Email: [email protected]
Phone: +91 93135 43530
Address: 133/1 Ground, Mansuri Block, Opp. Dudheshwar Water Tank, Ahmedabad-380004, Gujarat, India
CF8M (SS316) Stainless Steel Valve Supplier India — Gate / Globe / Check — Flanged Class 150# | KELOR
Krishna Industries (KELOR), based in Ahmedabad, Gujarat, supplies CF8M (ASTM A351 SS316 equivalent) Gate Valves, Globe Valves, and Check Valves — flanged ASME B16.5 Class 150 raised face — DN15 (½″) to DN300 (12″) — full SS316 trim — API 598 pressure tested — chloride and chemical resistant — GST invoice — MOQ 10 Nos — Pan India dispatch from Ahmedabad.
Mill Test Report 3.1 can be provided on request from verified vendors — confirming ASTM A351 CF8M chemical composition (Cr 18–21%, Ni 9–12%, Mo 2–3%, C max 0.08%) and mechanical properties with heat number traceability. API 598 hydrostatic shell test and seat leakage test certificate provided with every order.
⚡ Quick Reference
SupplierKrishna Industries (KELOR) — Ahmedabad, Gujarat
MaterialASTM A351 CF8M (SS316 equivalent)
Valve TypesGate / Globe / Check Valve
End ConnectionFlanged ASME B16.5 Class 150 RF
Size RangeDN15 (½″) to DN300 (12″)
TrimFull SS316 (CF8M)
TestingAPI 598 — Shell + Seat Test
MOQ10 Nos per type per size
📜 On This Page
- Overview — CF8M SS316 Valves
- CF8M — What It Means & When to Specify
- Casting Grade Comparison — CF8M / CF8 / CF3M
- Valve Types Supplied — Gate / Globe / Check
- Common Specifications
- Applications in Indian Industries
- Why CF8M Over CF8 — The Molybdenum Advantage
- Why Choose KELOR
- Commercial Information
- Related Products
- Frequently Asked Questions
CF8M (SS316) Stainless Steel Valves — Overview
Krishna Industries (KELOR) supplies CF8M (ASTM A351) stainless steel valves in flanged Class 150 configuration across three valve types — Gate Valve for on/off isolation with full bore and near-zero pressure drop, Globe Valve for throttling and flow control with modulating capability, and Check Valve for automatic non-return (backflow prevention) service. All three valve types are available with CF8M body and full SS316 trim, flanged ASME B16.5 Class 150 raised face, and API 598 pressure testing.
CF8M is the ASTM A351 casting grade equivalent to wrought SS316 (AISI 316) — it contains 2–3% molybdenum in addition to the 18-8 chromium-nickel base. The molybdenum content provides resistance to chloride pitting and crevice corrosion that CF8 (SS304 equivalent) does not have. This makes CF8M the correct specification for corrosive chemical service, chloride-containing water, seawater, coastal industrial environments, pharmaceutical utilities, and food processing with chlorinated CIP chemicals. KELOR supplies these valves from verified vendor partners with full material documentation, API 598 test certificates, and Pan India dispatch from the Ahmedabad warehouse.
CF8M — What It Means & When to Specify
C = Corrosion Resistant Casting
F = Austenitic
8 = 18-8 Cr-Ni Base
M = Molybdenum (2–3% Mo)
The ASTM A351 CF8M designation is decoded as follows: C indicates corrosion-resistant casting, F indicates austenitic (face-centred cubic crystal structure), 8 indicates the base composition is 18% chromium – 8% nickel (the classic 18-8 austenitic stainless steel), and M indicates the addition of molybdenum (2–3%) to the base composition. The molybdenum content is the critical differentiator between CF8M and CF8 — it forms a stable molybdate passive film on the steel surface in chloride-containing environments, preventing the initiation and propagation of pitting corrosion that attacks CF8.
The Pitting Resistance Equivalent Number (PREN) quantifies this difference: CF8M has a PREN of approximately 24 (16.5% Cr + 2% Ni + 2.5% Mo) compared to CF8 at approximately 18 (18% Cr + 2% Ni + 0% Mo). A PREN above 23 is generally considered the threshold for chloride pitting resistance in seawater and coastal environments. This is why CF8M is the standard specification for Indian chemical plants at Ankleshwar, Vapi, and Dahej, coastal industrial facilities at Hazira and Mundra, and any application where the process fluid contains chlorides, biocide-treated cooling water, or aggressive chemicals.
Casting Grade Comparison — CF8M / CF8 / CF3M
| ASTM Casting Grade | Wrought Equivalent | Key Difference | Specify For | Not For |
|---|---|---|---|---|
| CF8M | SS316 (AISI 316) | 2–3% Mo — chloride pitting resistance — PREN ~24 | Corrosive chemical, chloride service, seawater, coastal industrial, pharma utilities, food CIP, general SS316 piping — the workhorse SS316 valve specification | Non-corrosive service where WCB cost is justified — extreme chemical where alloy or Hastelloy is needed |
| CF8 | SS304 (AISI 304) | No Mo — general corrosion resistance — PREN ~18 | Non-chloride service — DM water, mild chemical, HVAC chilled water, food non-chloride, general SS304 piping — more economical than CF8M | Chloride above 150 ppm, seawater, treated cooling water — CF8 pits in these services |
| CF3M | SS316L (AISI 316L) | Low carbon 0.03% max — sensitisation-free in welded piping | Pharma GMP welded piping — PW, WFI, clean steam — where USFDA/WHO GMP requires 316L — welded vessel nozzle connections | Non-welded flanged valve service — general chemical where CF8M is adequate and more economical |
📚 Selection Rule — CF8M vs CF3M
For flanged valve applications (bolted between flanges, not welded to piping), CF8M is the standard and correct specification. The welding sensitisation concern that drives CF3M selection does not apply to flanged connections. Specify CF3M only when the valve will be butt-welded to stainless steel piping and the process requires USFDA/WHO GMP low-carbon 316L compliance (pharma PW, WFI, clean steam). For all other CF8M flanged valve requirements, the standard CF8M casting grade provides the full corrosion resistance of SS316 at lower cost than CF3M.
Valve Types Supplied — Gate / Globe / Check
KELOR supplies CF8M (SS316) valves in flanged Class 150 across three fundamental valve types. Each type serves a distinct function in the piping system — understanding the functional difference is essential for correct specification:
| Valve Type | Function | Operation | Pressure Drop | Typical CF8M Application |
|---|---|---|---|---|
| Gate Valve | On/off isolation — full bore open — not for throttling | Multi-turn (handwheel) — rising stem — infrequent operation | Near-zero when fully open — full bore matches pipe diameter | Main line isolation on corrosive chemical process lines — SS flanged piping block valves — coastal industrial pipeline isolation where full bore and low pressure drop is required |
| Globe Valve | Throttling and flow control — modulating — not for infrequent on/off | Multi-turn (handwheel) — rising stem — designed for partial open | Higher than gate or ball valve — fluid changes direction through seat — acceptable for flow regulation | Chemical dosing rate control — DM water flow regulation — pharma utility flow adjustment — cooling water bypass control — any application requiring flow rate adjustment |
| Check Valve | Non-return (NRV) — prevents backflow automatically — no operator | Automatic — disc opens under forward flow, closes on reverse flow — no handwheel | Moderate — depends on type (swing, dual plate, piston) — minimum forward flow pressure required to open | Pump discharge backflow prevention on corrosive chemical and SS piping — SS pipeline non-return service — pharma utility pump protection — heat exchanger protection |
💡 Valve Type Selection Quick Guide
Need simple on/off isolation? → Gate valve — full bore, low pressure drop, economical for infrequent operation. Need flow rate adjustment? → Globe valve — designed for throttling, provides precise flow control. Need to prevent reverse flow? → Check valve — automatic non-return, protects pumps and equipment. On many CF8M process piping BOMs, all three valve types appear together — gate valve for isolation, globe valve for control, check valve for pump protection. KELOR supplies mixed-type consolidated orders with one GST invoice.
Common Specifications — CF8M Flanged Class 150#
| Parameter | Specification |
|---|---|
| Body Material | ASTM A351 CF8M (SS316 equivalent casting) |
| Trim Material | CF8M — full SS316 trim (disc, seat, stem) |
| End Connection | Flanged ASME B16.5 Class 150 — Raised Face (RF) standard |
| Size Range | DN15 (½″) to DN300 (12″) — size range varies by valve type |
| Pressure Rating | Class 150# (ASME B16.5) — approximately 19 bar at ambient for CF8M |
| Temperature Range | -196°C to +816°C (CF8M — cryogenic to high temperature) |
| Design Standards | Gate: API 600 / BS 1414 — Globe: BS 1873 / API 602 — Check: API 594 / BS 5153 |
| Testing Standard | API 598 — hydrostatic shell test + seat leakage test |
| Material Certification | Mill Test Report 3.1 can be provided on request from verified vendors — ASTM A351 CF8M heat certificate with chemical composition and mechanical properties |
| MOQ | 10 Nos per valve type per size |
| HSN Code | 84818090 (gate/globe) / 84813090 (check valve) |
Applications in Indian Industries
Chemical Plants — Ankleshwar, Vapi, Dahej
CF8M body resists chloride, acid, and alkali service where CF8 (SS304) pits — flanged Class 150 matches most Indian chemical plant utility piping class — gate valve for isolation, globe valve for flow control, check valve for pump protection on corrosive chemical process lines.
Pharmaceutical Utilities
CF8M specified for non-GMP welded utility piping where SS316 is the project material — PW distribution, cooling water, process utilities — gate valve for isolation, globe valve for flow regulation, check valve for pump discharge protection on pharma utility piping.
Coastal & Offshore Industrial
CF8M molybdenum content resists seawater and salt air corrosion — coastal Gujarat industrial plants at Dahej, Hazira, and Mundra where SS304 pitting in chloride environment is a documented maintenance problem — gate valves for pipeline isolation, check valves for pump protection.
Food Processing — Chlorinated CIP Service
CF8M resists chlorinated CIP chemicals (peracetic acid, sodium hypochlorite) that attack CF8 — gate and globe valves on CIP supply and return lines — SS316 body withstands repeated exposure to oxidising chlorine-based cleaning chemicals without pitting.
Why CF8M Over CF8 — The Molybdenum Advantage
The decision between CF8M (SS316) and CF8 (SS304) for valve body material is one of the most common material selection decisions in industrial piping. The molybdenum content in CF8M provides a measurable and well-documented advantage in chloride-containing environments. Understanding when this advantage justifies the additional material cost is essential for correct valve specification:
| Service Condition | CF8M (SS316) — Correct | CF8 (SS304) — Acceptable |
|---|---|---|
| Seawater / saltwater | ✓ Molybdenum resists chloride pitting — standard for marine and coastal service | ✗ Pits rapidly — not acceptable for seawater |
| Chloride > 150 ppm | ✓ PREN ~24 provides pitting resistance | ✗ PREN ~18 — pitting initiates above 150 ppm chloride |
| Biocide-treated cooling water | ✓ Resists chlorine-based biocide attack | ✗ CF8 pits in chlorinated Indian HVAC cooling water systems |
| Coastal atmosphere | ✓ Salt spray resistance for coastal plant installations | ✗ Pitting documented in coastal Gujarat industrial plants |
| Acid / alkali chemical | ✓ Broader chemical resistance than CF8 | Acceptable for mild acid and alkali only — limited range |
| DM water / non-chloride | ✓ Excellent — but higher cost than needed | ✓ Adequate and more economical — correct specification |
Why Choose KELOR for CF8M Valves?
🛠
Verified Vendor Partners
All CF8M valves sourced from quality-assured vendor partners conforming to ASTM A351 and API standards. Mill Test Report 3.1 can be provided on request from verified vendors with heat number traceability.
📦
Consolidated BOM Supply
Gate + globe + check valves on a single consolidated order with one GST invoice. Mixed sizes, mixed valve types — one point of contact, one shipment.
💰
Competitive Project Pricing
Bulk pricing for EPC contractors and turnkey projects. Transparent quotation with valve-type-wise and size-wise breakdown. Discount on 100+ piece orders.
📄
Full Documentation
API 598 hydrostatic test certificate, Mill Test Report 3.1 (on request), chemical composition and mechanical properties certificate, GST invoice, packing list provided.
🚚
Pan India Dispatch
Reliable delivery to chemical hubs (Ankleshwar, Vapi, Dahej), pharma centres (Hyderabad, Bengaluru, Ahmedabad), and coastal industrial plants (Hazira, Mundra).
📞
Technical Support
Pre-sales material selection assistance — CF8M vs CF8 vs CF3M guidance — valve type selection for your application. Response within 24 hours.
Commercial Information
💳 Ordering & Delivery
Established2017
GSTIN24AKLPP6499B1ZT
IECAKLPP6499B
MOQ10 Nos per type per size
Payment TermsAdvance Payment
DeliveryReady stock / project lead time
GST InvoiceProvided with every order
PackagingIndustrial standard packing for transport
B2B Buying Checklist — CF8M Flanged Class 150 Valve
- Confirm valve type: Gate (on/off isolation) / Globe (flow control) / Check (non-return) — specify correct type for each piping location
- Confirm body material: CF8M (SS316 standard) / CF3M (SS316L for pharma GMP welded) — verify chloride content and GMP requirements
- Specify size (DN) and pressure class (Class 150) — must match pipeline specification and flange rating
- Confirm end connection: Flanged ASME B16.5 Class 150 RF — verify flange drilling matches pipeline flanges
- Specify trim material: Full CF8M trim (standard for CF8M body) — confirm disc, seat ring, stem, and backseat material
- Request API 598 test certificate and Mill Test Report 3.1 at order stage for project QA documentation
- Consolidate gate + globe + check valves on single order for project BOM efficiency — one GST invoice
- WhatsApp complete BOM: valve type, size, quantity per line item for consolidated pricing within 2 hours
Applicable Standards
📋 Standards & Compliance
ASTM A351 — Standard Specification for Austenitic Steel Castings for Pressure-Containing Parts — defines CF8M chemical composition, mechanical properties, and heat treatment requirements.
ASME B16.5 — Pipe Flanges and Flanged Fittings — Class 150 raised face dimensions, pressure-temperature ratings, and flange drilling for flanged valve end connections.
API 600 / BS 1414 — Steel Gate Valves — design, construction, and face-to-face dimensions for flanged gate valves.
BS 1873 — Steel Globe Valves — design and face-to-face dimensions for globe valves.
API 594 / BS 5153 — Check Valves — design and testing requirements for swing, dual plate, and piston check valves.
API 598 — Valve Inspection and Testing — hydrostatic shell test at 1.5x rated pressure, seat leakage test at 1.1x rated pressure.
Related Products
Frequently Asked Questions
What is CF8M and how does it differ from CF8?
CF8M is the ASTM A351 casting grade equivalent to SS316 — it contains 2–3% molybdenum added to the 18-8 chromium-nickel base. The molybdenum provides chloride pitting resistance that CF8 (SS304 casting equivalent) does not have. Specify CF8M wherever chloride-containing media, seawater, or aggressive chemical service requires the higher corrosion resistance of SS316. Specify CF8 for non-chloride service where the lower cost of SS304 equivalent is acceptable.
Can I order gate, globe, and check valves together in one order?
Yes — Krishna Industries supplies mixed valve type orders in one consolidated shipment with one GST invoice. WhatsApp your BOM listing valve type (gate / globe / check), size, and quantity per line item for consolidated project pricing within 2 hours.
What documentation is provided for CF8M valves?
API 598 hydrostatic test certificate is provided with every order. Mill Test Report 3.1 can be provided on request from verified vendors, confirming ASTM A351 CF8M with chemical composition (chromium 18–21%, nickel 9–12%, molybdenum 2–3%, carbon max 0.08%) and mechanical properties with heat number traceability. This is the document specifying authorities and QA teams request to verify CF8M material compliance.
What is the MOQ for CF8M valves?
MOQ is 10 Nos per valve type per size. Mixed BOM orders across gate, globe, and check valves are welcome — each line item has its own 10 Nos MOQ. WhatsApp valve type, size list, and quantity for pricing within 2 hours.
Why is CF8M specified instead of CF8 for coastal and offshore industrial plants?
Coastal and offshore environments have high atmospheric chloride concentration from salt spray and humidity. CF8 (SS304) lacks molybdenum and is susceptible to pitting corrosion in chloride environments — pitting initiates at surface defects and can penetrate the wall thickness, causing leaks. CF8M (SS316) with 2–3% molybdenum has a Pitting Resistance Equivalent Number (PREN) of approximately 24 compared to 18 for CF8, providing significantly longer service life in coastal Gujarat industrial plants at Dahej, Hazira, and Mundra where SS304 pitting is a documented maintenance problem.
What is the difference between CF8M and CF3M?
CF8M is ASTM A351 casting grade equivalent to SS316 — carbon max 0.08%, 2–3% molybdenum. CF3M is equivalent to SS316L — carbon max 0.03%, same 2–3% molybdenum. The lower carbon in CF3M prevents sensitisation (grain boundary chromium depletion) when welded to piping. For pharma GMP welded piping (PW, WFI, clean steam) where USFDA and WHO GMP require low-carbon 316L, specify CF3M. For non-welded flanged valve applications or general chemical service where welding sensitisation is not a concern, CF8M is the standard and more economical specification.
Need a Quote for CF8M (SS316) Gate / Globe / Check Valves?
WhatsApp your BOM — valve type, size, quantity — consolidated project pricing within 2 hours
💬 WhatsApp for Bulk Price ✉ Send Email RFQ🔗 Related Pages & Resources
Gate Valve Guide CF8M Y Strainer Wafer Check Valve (NRV) SS304 Butterfly Valve Stainless Steel Grades for Valves Valve Symbols P&ID Guide Pressure Relief Valve Guide 📷 Instagram — @kelorvalves 👥 LinkedIn — Krishna Industries (KELOR)Krishna Industries (KELOR) supplies CF8M (ASTM A351 SS316 equivalent) Gate Valves, Globe Valves, and Check Valves in flanged ASME B16.5 Class 150 for corrosive chemical, pharmaceutical, food processing, coastal industrial, and process plant applications across India. With full SS316 trim, API 598 pressure testing, material documentation support including Mill Test Report 3.1 on request from verified vendors, consolidated BOM ordering for mixed valve types, and Pan India dispatch from the Ahmedabad warehouse, KELOR provides reliable project supply for EPC contractors, process engineers, and B2B buyers.