan City, Shandong Province, China
 

E-MAIL

TELEPHONE

 +86-15628995596
 +8615628995596

What Is a Pipe Fitting Cap?

Views: 0     Author: Site Editor     Publish Time: 2025-04-28      Origin: Site

Inquire

facebook sharing button
twitter sharing button
line sharing button
wechat sharing button
linkedin sharing button
pinterest sharing button
whatsapp sharing button
kakao sharing button
snapchat sharing button
telegram sharing button
sharethis sharing button
What Is a Pipe Fitting Cap?

A pipe fitting cap is a type of pipe fitting used to close the end of a pipe. It serves as a permanent or temporary seal in plumbing and industrial systems, preventing fluid, gas, or other substances from flowing out of the open pipe end. Pipe caps come in various sizes, materials, and connection styles to match different types of piping systems.


They are widely used in

Water supply systems

Wastewater and drainage pipelines

Agricultural irrigation

Gas and oil pipelines

Construction and industrial installations


Types of Pipe Fitting Caps


Pipe caps are classified based on their connection type, which determines how they are installed:


1. Threaded Pipe Caps

Designed for pipes with male threads

Easy to install and remove

Common in household plumbing and low-pressure systems


2. Socket Weld Pipe Caps

Fitted over the pipe and bonded using solvent welding or glue (for PVC/CPVC)

Offers strong and leak-proof connections

Popular in PVC, CPVC, and PE systems


3. Butt Weld Pipe Caps

Welded directly to the pipe end

Mainly used in high-pressure or industrial piping

Made of metal or thermoplastic materials like HDPE or PP


4. Compression End Caps

Used in polyethylene piping systems

Installed with compression fittings—no welding or glue needed

Ideal for agricultural irrigation and water supply projects


5. Push-Fit End Caps

No tools required—simply push onto pipe

Mostly used for DIY or small-scale plumbing installations


Pipe Cap Materials and Industry Standards

Pipe caps are manufactured from various materials to suit different fluid types, pressures, and environments:

MaterialDescriptionApplications
PVCLightweight, cost-effective, corrosion-resistantWater lines, drainage
HDPEFlexible, UV-resistant, durable under pressureAgriculture, municipal water
CPVCHigh-temperature resistanceHot water systems
PPRHigh thermal and pressure resistanceIndoor plumbing
Stainless SteelIndustrial-grade, corrosion-resistantOil & gas, chemicals

Common standards include:

ANSI / ASME B16.9

DIN 2617

ISO / EN 1254


Common Sizes of Pipe Fitting Caps

Size (Inch)Metric Equivalent (mm)
1/2"20mm
1"25mm
2"50mm
3"75mm
4"110mm

Pipe caps are available in both metric and imperial sizes. Common dimensions include:

Size (Inch) Metric Equivalent (mm)

Example

PVC pipe cap 50mm

HDPE pipe cap 1 inch


Applications of Pipe Fitting Caps


Pipe caps are essential in various pipeline systems:


Temporary sealing during pressure testing or maintenance

Permanent sealing in dead-end pipe sections

Irrigation system terminations for crops or gardens

Plumbing systems in homes, hotels, and buildings

Industrial and chemical plants for fluid control


How to Install a Pipe Fitting Cap


Installation depends on the cap type and pipe material:


Threaded caps: Wrap pipe threads with Teflon tape and screw on

Socket caps: Use appropriate primer and solvent cement

Butt-weld caps: Heat and weld using hot plate fusion

Compression caps: Slide on and tighten with a wrench

Push-fit caps: Simply push onto the end—no adhesive or clamps


Always ensure proper alignment and pressure rating compatibility before installation.


FAQs About Pipe Fitting Caps


Q1: Can pipe caps be reused?  

A: Threaded and compression caps can often be reused, while welded or glued caps are usually permanent.


Q2: What's the difference between a pipe cap and a plug?  

A: A cap seals the outside of the pipe (female connection), while a plug fits inside the pipe or fitting (male connection).


Q3: Are pipe caps pressure-rated?  

A: Yes, each cap has a rated pressure, depending on its material, size, and standard (e.g., SCH 40, PN16).


Q4: Can pipe caps be used for both hot and cold water?  

A: Yes, depending on the material. CPVC and PPR caps are suitable for hot water; PVC and HDPE are for cold water.


Pipe fitting caps are essential components for sealing pipeline ends across various industries. Whether you’re building a home plumbing system, maintaining a municipal water network, or installing an irrigation system, choosing the right pipe cap—by type, size, and material—is key to ensuring performance and longevity.


Looking for high-quality pipe fitting caps? Browse our full range of PVC, HDPE, and compression caps available in all major sizes.



Home
Copyright ©️ 2024 Shandong Haili Pipeline Technology Co., Ltd.