Enquire Now
GuideDiode Trading EST · 5 min read
31 October, 2026 | 
AdminShort answer: Spiral wound gaskets (SWG) seal raised-face flanges in moderate to high pressure and temperature duty; ring joint (RTJ) gaskets are solid metal rings that seal grooved flanges at the highest pressures. Diode Trading EST is a spiral wound gasket supplier saudi arabia and supplies RTJ rings from Dammam for oil, gas and process work.
Semi-metallic and metallic gaskets are standard on refinery, pipeline and petrochemical flanges. They look simple, but material, ring type and flange match all matter for a leak-free joint.
Free engineering tools
A spiral wound gasket is made by winding a V-shaped metal strip together with a soft filler strip. The metal gives strength and recovery; the filler seals. Most SWGs include a solid outer guide ring, which centres the gasket on the flange, and many include an inner ring that protects the windings and reduces flow turbulence.
Buyers asking for an swg supplier ksa typically mean this construction. Common material choices are:
SWGs are usually made to ASME B16.20 dimensions for ASME flange classes. Always state the nominal size, pressure class, flange facing and ring types when ordering.
For high-pressure pipelines, valves and wellhead equipment, flanges have a machined groove and the seal is a metal ring pressed into it. If you search for ring joint rtj metal gaskets saudi arabia, you will meet these common styles:
Rings are made from soft iron, low carbon steel, stainless steel or other alloys. The ring must be softer than the flange so it deforms instead of damaging the groove, and surface finish must be fine. A damaged ring groove should be repaired rather than ignored.
| Feature | Spiral wound | Ring joint |
|---|---|---|
| Flange type | Raised face or flat | Grooved |
| Construction | Metal + filler winding | Solid metal ring |
| Pressure | Moderate to high | Very high |
| Reusable | No | Generally not recommended |
| Typical sector | Refinery, chemical, power | Oil and gas, wellhead |
Flange faces must be clean, parallel and free of radial scratches. Bolts should be tightened in a cross pattern in at least three stages, with lubrication and torque matched to the gasket manual. Never reuse spiral wound or ring joint gaskets; a used one will not recover its seal.
The most frequent errors are using spiral wound gaskets without the correct inner or outer ring for the pressure class, mixing up ring types on API flanges, and reusing rings. Another is selecting the filler without checking temperature: PTFE filler limits the gasket temperature well below graphite. Poor flange faces also matter: radial scratches across a seating surface will leak through even a perfect gasket, which is why a sealing surface finish is specified for these joints.
Colour coding on the outer guide ring helps identify winding metal and filler on site, and is a quick check at receipt to confirm you have what you ordered. If your gasket specification calls for a particular marking, tell us in your enquiry.
We also stock graphite and PTFE sheet, compressed non-asbestos fibre, rubber gasket sheet, and gland packing, so one enquiry can cover the full flange schedule for a turnaround. Ask us for the whole list when you quote.
When specifying a new line, many engineers choose spiral wound gaskets with graphite filler for steam and hydrocarbon service, and with PTFE filler for chemical service. In the case of heat exchangers, special profiles with partition ribs may be required, so mention the exchanger type if that is your application.
Stock levels for these gaskets depend on size and class, so send your flange list early. If a size is not available in the exact specification, we will say so and propose an alternative rather than leaving you to find out at the flange.
Spiral wound gasket.
Graphite for heat and steam, PTFE for aggressive chemicals, as your duty requires.
Re-use is generally not advised because the ring is deformed during sealing.
Send your flange data and we will help match the gasket.
Tell us the material, thickness or size, quantity and application for your spiral wound or ring joint gasket order. Everything we list is in stock and ships from our Dammam warehouse, with export across the GCC. Send your list through our request a quote page, message us on WhatsApp at +966 56 838 3649, or email sales@diode.sa.
Diode Trading EST in Al Khobar and Dammam. We are a supplier and trader holding stock, not a manufacturer.
Yes, we act as a ring joint gasket supplier saudi arabia projects can ask for specific sizes and groove types, and we can discuss rtj gaskets ksa wide.
Customers also ask for metal sheath gaskets saudi arabia plants use on flanged joints. Send the size, pressure class and material on WhatsApp +966 56 838 3649 and we confirm availability.
See our range of high-visibility safety mats and markers designed to reduce trip hazards across your site.
31 October, 2026 | AdminAnti static rubber sheet Saudi Arabia and ESD rubber sheet Saudi guide: static dissipative vs conductive, uses, grounding and what to check before buying.
Read more 31 October, 2026 | AdminRubber corner guard, wall bumpers and bumper rails in Saudi Arabia: how to choose, install and maintain impact protection for walls and columns.
Read more 31 October, 2026 | AdminCorner guards in Saudi Arabia and wall impact protection systems: types, materials, where to fit them and what to ask a wall guards supplier.
Read moreDiode Trading EST supplies these Rubber Sheets, Gaskets & Seals from stock in Dammam, with delivery across Saudi Arabia and the GCC.
Stock in Dammam · MTC with every order
Need a price or lead time? Talk to our sales team.