Expansion bellows absorb heat expansion, vibration and small misalignment in pipework. They protect pumps, flanges and supports.
We list stainless steel bellows in sizes 1 1/2, 2, 2 1/2, 3, 4 and 6 inch. Choose a size above for details.
What are expansion bellows?
A stainless steel expansion bellow is a flexible pipe joint with a corrugated stainless steel bellows between two flanges. The bellows flex to absorb movement while keeping the line sealed.
Pipes grow when hot, and pumps vibrate. Therefore, bellows are fitted in steam, hot water, cooling and pump lines to stop that movement cracking joints or loading equipment.
Further reading
- Expansion joints in pipework (Wikipedia)
- Stainless steel properties (Wikipedia)
- Thermal expansion explained (Wikipedia)
Key terms explained
- Bellows
- A thin corrugated metal tube that can stretch, compress and bend.
- Axial movement
- Movement along the pipe length, caused mainly by heat.
- Anchor and guide
- Supports that fix and steer the pipe so the bellows move as designed.
- PN rating
- The pressure class of the joint and flanges.
Features and benefits
- Absorbs heat expansion and vibration.
- Stainless steel bellows for heat and steam.
- Flanged ends for easy fitting.
- Protects pumps and supports.
- Reduces noise carried along pipes.
Technical specifications
| Product | Expansion bellows |
|---|---|
| Sizes | 1 1/2, 2, 2 1/2, 3, 4 and 6 inch |
| Bellows | Stainless steel |
| Ends | Flanged |
| Supplier | Sparks Plumbing Experts Ltd, Nairobi |
Each size has its own page with sizing details. Choose a size above, then request a quote.
Applications of expansion bellows
- Pump connections. Isolates pump vibration from pipework.
- Steam lines. Absorbs heat growth of steam mains.
- Boiler rooms. Protects boiler connections.
- Chiller plants. Isolates chiller and pump vibration.
- Cooling towers. Absorbs movement on tower pipework.
- Hot water mains. Absorbs expansion of long hot runs.
- Generator exhausts. Absorbs heat movement where rated.
- Process lines. Protects equipment nozzles.
- Building expansion joints. Allows pipes to cross structural joints.
How to choose and install
- Size by pipe size, pressure, temperature and movement.
- Install between anchors and guides.
- Do not use bellows to correct poor alignment.
- Check flange drilling matches.
Why choose Sparks Plumbing Experts
- Every common pipe materialGI, PPR, PVC, HDPE, brass and stainless fittings are all stocked, so you can match any existing system.
- Common sizes in stockMost fitting types come in several sizes, from small domestic sizes up to larger mains sizes.
- Pipes, fittings and valves togetherPipes, fittings, valves, clamps and jointing products come in one order.
- Help with thread and size standardsWe help you confirm inch and millimetre sizes before you buy, which avoids return trips.
- Visit or collect in NairobiOur store is at KCB Building, Enterprise Road, in the Industrial Area, so you can see parts before you buy or collect your order.
- Quotes your wayAsk for prices by phone, WhatsApp, email or the online quote form, whichever suits you on site.
- Over 1,600 products in one placeOur catalogue covers 55 categories, so one supplier can handle most of your parts list.
- Help choosing the right partSend a nameplate photo, a drawing or the old part, and we help you match size and specification.
- Single items or project quantitiesWe price a single replacement part just as readily as a full site order.
- Supply across East AfricaWe serve customers across Kenya, and we also supply buyers in Uganda and Tanzania.
Related products and accessories
Browse more: Hoses, Flexible Pipes & Irrigation · Flanges · Industrial Pumps · Boiler Accessories.
Ordering from Sparks Plumbing Experts
We supply customers across Kenya, and we also serve buyers in Uganda and Tanzania. You can collect from our store at KCB Building, Enterprise Road, Nairobi, or ask us about delivery to your site. Send your quantities and specifications, and we will reply with prices and availability.
Request a Quote WhatsApp 0726 086 895
Frequently asked questions
What do expansion bellows do?
They let pipework move with heat and vibration without stressing joints.
Which sizes of expansion bellows do you list?
We list 1 1/2, 2, 2 1/2, 3, 4 and 6 inch.
Rubber joint or stainless bellows?
Rubber joints damp noise in water lines. Stainless bellows suit heat and steam.
Do expansion bellows need anchors?
Yes. Pipework must be anchored and guided as the design requires.
What details do you need to quote stainless steel expansion bellows?
Tell us the pipe size, pressure, temperature, movement and flange drilling. A photo of the old part, a nameplate or a drawing also helps. Then call or WhatsApp 0726 086 895, or use the quote form on this page.
Do you deliver stainless steel expansion bellows outside Nairobi?
Yes. We supply customers across Kenya, and we also serve buyers in Uganda and Tanzania. Delivery or courier arrangements are agreed when you confirm the order.
How much does a stainless steel expansion bellow cost in Kenya?
The price depends on the size, rating and quantity. Therefore, send your list with a quote request and we will reply with current figures.
Can expansion bellows correct misalignment?
Only small amounts. Align pipework properly before fitting.
How long do expansion bellows last?
It depends on movement cycles and conditions. Inspect them during maintenance.
Do bellows need anchors?
Yes. Pipework must be anchored and guided as the design requires.
Can bellows be twisted during fitting?
No. Twisting damages the bellows.
Are bellows suitable for water lines?
Yes, where rated. Rubber joints are also common on water.
People also search for
rubber vs metal expansion joint
Rubber joints damp vibration on water lines. Metal bellows handle heat and steam.
how to install expansion bellows
Fit between anchors, align the flanges, and remove shipping bars only after installation.
expansion joint for pump
A flexible joint on pump suction and delivery cuts vibration and noise.
Expansion bellows price in Kenya
Prices change with size, model and quantity. Request a quote from Sparks Plumbing Experts for current figures.
axial vs lateral movement
Axial is along the pipe. Lateral is sideways.
expansion bellow failure causes
Over-extension, torsion, poor anchors or corrosion.
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