single chamber orifice fitting

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WHM Single Chamber (Simplex, Junior) Orifice Fitting

As an orifice plate holding device, orifice fitting can house and accurately position an orifice plate within a pipe or tube to measure fluid flow. It is just one component in a flow measurement system

  • To prevent liquid or gas leakage, and do not require the flange to be widened for orifice plate inspection and replacement
  • Maintenance by replacing orifice plates, maximize uptime without removing connections in the pipeline
  • Confirm to API MPMS 14.3.2 /AGA No. 3, ISO 5167-2 recommendations and in accordance with ASME and ASTM specifications
  • Hydrostatic test at least 1.5 times CWP (API Std 598 )
  • Major parts can be interchanged with international brand products
Single Chamber Orifice Fitting

Features & Benefits:

  • Field repairable
  • Special trim available
  • Pressure Ratings: Class 150-1500
  • Available sizes: 2” to 6”
  • Orifice plate and seal are not included in all units

Applications:

  • Oil & Gas transmission
  • Oil & Gas Pipeline
  • Oil & Gas distribution
  • Offshore Oil & Gas production i.e. FPSO’s
  • Oil & Gas plants
'Single-Chamber-Orifice-Fitting-Assembly1

WHM has 3 series Single Chamber Orifice Fitting based on seat gap width and the quantity of pressure tap per side.

D series with Seat Gap width 11/16" and 2 pairs of pressure taps

E series with Seat Gap width 9/16" and 4 pairs of pressure taps

F series with Seat Gap width 11/16" and 4 pairs of pressure taps

WHM Standard products D , E & F series are compared in the following table.

Mode D series E series F series
Seat Gap width 11/16" (17.4mm) 9/16" (14.3mm) 11/16" (17.4mm)
QTY of pressure taps 2 pairs 2 pairs 2 pairs
Telemetering tap N/A 2 pairs 2 pairs
Ring holder Plain bore Notched bore Plain bore
Seal ring Edge seal rings (old style) New style 14.3 Edge seal rings (old style)
NPS 2"/3"/4" 2"/3" 2"/3"/4"/6”/8”
SCH 40/80 40/80 40/80
Connection Raised Flange neck (F-W or FN)
Weld neck (W-W Or WN)
Raised Flange neck (F-W or FN)
Weld neck (W-W Or WN)
Raised Flange neck (F-W or FN)
Weld neck (W-W Or WN)
Manufacture Process Investment casting + CNC center Investment casting + CNC center Investment casting + CNC center
Purchasing process Sample(1-3) then big lot Sample(1-3) then big lot Sample(1-3) then big lot
Body Material (Standard)  ASME SA 216 WCC / WCB ASME SA-216 WCC / WCB ASME SA-216 WCC / WCB
Trim Material Carbon steel Carbon steel / Stainless Steel Carbon steel / Stainless Steel
Specification API 14.3/AGA No.3
ISO 5167
GB/T 21446
ASME B16.34
ASME B16.5
API 14.3/AGA No.3
ISO 5167
GB/T 21446
ASME B16.34
ASME B16.5
API 14.3/AGA No.3
ISO 5167
GB/T 21446
ASME B16.34
ASME B16.5
Pressure rating (ASME Class) 600 600 600

If you need special orifice fittings, we can customize for you.

Measuring type Differential Pressure
Fluid type Liquid, gas, standard medium, sweet corrosion medium,
acid medium, low temperature
Uncertainty of displacement coefficient Conform to AGA 3/API 14.3 or ISO 5167-2 or the others
Orifice meter size 2”- 12”
Pressure rating ANSI Class 150-2500
Process temperature range -20°F-160°F
Flange type ANSI RF, ANSI RTJ etc.
Material Carbon steel(WCB /LCC),  Alloy steel WC6 WC9,
CF8/CF8M/CF3M, Duplex Stainless Steel

Single Chamber orifice components

WHM Supplies all components for different type of single orifice fittings.

Single-Chamber-orifice-components

Single Chamber Orifice fitting Body

Material:
ASME SA216 Gr WCB WCC
ASME SA 217 Gr WC6 WC9
ASME SA 352 Gr LCC
Process: Investment casting for 2”-6”, Sand Casing for 8” machined
MOQ: 50
Single Chamber Orifice fitting Body

Clamping bar

Size: 2”/3”/4”/6”/8”
Material: stainless steel 304/316 or carbon steel 1020 ZP
Process: Plate machined
MOQ: 100

Clamping bar screw and Plug Thread

Material: stainless steel 304/316 or alloy steel ZP and ASME SA 105 / 1020 Carbon steel ZP
Process: Barstock or forge machined
MOQ: 500

Sealing bar

Size: 2”/3”/4”/6”/8”
Material: carbon steel 1020 ZP or stainless steel 304/316
Process: Plate machined
MOQ: 100

Sealing bar

Plate carrier / Ring holder (Investment casting steel)

Size: 2”/3”/4”/6”/8”
Material: alloy steel ANSI 4130 / 4140 ZP or stainless steel ASME SA351 CF8M
Process: Investment casting machined
MOQ: 50

Plate carrier

If you need special castings...

If you need special castings, forgings and deep processing services, please provide us drawings, samples and detailed requirement. For assistance, please contact us through E-mail info@whmcn.com or call us at +86-21-6892 4569.

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