Precision-Engineered Pickling Caps for Horizontal Pump Flanges Sundial Investments H-Pump Pickling Caps are purpose-built flange protection caps designed for horizontal pumps used in saltwater disposal (SWD), acid pickling, hydrostatic testing, and general oilfield maintenance operations. Whether you call them pickling caps, storage caps, shipping caps, flange covers, flange plugs, dust caps, or pump protectors — this is the cap your horizontal pump needs. What It Does These caps seal and protect your horizontal pump flanges during acid pickling service, equipment storage, field transport, and routine maintenance shutdowns. They prevent contamination from dust, dirt, moisture, and debris while keeping corrosive treating chemicals contained where they belong. The integrated threaded fill port allows for pressure testing and fluid fill without removing the cap — saving time and reducing exposure risk in the field. Built for the Oilfield Each cap is manufactured using industrial stereolithography (SLA) printing from high-density, chemical-resistant ABS-like resin. This is not hobby-grade 3D printing — this is production-grade additive manufacturing that delivers superior dimensional accuracy, a smooth professional surface finish, and reliable chemical resistance rated for exposure to HCl, H₂S, and common oilfield treating acids used in SWD and well service operations. Available Configurations We currently offer 6 pump flange configurations to fit the most common horizontal pumps in saltwater disposal and oilfield service: 675 12-Bolt — 12 Bolt Pattern, 121mm (4.76") Inner Diameter Baker Only 600 — 12 Bolt Pattern, 86mm (3.39") Inner Diameter 862 / 675 GE ID — 14 Bolt Pattern, 167.5mm (6.59") Inner Diameter 16b 725 — 16 Bolt Pattern, 121.4mm (4.78") Inner Diameter 14b 725 — 14 Bolt Pattern, 121.4mm (4.78") Inner Diameter 12b 725 — 12 Bolt Pattern, 121.4mm (4.78") Inner Diameter Don't see your pump configuration? Contact us — we design and manufacture custom caps for any horizontal pump flange. Optional TPU Gasket Add a flexible TPU gasket for enhanced sealing performance (+$2.00). Recommended for acid pickling service, hydrostatic pressure testing, and any application where a leak-proof seal is critical. Bulk & Volume Pricing Running a fleet of SWD pumps or outfitting a service company? Volume pricing is available on orders of 10 or more caps. Contact us for a quote. Key Features SLA-printed chemical-resistant resin — not injection-molded plastic Precision bolt-pattern alignment for a secure, seated fit Integrated threaded fill port for pressure testing capability Chemical resistance rated for HCl, H₂S, and oilfield treating acids Protects pump flanges during storage, shipping, maintenance, and acid service Designed and manufactured in the USA Made to order — ships within 5-7 business days Applications Saltwater disposal (SWD) horizontal pump protection Acid pickling and chemical treating operations Hydrostatic testing and pressure verification Pump storage and long-term equipment preservation Field transport and shipping protection Maintenance shutdowns and turnaround protection Sundial Investments — Engineering solutions for the oilfield, made by people who work in it.
