Y Strainer Flanged Class 150 Supplier India — WCB CF8 CF8M | KELOR

Y Strainer Flanged End Class 150 Supplier in India — WCB / CF8 / CF8M | KELOR

Krishna Industries (KELOR), based in Ahmedabad, Gujarat, supplies Y Strainers with Flanged End Class 150 — WCB (ASTM A216) / CF8 (SS304) / CF8M (SS316) body — SS304 / SS316 perforated screen — 10 / 20 / 40 / 80 / 100 mesh — DN25 (1″) to DN300 (12″) — ASME B16.5 raised face — API 598 pressure tested — GST invoice — MOQ 10 Nos — Pan India dispatch from Ahmedabad.

Mill Test Report 3.1 can be provided on request from verified vendors. API 598 hydrostatic test certificate provided with every order. A193 B7 stud bolts with 2H nuts available for flanged bolting on consolidated project BOMs.

⚡ Quick Reference

SupplierKrishna Industries (KELOR) — Ahmedabad, Gujarat

Body MaterialWCB / CF8 (SS304) / CF8M (SS316)

Screen MaterialSS304 / SS316 Perforated

End ConnectionFlanged — ASME B16.5 Class 150 RF

Size RangeDN25 (1″) to DN300 (12″)

Mesh Options10 / 20 / 40 / 80 / 100 Mesh

Pressure ClassASME Class 150 (PN20)

MOQ10 Nos per size per body material

Y Strainer Flanged End Class 150 — Overview

Krishna Industries (KELOR) supplies the Y Strainer with Flanged End Class 150 — a mechanical filtration device installed in piping systems to remove solid particles such as rust, scale, sand, welding slag, and pipe debris from process fluids. The Y-shaped body directs flow through a removable perforated or wire mesh screen that traps debris while allowing clean fluid to pass downstream. Y strainers are the most widely specified strainer type in industrial piping for protecting downstream equipment including centrifugal pumps, control valves, flow meters, heat exchangers, and steam traps from damage caused by solid particles carried in the process stream.

The flanged end connection (ASME B16.5 Class 150 raised face) allows bolted connection between pipeline flanges — the standard and most reliable connection method for process piping in chemical plants, refineries, water treatment, HVAC, and steam systems. KELOR supplies Y strainers in three body materials — WCB carbon steel for general service, CF8 (SS304) for non-chloride corrosive service, and CF8M (SS316) for chloride-containing and aggressive chemical service — from verified vendor partners with full documentation support, API 598 testing, and Pan India dispatch from the Ahmedabad warehouse.

How a Y Strainer Works

A Y strainer is named for its Y-shaped body geometry. The pipeline fluid enters the straight leg of the Y and passes through the screen element installed in the angled leg (the pocket). Solid particles larger than the screen openings are trapped on the outer surface of the screen while clean fluid exits through the outlet. The trapped debris accumulates on the screen surface over time, and the pressure drop across the strainer increases. When the pressure drop reaches the alarm point (typically 1.0–1.5 bar), the strainer must be cleaned. Cleaning is performed by removing the end cap, extracting the screen, and washing or blowing down the accumulated debris.

Fluid Enters Inlet

Process fluid (water, steam, oil, gas, chemical) enters the straight leg of the Y-shaped body at pipeline velocity. Fluid is directed toward the screen element in the angled pocket.

Screen Filtration

Fluid passes through the perforated screen. Particles larger than the mesh opening are trapped on the outer surface of the screen. Clean filtered fluid passes through to the outlet.

Debris Accumulation

Trapped debris accumulates on the screen surface over time. Pressure drop across the strainer increases progressively. Monitor differential pressure — clean when it reaches 1.0–1.5 bar.

Screen Cleaning

Shut down, isolate the strainer, remove the end cap, and extract the screen. Clean by brushing, compressed air, or backwashing. Replace screen if damaged. Reassemble and return to service.

Body Material Selection

WCB Carbon Steel CF8 (SS304) CF8M (SS316)

Body Material	Standard	Specify For	Not For
WCB	ASTM A216 WCB	Steam service, oil and gas, general industrial water, non-corrosive chemical, compressed air — most economical option — standard for Indian process plants	Corrosive chemical, chloride water, seawater, pharmaceutical — WCB corrodes in these services
CF8 (SS304)	ASTM A351 CF8	DM water, mild chemical, HVAC chilled water, food processing non-chloride, general corrosion-resistant service — good balance of corrosion resistance and cost	Seawater, chloride above 150 ppm, treated cooling water with chlorine biocide — CF8 pits in chloride service
CF8M (SS316)	ASTM A351 CF8M	Seawater, chemically treated cooling water, chloride service, pharmaceutical process, coastal industrial, aggressive chemical — 2–3% molybdenum provides pitting resistance	Standard non-corrosive service where WCB is adequate — CF8M premium cost only justified for corrosive or chloride service

📚 CF8 vs CF8M — When the Difference Matters

CF8 is the ASTM A351 casting grade equivalent to SS304 — 18% chromium, 8% nickel, no molybdenum. CF8M is equivalent to SS316 — same Cr-Ni base plus 2–3% molybdenum. The molybdenum in CF8M provides resistance to chloride pitting and crevice corrosion that CF8 does not have. For Indian process plants, the critical deciding factor is chloride concentration: if the process fluid contains more than 150 ppm chloride (typical of treated cooling water with chlorine-based biocide, coastal raw water, or chemical process with chloride contamination), specify CF8M. For DM water, mild chemical, and HVAC non-chloride chilled water, CF8 is adequate and more economical.

Screen & Mesh Selection Guide

The screen mesh size determines the minimum particle size that the strainer will capture. Selecting the correct mesh size is a balance between particle protection for downstream equipment and acceptable pressure drop and cleaning frequency. Too coarse a mesh allows damaging particles through; too fine a mesh causes excessive pressure drop and requires very frequent cleaning. The following table provides the standard mesh options with typical opening sizes and recommended applications:

Mesh Size	Approx. Opening	Best For	Pressure Drop (Clean)
10 Mesh	2.0 mm	Coarse debris removal — large particle protection — gas and steam service where large rust flakes and scale are the primary concern	Low — 0.1–0.2 bar
20 Mesh	0.85 mm	✓ Standard for steam and gas service — removes pipe scale, welding slag, and large debris — low blockage rate — recommended default for steam lines	Low — 0.2–0.3 bar
40 Mesh	0.42 mm	✓ Standard for liquid service — centrifugal pump protection on water service — removes rust, sand, and general pipe debris — most common mesh for process piping	Moderate — 0.3–0.5 bar
80 Mesh	0.18 mm	Fine filtration — spray nozzles, metering pumps, control valve protection — chemical injection lines — blocks faster than 40 mesh	Higher — 0.5–0.8 bar
100 Mesh	0.15 mm	Very fine filtration — pharmaceutical, food-grade, and specialty chemical — high debris load service requires frequent cleaning	High — 0.8–1.2 bar

💡 Mesh Selection Rule

For steam and gas service: specify 20 mesh — removes pipe scale and welding slag without excessive pressure drop. For liquid service with pump protection: specify 40 mesh — the standard Indian process plant specification that balances particle removal with manageable cleaning frequency. For fine spray nozzles or metering pumps: specify 80 mesh. Never specify finer than 40 mesh as the first strainer in a new pipeline — use 40 mesh for initial commissioning, then upgrade to finer mesh after the pipeline has been flushed and the debris load has stabilised.

Technical Specifications

Parameter	Specification
Product	Y Strainer — Flanged End
Body Material	WCB (ASTM A216) / CF8 SS304 (ASTM A351) / CF8M SS316 (ASTM A351)
Screen Material	SS304 / SS316 Perforated or Wire Mesh
Screen Mesh Options	10 / 20 / 40 / 80 / 100 Mesh (standard: 20 mesh for steam, 40 mesh for liquid)
End Connection	Flanged — ASME B16.5 Class 150 Raised Face (RF)
Size Range	DN25 (1″) to DN300 (12″)
Pressure Rating	ASME Class 150 (approximately PN20 / 285 psi at ambient)
Temperature Range	-29°C to +425°C (WCB) / -196°C to +816°C (CF8/CF8M)
Body Configuration	Y-pattern — screen pocket at 45° angle to pipeline axis
Cap Type	Threaded plug cap or flanged cap — for screen removal and cleaning
Testing Standard	API 598 — hydrostatic shell test
Design Standard	ASME B16.34 / ASME B16.5
MOQ	10 Nos per size per body material
HSN Code	84818090

Standard Dimensions — DN25 to DN300

Size (DN)	NPS (inch)	Face-to-Face (mm)	Flange OD (mm)	Flange Bolt Circle (mm)	Bolt Holes x Size
DN25	1″	140	108	79.4	4 x 16mm
DN32	1.25″	165	117	88.9	4 x 16mm
DN40	1.5″	178	127	98.4	4 x 16mm
DN50	2″	203	152	120.6	4 x 20mm
DN65	2.5″	222	178	139.7	4 x 20mm
DN80	3″	241	191	152.4	4 x 20mm
DN100	4″	292	229	190.5	8 x 20mm
DN150	6″	356	279	241.3	8 x 22mm
DN200	8″	419	343	298.5	8 x 22mm
DN250	10″	457	406	362.0	12 x 26mm
DN300	12″	502	483	431.8	12 x 26mm

⚠ Dimension Note

Dimensions above are reference values per ASME B16.5 Class 150 flanged Y strainers. Face-to-face dimension varies by manufacturer. Always verify actual face-to-face dimension with KELOR before finalizing pipe spool drawings. Flange drilling per ASME B16.5 Class 150 is standardised and will match pipeline flanges of the same class.

Installation Orientation Guidelines

Correct installation orientation of a Y strainer is critical for proper straining performance and efficient cleaning. The screen pocket must be positioned to use gravity for debris collection. Incorrect orientation is the most common installation mistake and results in poor straining efficiency, uneven screen loading, and difficult cleaning:

Pipeline Orientation	Correct Pocket Position	Reason
Horizontal Pipeline	6 o’clock — pocket pointing straight down	Gravity collects debris at the bottom of the screen — maximum screen utilisation — drain plug allows flushing without removing screen. This is the most important installation rule.
Vertical Upward Flow	3 o’clock or 9 o’clock — pocket pointing sideways	Debris falls into the pocket by gravity while flow passes upward through the screen. Never point pocket up in vertical flow — debris falls away from the screen.
Vertical Downward Flow	6 o’clock — pocket pointing straight down	Debris falls into the pocket by gravity and flow assists in cleaning. This is the ideal vertical orientation.
Steam Lines	Always 6 o’clock — pocket straight down	Condensate drains into the pocket by gravity and is not carried into the steam system where it causes water hammer. Critical for steam service.

Applications in Indian Industries

Steam Systems

WCB body — 20 mesh screen — DN25–DN150 — installed upstream of steam traps, pressure reducing stations, and control valves — removes pipe scale and rust flakes that damage valve seats and trap internals. Pocket must point down for condensate drainage. Most common application for Class 150 flanged Y strainers in Indian process plants.

Centrifugal Pump Protection

WCB or CF8M body — 40 mesh screen — DN50–DN200 — installed on pump suction line — removes sand, rust, and debris that damage pump impellers and mechanical seals. CF8M for cooling water with chlorine biocide. Critical for pump reliability and reduced maintenance downtime.

Water Treatment

CF8 or CF8M body — 40 mesh screen — DN50–DN300 — raw water, DM water, and treated water piping — protects flow meters, control valves, and heat exchangers from sand, silt, and pipe debris. CF8M for seawater or chloride-containing raw water.

Chemical & Petrochemical

CF8M body — 20 or 40 mesh screen — DN25–DN200 — process piping protection for control valves, flow meters, and injection nozzles — handles corrosive chemicals and chloride-containing process fluids. Hastelloy screen available for aggressive acid service.

Oil & Gas

WCB body — 20 mesh screen — DN25–DN200 — fuel oil, lube oil, natural gas, and compressed air piping — removes pipe scale, welding slag, and rust. Installed upstream of burners, compressors, and metering stations.

HVAC Systems

CF8 body — 20 mesh screen — DN50–DN200 — chilled water, condenser water, and hot water piping — protects chillers, heat exchangers, control valves, and balancing valves. CF8M for cooling tower water with chlorine biocide treatment.

Pharmaceutical Process

CF8M body — 40 or 80 mesh screen — DN25–DN100 — WFI, purified water, and process chemical piping — protects metering pumps, spray nozzles, and filling equipment. Electro-polished internal surface available for GMP compliance.

Food & Beverage

CF8M body — 40 mesh SS316 screen — DN25–DN100 — product transfer lines, CIP systems, ingredient dosing — prevents contamination from pipe debris. Sanitary end connections available on request for food GMP applications.

Y Strainer vs Basket Strainer — When to Specify

Feature	Y Strainer	Basket (T-Type) Strainer
Debris Capacity	Moderate — screen area limited by Y-body diameter — suitable for moderate debris load	High — basket has larger surface area — holds more debris before cleaning required
Pressure Drop (Clean)	0.2–0.5 bar (40 mesh) — higher per unit screen area due to compact body	0.1–0.3 bar — lower per unit screen area due to larger basket surface
Space Requirement	Compact — fits in standard pipe spacing — no extra headroom	Larger — requires top removal space for basket extraction
Cleaning	Shut down, remove cap, extract screen — system must be isolated	Same — or duplex type allows switching without shutdown
Best Pipe Size	DN25 to DN150 (most common) — DN200 to DN300 available	DN50 to DN600+ — larger sizes where Y strainer capacity is insufficient
Cost	✓ Lower — standard for most process piping strainer applications	Higher — justified for high debris load, large size, or duplex requirements
Specify When	Standard horizontal process piping — steam, oil, gas, water, chemical — moderate debris load — compact installation space	High debris load — DN150+ water service — continuous operation (duplex) — vertical upward flow

Why Choose KELOR for Y Strainers?

🛠

Verified Vendor Partners

All Y strainers sourced from quality-assured vendor partners conforming to ASME B16.5, API 598, and ASTM material standards. Mill Test Report 3.1 can be provided on request from verified vendors.

📦

Consolidated Project BOM

Single supplier for strainers + valves + flanges + stud bolts — one GST invoice, one dispatch, one point of contact. WCB, CF8, and CF8M in multiple sizes on a single order.

💰

Competitive Pricing

Bulk project pricing for EPC contractors and turnkey projects. Transparent quotation with size-wise and material-wise breakdown. No hidden charges.

📄

Full Documentation

API 598 hydrostatic test certificate, material certificates per EN 10204 3.1 (on request), GST invoice, and packing list. MTC for WCB (A216), CF8 (A351), CF8M (A351) available.

🚚

Pan India Dispatch

Reliable delivery to Mumbai, Pune, Chennai, Bengaluru, Hyderabad, Delhi NCR, Surat, Vadodara, Ankleshwar, Vapi, Dahej, and all other industrial cities via established logistics networks.

📞

Technical Support

Pre-sales assistance for body material selection, mesh size specification, screen material, and installation orientation guidance. Response within 24 hours on all enquiries.

Commercial Information

💳 Ordering & Delivery

Price BasisOn request — size, material, mesh dependent

Payment TermsAdvance Payment

DeliveryReady stock for standard sizes / project lead time

MOQ10 Nos per size per body material

GSTIN24AKLPP6499B1ZT

GST InvoiceProvided with every order

Flanged BoltingA193 B7 stud bolts + 2H nuts available

PackagingIndustrial standard packing for transport

B2B Buying Checklist — Y Strainer Flanged Class 150

Confirm body material: WCB (steam, oil, gas, general water) / CF8 (non-chloride corrosive) / CF8M (chloride, seawater, chemical)
Specify size (DN) — must match pipeline size and flange class
Specify mesh size: 20 mesh (steam/gas), 40 mesh (liquid, pump protection), 80 mesh (fine filtration, nozzles)
Confirm end connection: Flanged ASME B16.5 Class 150 RF — verify flange drilling matches pipeline flanges
Specify screen material: SS304 standard / SS316 for corrosive or chloride service
Request API 598 hydrostatic test certificate and Mill Test Report 3.1 at order stage
If ordering flanged bolting together: specify A193 B7 stud bolts with A194 2H nuts per flange size
Consolidate multiple sizes and body materials on a single order for project BOM efficiency

Applicable Standards

📋 Standards & Compliance

ASME B16.5 — Pipe Flanges and Flanged Fittings — Class 150 raised face dimensions, pressure-temperature ratings, and flange drilling for flanged Y strainer end connections.

ASME B16.34 — Valves — Flanged, Threaded, and Welding End — pressure-temperature ratings, shell thickness, and wall thickness requirements for strainer body design.

API 598 — Valve Inspection and Testing — hydrostatic shell test at 1.5x rated pressure applied to Y strainers. Test certificate provided with every order.

ASTM A216 WCB / A351 CF8 / CF8M — Material specifications for carbon steel and stainless steel castings used for Y strainer body. Material test certificates per EN 10204 3.1 can be provided on request from verified vendors.

Frequently Asked Questions

Which way should a Y strainer be installed in a horizontal pipeline?

In a horizontal pipeline, the Y strainer screen pocket (the lower leg of the Y) must point straight down — at the 6 o’clock position. This is the most important installation requirement and the most commonly violated. With pocket pointing down, gravity continuously collects debris at the bottom of the screen — maximum screen utilisation — and the drain plug at the bottom of the cap allows flushing collected debris without removing the screen. If the pocket points up, debris collects in the pipeline flow path, the screen fills unevenly, and cleaning is messier. For steam lines especially, pocket must point down so condensate drains into the pocket and is not carried into the steam system where it causes water hammer.

What mesh size should I specify for a centrifugal pump protection strainer on water service?

Specify 40 mesh (approximately 420 micron / 0.42mm opening) for centrifugal pump protection on water service. 40 mesh removes rust flakes, scale, sand, and general pipe debris that damages pump impellers and mechanical seals without creating excessive pressure drop across a clean strainer. 20 mesh is too coarse for pump protection — it passes particles that damage pump internals. 80 or 100 mesh is too fine for general water service — it blocks quickly under normal pipe debris load and requires very frequent cleaning. 40 mesh is the standard Indian process plant specification for water service pump protection Y strainers.

When should I use a basket strainer instead of a Y strainer?

Specify basket (T-type) strainer when: the debris load in the pipeline is high and the Y strainer screen fills quickly requiring very frequent cleaning; the pipe size is DN150 or larger on water service where the basket’s larger screen area is needed; continuous operation without any shutdown for cleaning is required (duplex basket strainer — one basket in service while the other is being cleaned); the pipeline is vertical upward flow where a Y strainer is less effective. Specify Y strainer for standard horizontal process piping on steam, oil, gas, and general liquid service where debris load is moderate and the compact Y-body fits the available space.

What is the difference between CF8 and CF8M body for a Y strainer?

CF8 is the ASTM A351 casting grade equivalent to SS304 — 18% chromium, 8% nickel, no molybdenum. CF8M is equivalent to SS316 — same Cr-Ni base plus 2–3% molybdenum. The molybdenum in CF8M provides resistance to chloride pitting and crevice corrosion that CF8 does not have. Specify CF8 for non-chloride service — DM water, mild chemical, HVAC chilled water, food non-chloride. Specify CF8M for chloride-containing service — seawater, chemically treated water above 150 ppm chloride, coastal industrial, chemical plant, and pharmaceutical process. If the strainer will be exposed to biocide-treated cooling water with chlorine-based chemicals, specify CF8M — CF8 pits at the chloride concentration typical of treated Indian HVAC cooling water systems.

What is the MOQ and documentation provided for Y strainers?

MOQ is 10 Nos per size per body material. Project BOM orders mixing WCB and CF8M in multiple sizes are supplied together with one GST invoice (GSTIN: 24AKLPP6499B1ZT). API 598 hydrostatic test certificate provided with every order. Mill Test Report 3.1 can be provided on request from verified vendors for project QA documentation. Specify mesh size (20 / 40 mesh recommended) at order stage — standard is 20 mesh for steam/gas, 40 mesh for liquid service. WhatsApp body material, size, mesh, and quantity for pricing within 2 hours.

Can Y strainers be installed in vertical pipelines?

Yes — but with specific orientation rules. In a vertical upward-flow pipeline, the Y strainer screen pocket must point sideways (3 o’clock or 9 o’clock position) so that debris collects against the screen by gravity while flow passes upward. In a vertical downward-flow pipeline, the pocket can point down (6 o’clock) which is the standard orientation — debris falls into the pocket by gravity and flow assists cleaning. Never install a Y strainer with the pocket pointing up in any orientation — debris falls away from the screen and straining efficiency drops dramatically.

What pressure drop can I expect across a Y strainer?

A clean Y strainer with standard 20 mesh or 40 mesh screen typically produces a pressure drop of 0.2 to 0.5 bar at rated flow velocity depending on pipe size and body configuration. As debris accumulates on the screen, pressure drop increases progressively. When pressure drop reaches 1.0 to 1.5 bar (or as specified by the process engineer), the strainer screen must be cleaned. For pump suction strainers, maximum differential pressure should be limited to avoid pump NPSH problems — monitor differential pressure across the strainer during operation and establish a cleaning schedule based on actual debris loading rate.

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Krishna Industries (KELOR) supplies Y Strainers with Flanged End Class 150 from Ahmedabad, Gujarat, serving steam systems, water treatment, chemical process, HVAC, oil and gas, pharmaceutical, and food processing industries across India. With body material options of WCB (ASTM A216) for general service, CF8 (SS304) for non-chloride corrosive service, and CF8M (SS316) for chloride and aggressive chemical service, sizes from DN25 to DN300, mesh options from 10 to 100 mesh, and full documentation support including API 598 test certificates and Mill Test Report 3.1 on request from verified vendors, KELOR provides reliable project supply for EPC contractors, process engineers, and B2B buyers. Pan India dispatch to all major industrial cities.