Strainers & Baskets

Temporary vs permanent strainer — what to specify?

Temporary conical strainers protect equipment during commissioning and are often sacrificial after one run. Permanent basket strainers in vessels are cleaned and reused — stronger mesh, support and handles required. State service life expectation and whether element is disposable.

Temporary cone strainers for commissioning are often specified by flange rating and line size (e.g. 4 inch Class 150) with mesh or perforation opening — we confirm open area is adequate for startup flow without immediate blind-off.

Conical pipeline strainer vs cylindrical basket

Conical inserts suit flange-mounted startup service with defined flange rating and line size. Cylindrical baskets suit sealed housings with bayonet or bolt closures — dimensions follow vessel sheet. Y-strainer inserts need correct seat depth and tab orientation.

Permanent baskets may need lift handles rated for wet weight, vent holes or drain plugs — include on assembly drawing. Basket height vs housing clearance must allow insertion and removal without damaging mesh.

Mesh opening vs perforated support

Coarse protection may use perforated plate alone; finer retention uses mesh alone or mesh on perforated support for strength. Retention, allowable differential pressure and particle type drive the build — provide mesh count or hole size target and fluid properties.

Y-strainer screens differ from basket types in seat depth and tab clocking — send strainer model and a photo of the removed screen when replacing. Perforated-only elements suit coarse river water intake; mesh on support suits finer pipeline protection.

Materials and corrosion

SS316L for chlorinated water, chemicals and food CIP; SS304 for many water and air duties. Handles and lift rings match basket alloy unless drawing specifies otherwise.

Pulp and paper baskets may see fiber matting — heavier wire or wider opening with accepted differential pressure rise may be recommended in DFM. Chemical strainers list media pH and temperature for alloy selection.

What should I send for an accurate strainer quotation?

Line size or housing model, retention target, mesh or perforation spec, quantity, drawing and whether temporary or permanent duty.

Multiple baskets for parallel vessels on the same project can share one drawing with quantity breakdown — note if interchangeability between vessels is required. Spare baskets for turnaround can be quoted on accelerated schedule when shutdown date is fixed.

MOQ and turnaround for shutdown projects

Small batches of temporary strainers are common for shutdowns — lead time quoted against current capacity. Reusable baskets may need first-article fit check — schedule confirmed per project.

Related conical strainer family products appear in the product range below. Combined perforated and mesh builds link to Custom Fabrication when the drawing shows welded support frames.

Related products and next steps

Conical and basket family products are listed in the product range section. Temporary startup strainers and permanent vessel baskets can be quoted from the same RFQ when you describe commissioning and operating phases separately. Combined mesh-on-perforated builds or custom handles route to Custom Fabrication. Application solutions in the industry browse section show typical strainer duties by sector — include flange or housing model, retention target and mesh or perforation spec when you inquire.

Shutdown and turnaround projects often need mixed quantities of temporary cones plus spare permanent baskets — list each line size and service phase on one RFQ for consolidated lead time. Lift handle load rating, vent holes and drain plugs should appear on the vessel drawing to avoid field modification. Photo of the removed element with flange rating visible accelerates replacement quotes when the original drawing is lost.

For Y-strainer and basket housings from major manufacturers, include model number and revision on the RFQ — tab clocking and seat depth vary by series. Coarse river water intake may accept perforated-only elements; finer pipeline protection often needs mesh on perforated support — state allowable differential pressure rise before change-out so open area is not under-sized.