Identify the thread
Provide the full thread designation and the mating pipe thread specification. Confirm compatibility and gauging requirements before ordering.
LEKE PIPING / PRODUCTS
Threaded Flanges
Threaded flanges connect through an internal pipe thread. State the thread standard and size.
PRODUCT DETAILS
Specify the connection completely.
We can also make custom sizes, thicknesses and other dimensions to your drawing. Send your specifications with your RFQ so we can confirm the details.
| Parameter | Details to confirm |
|---|---|
| Connection | Internal threaded bore |
| Thread | Specify the full thread designation, size, standard and gauging requirements |
| Flange | Specify flange size, standard and edition, pressure class and facing |
| Material | Specify material standard, grade and required material certificates |
Product dimensions, material grades and documentation are confirmed against your enquiry and applicable project requirements.
Primary dimensional reference: ASME B16.5 (NPS 1/2–24 where the type is covered). Confirm the product type, edition and applicable size before order.
DIMENSIONAL REFERENCE
Threaded Flange dimensional drawing.
Use the section view to identify the dimensions to confirm in your enquiry.
Reading this drawing
- D
- Flange outside diameter
- G
- Facing diameter shown in this drawing
- t
- Flange thickness indicated by the drawing
- X
- Hub outside diameter indicated by the drawing
- T₂
- Overall length through the hub indicated by the drawing
Symbols describe this supplied drawing. Confirm their correspondence with the selected standard and dimension table; notation may differ.
Any 1.6 mm facing height shown is specific to the supplied illustration. The applicable standard, pressure class and facing type determine the required value. This diagram does not define a universal facing height.
SELECTION & ENQUIRY
The details that make the difference.
Match the flange
Confirm flange size, pressure class, facing and bolt pattern against the mating flange and approved drawing.
Review service requirements
Provide the design pressure, temperature and service medium. Confirm that the threaded connection meets the approved project and installation requirements.
TECHNICAL REFERENCES
Check dimensions before your RFQ.
ASME B16.5 / thread specification
Flange dimensions and connection references
Check that the flange standard covers the threaded type, size and pressure class. Specify the governing thread standard separately, with its edition and inspection requirements.
Threaded Flange — weight estimate
Use the existing calculator for preliminary estimates. Confirm the final dimensions, material and actual product weight separately.
PRODUCT VIEWS
Threaded flanges — closer look.
Compare the product views. Use the dimensional drawings and confirmed specifications for your order.
DIMENSIONAL REFERENCES
Product reference dimensions.
Reference data retained from the existing product page. Check the stated standard, edition, units and the approved project specification.
Open ASME B16.5 Class 150 threaded flange reference table
ANSI B16.5 CLASS 150 FORGED THREADED FLANGES Dimensions Specification
| Nominal Pipe Size | Outside Diam. D | Diam. at Base of Hub X | O.D. of Raised Face G | Thickness t | Length Thru Hub Threaded T2 | Diam. of Hub at Bevel A | Radius of Fillet R | Thread Length Q |
|---|---|---|---|---|---|---|---|---|
| 1/2 | 89 | 30.2 | 35.1 | 11.2 | 15.7 | 21.3 | 3.0 | 15.7 |
| 3/4 | 99 | 38.1 | 42.9 | 12.7 | 15.7 | 26.7 | 3.0 | 15.7 |
| 1 | 108 | 49.3 | 50.8 | 14.2 | 17.5 | 33.5 | 3.0 | 17.5 |
| 1 1/4 | 117 | 58.7 | 63.5 | 15.7 | 20.6 | 42.2 | 4.8 | 20.6 |
| 1 1/2 | 127 | 65.0 | 73.2 | 17.5 | 22.4 | 48.3 | 6.4 | 22.4 |
| 2 | 152 | 77.7 | 91.9 | 19.1 | 25.4 | 60.5 | 7.9 | 25.4 |
| 2 1/2 | 178 | 90.4 | 104.6 | 22.4 | 28.4 | 73.2 | 7.9 | 28.4 |
| 3 | 191 | 108.0 | 127.0 | 23.9 | 30.2 | 88.9 | 9.7 | 30.2 |
| 3 1/2 | 216 | 122.2 | 139.7 | 23.9 | 31.8 | 101.6 | 9.7 | 31.8 |
| 4 | 229 | 134.9 | 157.2 | 23.9 | 33.3 | 114.3 | 11.2 | 33.3 |
| 5 | 254 | 163.6 | 185.7 | 23.9 | 36.6 | 141.2 | 11.2 | 36.6 |
| 6 | 279 | 192.0 | 215.9 | 25.4 | 39.6 | 168.4 | 12.7 | 39.6 |
| 8 | 343 | 246.1 | 269.7 | 28.4 | 44.5 | 219.2 | 12.7 | 44.5 |
| 10 | 406 | 304.8 | 323.9 | 30.2 | 49.3 | 273.1 | 12.7 | 49.3 |
| 12 | 483 | 365.3 | 381.0 | 31.8 | 55.6 | 323.9 | 12.7 | 55.6 |
| 14 | 533 | 400.1 | 412.8 | 35.1 | 57.2 | 355.6 | 12.7 | 57.2 |
| 16 | 597 | 457.2 | 469.9 | 36.6 | 63.5 | 406.4 | 12.7 | 63.5 |
| 18 | 635 | 505.0 | 533.4 | 39.6 | 68.3 | 457.2 | 12.7 | 68.3 |
| 20 | 699 | 558.8 | 584.2 | 42.9 | 73.2 | 508.0 | 12.7 | 73.2 |
| 24 | 813 | 663.4 | 692.2 | 47.8 | 82.6 | 609.6 | 12.7 | 82.6 |
COMMON QUESTIONS
Before you send the enquiry.
Can NPT and BSPT be used interchangeably?
Do not assume interchangeability. State the required thread standard so the connection and inspection requirements can be checked.
Which thread information should I specify?
State the thread designation, size and governing thread specification. Provide taper or parallel thread requirements and any required inspection or gauging criteria.
Can I identify the thread from a product photograph?
A photograph can show that a bore is threaded, but it cannot reliably establish the thread form, pitch, tolerance or compliance. Use a drawing and the stated specification.
Will any threaded pipe fit a flange of the same nominal size?
Nominal size alone is insufficient. The mating thread systems and required dimensions must agree; confirm both ends of the connection before ordering.
Are threaded flanges interchangeable with socket weld flanges?
They use different connection methods. Any proposed substitution requires approval against the project design and installation requirements.
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View product details →Need Threaded Flanges?
Request a quote for this product →Send the flange size, standard, class and facing, full thread designation, material grade and quantity. Include the drawing revision and required inspection documents.
SEND YOUR REQUIREMENT
From your specification
to a clearer quotation.
Email your item list with quantities, destination and required delivery date. Flag any open points.
USEFUL TO INCLUDE
- Flange size, standard, class and facing
- Exact thread standard and size
- Material, quantity and marking
- Inspection documents and destination
The quotation will confirm supply scope, required documents and delivery terms.