Non-Rounded Spiral Wound Gaskets – custom‑shaped sealing solutions designed for non‑circular flange applications, including oval, oblong, rectangular, and other custom geometries. Engineered with the same precision spiral winding technology as standard SWG, these gaskets provide reliable sealing for boiler handholes, manholes, heat exchangers, and other industrial equipment where round gaskets cannot be used. As a leading China non-rounded spiral wound gasket manufacturer, Kaxite produces custom shapes to your exact dimensions, with a wide choice of winding materials (304/316/321/347/Inconel/Hastelloy/Monel) and fillers (graphite, PTFE, mica, non‑asbestos). All gaskets are manufactured to ASME B16.20 standards with full material traceability and fast delivery.
Non-rounded spiral wound gaskets are custom‑manufactured sealing components that follow the same construction principles as standard circular spiral wound gaskets, but are produced in oval, oblong, rectangular, or other non‑circular shapes to fit flanges of matching geometry. They consist of a V‑shaped metal winding spirally wrapped with a flexible filler, providing the same spring‑like resilience, pressure resistance, and thermal cycling capability as their round counterparts.
These gaskets are essential for boiler handholes, manholes, heat exchanger covers, and other industrial access points where standard round gaskets cannot seal effectively. Kaxite manufactures non‑rounded spiral wound gaskets to customer specifications – providing inside dimensions (A×B), width (b), thickness (s), or a detailed drawing. As a trusted China custom spiral wound gasket supplier, we offer a complete range of materials and fillers to suit your operating conditions.
Oval and oblong custom shapes
Oval shape – common for handholes
Oblong shape – for manholes
Oval, oblong, rectangular, or any custom geometry – we manufacture to your drawing or specifications.
Winding alloys from 304 to Inconel/Hastelloy; fillers include graphite, PTFE, mica, and non‑asbestos.
Spiral wound construction provides resilience against thermal cycling, pressure fluctuations, and vibration.
With graphite filler up to 850°C, mica up to 1200°C – suitable for steam, gas, and chemical service.
Manufactured to industry standards with full material traceability and dimensional inspection.
Custom orders typically ship within 10–15 days; rush options available for critical maintenance.
Because no universal standard exists for non‑rounded shapes, please provide the following when ordering:
Order Example:
SWG Oval – A=150mm, B=100mm, b=20mm, s=3.2mm – Winding AISI 316 – Filler Graphite – with Inner Ring
| Winding Material | Recommended Fillers | Max. Temperature (°C) | Typical Applications |
|---|---|---|---|
| 304 / 316 SS | Graphite / PTFE | 850 / 260 | General industrial, boiler, chemical |
| 321 / 347 SS | Graphite / Mica | 850 / 1200 | High‑temperature, boiler superheaters |
| Inconel 600 / 625 | Graphite / PTFE | 850 / 260 | Corrosive, high‑temp, marine |
| Hastelloy C276 / B3 | Graphite / PTFE | 850 / 260 | Strong acids, chlorides, chemical |
| Monel 400 | Graphite / PTFE | 850 / 260 | Seawater, HF, marine boilers |
Mica filler recommended for extreme temperatures up to 1200°C. PTFE for chemical resistance up to 260°C.
Case Example: Boiler Handhole Seal Replacement
A chemical plant in Texas was experiencing frequent steam leaks from oval handhole covers on its high‑pressure boilers. Standard flat gaskets were failing due to thermal cycling and pressure fluctuations. Kaxite supplied oval non‑rounded spiral wound gaskets with AISI 316 winding and graphite filler, custom‑sized to each handhole (A=180mm, B=120mm, b=22mm). The spiral wound construction maintained sealing integrity through multiple thermal cycles, and after 18 months of service, zero leaks were reported, reducing maintenance downtime by 40%.
For other spiral wound gasket types, explore our Standard SWG, Exhaust SWG, Special Materials SWG, and SWG for Heat Exchangers.
To source non-rounded spiral wound gaskets wholesale, please provide:
Need a custom shape that’s not listed? Send your inquiry with a drawing or sample, and our engineering team will provide a quotation within 24 hours.
★ China's Leading Non-Rounded Spiral Wound Gasket Manufacturer – Request Your Quote
Contact Kaxite for factory‑direct pricing, custom shapes, and expert technical support.
Address
No 432 Zhenhai Middle Road, Luotuo Street, Zhenhai District, Ningbo City, Zhejiang China
