OGGeneral trading · UAE & GCC
Gaskets and stud bolts supplier in the UAE
Spiral wound, ring joint and non-metallic gaskets, insulating kits and stud bolts with nuts, matched to your flanges and service conditions.
Gaskets
| Type | Standard | Used for |
|---|---|---|
| Spiral wound with inner and outer rings | ASME B16.20 | Raised-face flanges in most hydrocarbon and steam services |
| Ring joint: R, RX and BX | ASME B16.20, API 6A | RTJ flanges and wellhead equipment in high-pressure service |
| Non-metallic flat gaskets | ASME B16.21 | Water, utility and low-pressure services |
| Kammprofile and jacketed gaskets | ASME B16.20 | Heat exchangers and difficult joints |
| Insulating gasket kits | Manufacturer design | Electrical isolation, for example at cathodic protection breaks |
Stud bolts and nuts
| Item | Standard | Notes |
|---|---|---|
| General bolting | ASTM A193 B7 with A194 2H nuts | Carbon steel flanges in general service |
| Low-temperature bolting | ASTM A320 L7 with matching nuts | Low-temperature services |
| Sour service bolting | ASTM A193 B7M with A194 2HM nuts | Hardness-controlled for NACE services |
| Stainless bolting | ASTM A193 B8/B8M with A194 8/8M nuts | Corrosive services |
| Coatings | PTFE, zinc-nickel or hot-dip galvanised | On request |
Ring joint gaskets should be softer than the flange groove they sit in, so the gasket deforms and seals without damaging the flange. Tell us the flange material and we will propose a suitable ring material.
What to include in your enquiry
- Flange size, pressure class and facing
- Gasket type, winding and filler materials, and ring materials
- Ring number for RTJ joints, for example R-24 or RX-24
- Bolt diameter and length, or the flange data so we can work them out
- Bolting grade and coating
- Quantities, including spares
Frequently asked questions
Can you supply complete flange bolting sets?
Yes. We can supply each joint with its gasket, stud bolts and nuts, packed and labelled by joint if you need it.
What gasket should I use for an RTJ flange?
A ring joint gasket whose type and number match the groove, for example R-24 or RX-24, in a material softer than the flange.
Do you supply insulating gasket kits?
Yes, with the sleeves and washers needed to isolate the bolts as well as the flange faces.
Which bolting is used for sour service?
Hardness-controlled B7M studs with 2HM nuts are the usual choice where NACE MR0175 / ISO 15156 applies.
Start a quotation
Have an MR, BOQ or equipment list?
Send it to us and we will come back with a priced quotation and lead times.