Forged steel gate, globe and check valves for small-bore lines
Forged gate, globe and check valves to API 602 in A105, LF2, F11/F22, F316 and F51, ¼" to 2".
Overview
Small-bore lines, vents, drains, instrument take-offs and sampling connections use compact forged steel valves rather than cast valves. They are lighter, stronger for their size and available in Class 800, 1500 and 2500 to match high-pressure headers.
AM Enterprises stocks forged gate, globe and lift check valves to API 602 from Italian and American manufacturers found on most approved vendor lists in Pakistan. Bolted-bonnet and welded-bonnet designs are available, with socket weld, NPT, butt weld and flanged ends, and with extended bodies for insulated and cryogenic lines.
Material coverage includes A105 carbon steel, LF2 for low temperature, F11 and F22 chrome-moly for high-temperature steam, F316 and F304 stainless, and F51 duplex for corrosive service, all with heat-traceable 3.1 certificates.
See how a gate valve works in the interactive Valve Lab.
Typical applications
- Instrument take-offs and root valves
- Vents, drains and sampling points
- High-pressure steam and boiler piping
- Fuel gas and lube oil systems
- Chemical injection lines
- Refinery and petrochemical small-bore piping
Specified in refineries, power & heavy industry, petrochemicals, oil & gas fields.
Specifications
| Types | Gate (solid or flexible wedge) · globe · lift check · piston check · ball check |
|---|---|
| Sizes | ¼" – 2" (DN8 – DN50); flanged to 2½" |
| Pressure classes | ASME 800 · 1500 · 2500 (and 150 / 300 / 600 flanged) |
| Body materials | A105 · A350 LF2 · A182 F11 / F22 / F5 / F9 · F304 / F316 / F316L · F51 duplex · F53 super duplex |
| Bonnet | Bolted bonnet · welded bonnet · pressure seal · extended body |
| Design standards | API 602 · ASME B16.34 · BS 5352 |
| Testing | API 598 · fire-safe API 607 on request |
| End connections | Socket weld (ASME B16.11) · NPT (ASME B1.20.1) · butt weld · RF flanged |
Sizes, classes and materials listed are typical of our stock and supply programme. Other combinations are quoted against your specification. See what is usually ex-stock.
Specifying the right forged steel valve
Small-bore valves 2" and below are forged, not cast: the forged body is denser, stronger and inspected more easily, and API 602 (harmonised with ISO 15761) governs gate, globe and check valves in this range. Class 800 is the default for most refinery and plant piping; Class 1500 and 2500 cover high-pressure steam, boiler blowdown and hydrogen service. Socket-weld ends are standard on process lines, threaded (NPT) ends on utility and instrument piping, and flanged ends where the valve must be removable. For lines between two different materials or where the specification calls for it, an extended body valve allows the weld to be made away from the valve.
Body grades follow the pipe: A105 for carbon steel, A350 LF2 for low temperature, A182 F11, F22, F5 and F9 for chrome-moly steam and hydrocarbon service, F304 and F316 for stainless lines. Choose bolted bonnet for ease of maintenance and welded bonnet where fugitive emissions or vibration rule out a gasketed joint. For sour service, request NACE MR0175 bodies and bolting; for hydrogen and high-temperature service, hard-faced trim with Stellite seats.
What to send us for a fast quote
- Size and class (800, 1500, 2500)
- Type: gate, globe, check (piston or ball)
- Body material grade and trim
- End connection: SW, NPT, flanged (RF/RTJ)
- Bonnet: bolted, welded, extended body
- Documents required
Why tenders get rejected, and how we avoid it
Forged valve line items on Pakistani tenders are long: hundreds of valves across several sizes, classes and grades. Evaluations stall when the bidder's data sheet does not match each line or the manufacturer's API 602 licence is missing. We respond line by line, with the manufacturer named per item, the licence and authorisation letter attached and partial offers accepted for the lines we hold in stock. More on API licences, authorisation letters and certificates.
Brands available
Supplied from the manufacturers below, through our sister company Al Hakim in Dubai. Country of origin is confirmed on the certificates of every supply.
Documentation supplied
EN 10204 3.1 material test certificate traceable to heat number, API 598 pressure test report per serial number, certificate of origin and manufacturer's certificate of conformity, with NACE, fire-safe, 3.2 and third-party inspection documents where the order requires them. What every document in our package covers.
Frequently asked questions
What does Class 800 mean?
Class 800 is an intermediate rating used for forged valves, between ASME Class 600 and 900. Its pressure-temperature ratings are defined in API 602 rather than in ASME B16.34.
Socket weld or threaded ends?
Socket weld ends are preferred for hydrocarbon and steam service because they eliminate thread leakage paths. NPT ends are common on utilities, instrument air and where the line may be dismantled.
Do you supply welded-bonnet forged valves?
Yes. Welded bonnet valves have no bonnet gasket and are used where fugitive emissions must be minimised, such as on hydrogen and hydrocarbon service.
Forged or cast: where is the dividing line?
Forged to API 602 at 2" and below (and sometimes to 4" in Class 1500 and 2500); cast to API 600, BS 1873 and API 594 above 2". Large sizes are cast because forging large bodies is uneconomic; small sizes are forged because the forging is stronger and cheaper.
Class 800: what does it mean?
An intermediate rating between Class 600 and Class 900 used only for forged small-bore valves. It corresponds to the pressure rating of a Class 600 flange body plus the margin available from the forged construction, and is the standard class on refinery piping.
Related products
Above 2", the equivalent cast valves are on our gate valves, globe valves and check valves pages; the matching forged fittings and flanges are on the pipe fittings and flanges pages.
Instrumentation valves
Needle valves, manifolds, monoflanges and double block and bleed, up to 10,000 psi, 316 SS to Inconel.
Sizes, classes and brands
Gate valves
Full-bore isolation with minimal pressure drop. API 600 cast steel and API 602 forged steel, 2" to 48".
Sizes, classes and brands
Globe valves
Stable throttling for steam, fuel and process lines. Cast and forged, ½" to 24".
Sizes, classes and brands
Pipe fittings
Butt-weld elbows, tees and reducers to B16.9; forged socket-weld and threaded fittings to B16.11.
Sizes, classes and brandsRequest a quotation for forged steel valves
Send size, class, material, quantity and required documents on WhatsApp or through the form. We reply within one working day with availability and lead time.