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Home ProductsOrifice Flange

1/2" - 48" Forged Steel Flanges Hastelloy Alloy B3 ASME B16.5 2500 Class PN40

China BoYue Industrial (Shanghai)Co., Ltd. certification
China BoYue Industrial (Shanghai)Co., Ltd. certification
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1/2" - 48" Forged Steel Flanges Hastelloy Alloy B3 ASME B16.5 2500 Class PN40

1/2" - 48" Forged Steel Flanges Hastelloy Alloy B3 ASME B16.5 2500 Class PN40
1/2" - 48" Forged Steel Flanges Hastelloy Alloy B3 ASME B16.5 2500 Class PN40 1/2" - 48" Forged Steel Flanges Hastelloy Alloy B3 ASME B16.5 2500 Class PN40 1/2" - 48" Forged Steel Flanges Hastelloy Alloy B3 ASME B16.5 2500 Class PN40

Large Image :  1/2" - 48" Forged Steel Flanges Hastelloy Alloy B3 ASME B16.5 2500 Class PN40

Product Details:

Place of Origin: China
Brand Name: BoYue
Certification: ISO,BV,SGS
Model Number: BYOF00019

Payment & Shipping Terms:

Minimum Order Quantity: 1 pcs
Price: Negotiable
Delivery Time: 10-100 days depending on quantity
Payment Terms: L/C, T/T, Western Union
Supply Ability: 40000pcs per month
Detailed Product Description
CLASS RATING: 150#300#600#900#1500#2500# SEALING FACE: RF FF RTJ
High Light:

orifice plate flange


jack bolt flange

UNS N10675 Orifice Flange Hastelloy Alloy B3 ASME B16.5 2500 Class PN40 Forged Size 1/2'-48'





Carbon Steel:


Flanges:-ASTM A105/105N; A36; A694 F42-F70; A350 LF1/LF2; P235GH; P245GH; P250GH; P265GH; P280GH; ST37.2; S235JR; C22.8; CT20; CT3; SS400; SF390A; SF440A;
Pipe Fittings: ASTM A234 WPB; ST35.8; P265GH; JIS G3452; SS400; CT20; 09T2C;


Stainless Steel:


Flanges: ASTM A182 F304/304L; F316/316L; F321; F51; 12X18H10T; 10X17H13M2T; SUS F304/F304L; F316/F316L; 1.4301;1.4306; 1.4401; 1.4404; 1.4521; 1.4571;

Pipe Fittings: A403 WP304/304L; WP316/316L; WP317/317L; WP321; 1.4301;1.4306; 1.4401; 1.4404; 1.4521; 1.4571; SUS304/304L; SUS316/316L; SUS321; 08X18H10; 03X18H11; 12X18H10T; 10X17H13M; 10X17H13M2T


1. Hastelloy B3 Specification


Grade Hastelloy Alloy B3 / UNS N10675
Standard ASTM B564, ASME SB564
Dimensions ANSI / ASME B16.5, B16.47 Series A & B, B.16.48, BS4504, BS10, DIN, EN-1092, MSS SP44
Size 1/2" - 48" (15NB - 1200NB)
Class / Pressure Rating 150 Class, 300 Class, B3 Class, 900 Class, 1500 Class, 2500 Class, PN6, PN10, PN16, PN25, PN40, PN64, etc.
Form Slip on Flanges (SORF), Threaded Flanges, Weld neck Flanges (WNRF), Blind Flanges, Socket weld Flanges, Lap Joint Flanges, Ring Type Joint Flanges, Spectacle Blind Flanges, Spacer Ring Flanges, Long weld Neck Flanges, Nipo Flange, Nipolet Flanges, Plate Flanges, Flat Flange, Orifice Flanges, Forged Flanges
Flange Face Type Flat Face (FF), Raised Face (RF), Ring Type Joint(RTJ)


Orifice flanges in exchanger piping are usually in horizontal piperuns just above headroom level, but they may be placed at a lower level for convenience in attaching manometers and inserting orifice plates. Locally mounted pressure and temperature indicators on equipment or process lines, sight glasses, and level controllers should be visible from access aisles; and valves should be accessible from the aisles.


Where practicable, it is recommended that sufficient instrumentation is provided to be able to obtain a robust heat balance across the exchanger, thereby allowing its performance to be monitored in operation and facilitating straightforward analysis and troubleshooting.


It may be sufficient to simply make provision for the later use of temporary instrumentation. The designer should therefore always consider the addition of thermowells on heat exchanger inlet and outlet connections to allow performance monitoring.


Grade Specification


Hastelloy B3 2.4600 N010675


Chemical Composition


Grade Ni Mo Cr Fe W Mn C Al Ti Si
Hastelloy B3 65.0 min 28.5 1.5 1.5 3.0 max 3.0 max 0.01 max 0.50 max 0.2 max 10 max


Mechanical Properties


Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
9.2 g/cm3 1370 °C (2550 °F) Psi – 1,15,000 , MPa –760 Psi – 52,000 , MPa – 350 40%



Other Types of Hastelloy B3 Flanges

B3 Hastelloy Slip On Plate Flanges(SORF)

UNS N10675 Blind Flanges(BLRF)

Hastelloy B3 Orifice Flanges

ASME SB564 B3 Alloy weld Flanges

Hastelloy B3 Socket Weld Flanges Supplier

ASTM B564 Alloy B3 Threaded Flanges

Alloy B3 Long weld Neck Flanges

B3 Hastelloy Forged Flange

Alloy B3 Raised Face Weld Neck Flanges(WNRF)

ASTM B564 Hastelloy B3 Threaded Flanges

DIN 2.4600 Long weld Neck Flanges

B3 Alloy Ring Type Joint Flange(RTJ)

Alloy B3 Nippo Flanges Manufacturer

B3 Hastelloy Reducing Flanges

Alloy B3 Forged Flanges

DIN 2.4600 SORF Flanges

Hastelloy B3 Spacer

UNS N10675 WNRF & BLRF Flanges Exporter


2. Orifice Flanges


Orifice Flanges are used with orifice meters for the purpose of measuring the flow rate of either liquids or gases in the respective pipeline. Pairs of pressure "Tappings", mostly on 2 sides, directly opposite each other, are machined into the orifice flange. This makes separate orifice carriers or tappings in the pipe wall unnecessary.

Orifice Flanges generally come with either Raised Faces or RTJ (Ring Type Joint) facings. They are, for all intensive purposes, the same as weld neck and slip on flanges with extra machining.

The image on the right shows a set Orifice Flanges, where a Orifice Plate is mounted and a jack screw is machined. This jack screw is used to facilitate separating the flanges for inspection or replacement of the Orifice Plate and gaskets.


The range of orifice flanges covers all standard sizes and ranges, and all common flange materials. Flanges are available in Welding Neck, Slip On, and Threaded form, and are typically supplied with two 1/2" NPT tappings in each flange.

The American National Pipe Thread Tapered


NPT is the best known and most widely used connection where the pipe thread provides both the mechanical joint and the hydraulic seal. NPT has a tapered male and female thread which seals with Teflon® tape or jointing compound.

ASME B1.20.1 covers dimensions and gaging of NPT pipe threads for general purpose applications.


ASME B16.36 covers Dimensions and dimensional tolerances from orifice flanges (similar to those covered in ASME B16.5) that have orifice pressure differential connections. Coverage is limited to the following flanges:

  • Welding Neck Classes 300, 400, 600, 900, 1500, 2500
  • Slip On Class 300
  • Threaded Class 300

Drawing of Orifice Flanges



1/2" - 48" Forged Steel Flanges Hastelloy Alloy B3 ASME B16.5 2500 Class PN40 0

Product Attribute


Place of Origin China Brand Name BOYUE
Standard ANSI, ISO, ASME, DIN, ASTM Type Orifice Flange
ModelNumber HASTELLOY B-3 alloy Thickness #150,#300,#600,.#900,#1500,#2500
Packing Ply-Wood Cases Payment 30%TT+70% Balance


Supply Ability:40000Pieces / per Month

Packaging & Delivery

Packaging Details:Generally plywooden case or following customer's requirement.



Commerce Clause


Minimum Order Quantity: 1pcs
Price: Depending on quantity
Payment Terms: T/T or Western Union or LC
Supply Ability: 40000pcs per month
Delivery Time: 10-100 days depending on quantity

Why Choose Us

1. One-Stop Service,One Single Source.

2. No MOQ.

3. Best quality,competitive price

4. Fast Reply.

5. On-Time Delivery

6. Professional sales and technical team .




Q1: Are you a factory or a trade company?
A1: We are a professional manufacturer for designing and producing of Large-size products.(View Mor)

Q2: Do you make customized products or finished parts?
A2: All parts are custom made only, and in stock, we can produce based on your drawings.

Q3: Will my drawing be safe after you get it?
A3: Yes, we will not release your design to third party unless with your permission.

Q4: What is the MOQ?
A4: Small order is acceptable, but the more, the cheaper.

Q5: How about the samples?
A5: We are happy to make prototype part or sample for clients to ensure quality standard, but it’s charged according to your drawing.

Contact Details
BoYue Industrial (Shanghai)Co., Ltd.

Contact Person: david

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