Class 300 flange 7 inch is an ASME Class 300 flange, thicker and higher rated than Class 150, for higher pressure steam and process lines, sized for 7 inch (DN175) pipe.
Pair it with a Class 300 gasket, bolts and a mating flange of the same rating. Confirm face type and bore with your quote.
What is a class 300 flange 7 inch?
A pipe flange is a ring bolted to another flange, valve or pump, with a gasket between them. Flanges let a line be opened for maintenance without cutting the pipe.
Flanges are made to a standard and pressure rating. PN16 follows European dimensions; Class 150 and Class 300 follow American ASME dimensions. Therefore, both flanges at a joint must share the same standard, rating and size.
Key terms explained
- Pressure rating
- The PN or Class number that sets flange strength and drilling.
- Raised face
- A raised ring on the flange face where the gasket seats.
- PCD
- Pitch circle diameter of the bolt holes.
- DN
- Nominal size in millimetres.
- Plate flange
- A flat flange welded to the pipe end.
Features and benefits
- PN16, Class 150 and Class 300 ratings.
- Sizes from 1/2 to 14 inch.
- Plate, threaded and adaptor types.
- Matching gaskets and blind flanges available.
- Size buttons link the same size in other ratings.
Technical specifications
| Product | Pipe flange |
|---|---|
| Rating | Class 300 |
| Nominal size | 7 inch / DN175 |
| Type, face and material | Confirm with quote |
| Supplier | Sparks Plumbing Experts Ltd, Nairobi |
| Supplier | Sparks Plumbing Experts Ltd, Nairobi |
Sizes, grades and ratings depend on stock and model. Tell us what you need, and we will confirm before you order.
Applications of a class 300 flange 7 inch
- Pump connections. Suction and discharge flanges.
- Valve installation. Gate, butterfly and check valves.
- Water mains. Pipeline joints.
- Steam lines. Class 150 and 300 flanges.
- Boiler houses. Feed and steam headers.
- Fire lines. Pump and valve connections.
- Process plant. Oil, chemical and air lines.
- Tanks. Nozzle connections.
- HVAC chilled water. Pumps and chillers.
- Water treatment. Filters and vessels.
How to choose and install
- Match standard, rating and size on both sides.
- Check bolt count and PCD against the mating flange.
- Use the right gasket for the fluid and temperature.
- Tighten bolts evenly in a cross pattern.
Why choose Sparks Plumbing Experts
- Valves, flanges and gaskets togetherComplete a pipeline joint with matching valves, flanges, gaskets and bolts.
- Pressure-rated optionsMany items come in PN16, class 150 or class 300 ratings, so you can match the line.
- Stainless and carbon steelChoose stainless for corrosion resistance or carbon steel where it suits the service.
- Plant maintenance sparesKeep critical spares on hand for planned shutdowns and breakdowns.
- 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: Flanges · Gaskets · Valves · Hardware and Fasteners.
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
Will a Class 300 7 inch flange fit my valve?
Yes, if the valve flange is also Class 300 and 7 inch. Check the drilling before ordering.
What details do you need to quote pipe flanges?
Tell us the standard or rating, size, type and quantity. 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 pipe flanges 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 pipe flange cost in Kenya?
The price depends on the item, size or model and the quantity. Therefore, send your list with a quote request and we will reply with current figures.
Can PN16 and Class 150 flanges be bolted together?
They are different standards and should not be mixed.
Which flange rating do I need?
One that matches the valve or pump and covers the line pressure and temperature.
Do you supply bolts and gaskets?
Yes. Ask for a full flange set.
What material are the flanges?
Usually carbon steel. Confirm material with the quote.
Are weld neck flanges available?
Ask us. We list plate, slip-on, neck and socket weld types.
People also search for
pn16 vs class 150 flange
Different standards; they should not be mixed.
flange size chart
Sizes run from 1/2 to 14 inch, or DN15 to DN350.
raised face vs flat face
Raised face for spiral and sheet gaskets; flat face for cast iron equipment.
flange bolt tightening
Tighten in a cross pattern in stages.
class 300 flange uses
Higher pressure steam and process lines.
Pipe flanges price in Kenya
Prices change with size, model and quantity. Request a quote from Sparks Plumbing Experts for current figures.
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