These simplex strainers are heavy duty fabricated strainers often referred to as basket strainers or pipeline strainers in the oil and gas industry.
Simplex strainers remove rocks, sand, dirt, pipe scale, grit, welding beads and other solids from industrial liquids, gases, steam, and water. 

Type 55 Simplex Strainer with Flanged Closure
Type 55 Simplex Strainer with Flanged Closure
Basket for Type 55 Flanged Top Simplex Strainer
Basket for Type 55 Flanged Top Simplex Strainer
Type 55 Simplex Strainer with Swing Bolt Quick Opening Closure
Type 55 Simplex Strainer with Swing Bolt Quick Opening Closure

Winston/Royal Guard Types 55 and 56 heavy duty fabricated simplex strainers, many times referred to as basket strainers and pipeline strainers, are installed to protect compressors, pumps, meters, and other downstream equipment by removing potentially damaging solids from liquids, gas, and steam. The large internal basket offers a low pressure drop with a large contaminant holding capacity.  The Type 55 offers an inline nozzle arrangement for a straight through flow. The Type 56 has an offset inlet and outlet design.

Type 58 large horizontal simplex strainers are typically installed in locations where there may limited overhead space for basket removal and in cases where an extremely large basket total open area is required. 

Industrial simplex strainer applications include natural gas, process gas, chemicals, hydrocarbons, process liquids, water, steam, and others for the refining, chemical, petrochemical, pulp and paper, natural gas, and other industries.  Fabricated strainers are extremely robust and provide heavy duty service to industry.

Standard material for the simplex strainer body and flanges is carbon steel with 304 stainless steel basket (carbon steel, 316 stainless steel, and other alloys are optional).  Some available materials are 300 series stainless steels (all or wetted parts only), Monel®400, Nickel 200, Hastelloy®B and C276, Inconel®, Incoloy®, and chrome moly.  Except for chrome moly, the basket can be manufactured in any of these materials.

The Internal perforated strainer basket is manufactured from heavy gauge material and seam welded for maximum strength.

A complete selection of perforated metal and wire cloth is available for various openings and retention requirements, and in many alloy materials. Typical strainer basket openings are 80 mesh (0.0070”opening) for gas service, 40 mesh (0.0150” opening) for steam, and perforated with 1/8” diameter holes on 3/16” centers for process liquids. Strainer baskets will have perforated support for most wire mesh sizes.

The Top cover of the simplex strainer is available as a bolted blind flange with lifting handle or davit, or a quick-opening closure for easier and faster access for basket cleaning. Inlet/outlet styles include flanged or butt weld.

Options include ASME Code stamp, NACE compliance, quick-opening closure, open bottom basket for blowdown, support legs or skirt, lifting eye(s), differential pressure connections, vent, grounding tabs, steam jacket, insulation rings, painting per specification, and other customer requirements.

ASME Code Certified: Winston/Royal Guard is an ASME Section Vlll, Division 1 Code certified manufacturing facility with National Board certification. Capabilities include all types of non-destructive testing with a rigidly controlled Quality Control system.

Type 58 very large horizontal simplex strainer
Type 58 Very Large Horizontal Simplex Strainer