ASME B16.47A/B16.47b Carbon Steel Flange

China ASME B16.47A/B16.47b Carbon Steel Flange, Find details about China ASME B16.47A Flange, ASME B16.47b Flange from ASME B16.47A/B16.47b Carbon Steel Flange

Model NO.
WELDING NECK
Manufacturing Way
Forging
Ndividual Drawing
Welcome
Trademark
TY
Transport Package
Pallet/Wooden Case
Specification
ASME B16.47A/B
Origin
China
HS Code
73079100
Model NO.
WELDING NECK
Manufacturing Way
Forging
Ndividual Drawing
Welcome
Trademark
TY
Transport Package
Pallet/Wooden Case
Specification
ASME B16.47A/B
Origin
China
HS Code
73079100

Carbon steel forgings, manufactured in accordance with ASTM/ASME A/SA105, are generally used for piping applications. These forged carbon steel piping components (including flanges, fittings, and valves, etc) are used for ambient- and higher-temperature service in pressure systems. The A105N, which is designated with a suffix "N", denotes that the A105 forging shall be furnished in normalized condition. If the forgings are used for piping applications of ASME BPVC or ASME B31, the material shall be its identical equivalent of SA-105 or SA-105N. In short, the heat treatment of normalization distinguishes A105N from A105, or SA-105N from SA-105.
Although normalization is a prevalent heat treatment procedure for ASTM A105 forgings, it is not a mandatory requirement except for the following piping components:

  • For ASTM A105 flanges manufactured in accordance with ASME B16.5 or ASME B16.47, if the pressure rating is above Class 300, normalization is a must.
  • For A105 flanges of special design where the design pressure at the design temperature exceeds the pressure-temperature ratings of Class 300, Group 1.1, or special design where the design pressure or design temperature are not known, normalization is also required.
  • For piping components other than flanges that are made from A105 forgings, if the size is over NPS 4 and the pressure rating is above Class 300, normalization is required. If the working pressure at the operating temperature exceeds the tabulated values for special Class 300 of Group 1.1, ASTM A105N shall be applied.
Q: Can ASTM A105 Forgings Be Used for Tubesheets?
A: ASTM A105/ A105M, identical with ASME SA-105/ SA-105M, is the standard specification for carbon steel forgings for piping applications. The application of ASME SA-105 forgings is endorsed by a series of ASME Boiler and Pressure Vessel Codes and ASME B31 Codes. However, the misuse of this material is commonly seen in some engineering practices. A typical misuse is that some fabricators may manufacture tubesheets from ASTM A105/ ASME SA-105 forgings by mistake.
In the standard specification, it states clearly in para 1.1 that "tubesheets and hollow cylindrical forgings for pressure vessel shells are not included within the scope of this specification". Hence ASTM A105/ ASME SA-105 forgings CAN'T be used for the manufacture of tubesheets. The tubesheet is an important pressure vessel component for heat exchangers, heaters, superheaters and evaporators, etc. For a carbon steel tubesheet, if it is not allowed to be made from A105, what material should it be made from? The answer is ASTM A266 or ASME SA-266 forging as stated in para. 1.3.

 

Raw Material Specification

This extremely common and mild carbon steel is one of the most common of all. The material is extra tough, meaning it won't break easily and is reasonably priced. This common carbon steel flange is seen in many industries and, with the help of lap joint end rings, are used in stainless steel piping systems.

The SA105N style is offered in 18" to 42" Blind Flanges, Weld Neck, Lap Joint and SLIP-ON, in both classes 150 and 300. They can also be found in different classes and sizes with longer lead times - 12" to 60".


CHEMICAL REQUIREMENTS ASTM/ASME A/SA105

ElementComposition, %
Carbon0.35 max
Manganese0.60-1.05
Phosphorus0.035 max
Sulfur0.040 max
Silicon0.10-0.35
Copper0.40 max (1)
Nickel0.40 max (1)
Chromium0.30 max (1-2)
Molybdenum0.12 max (1-2)
Vanadium0.08 max
(1) The sum of copper, nickel, chromium, molybdenum and vanadium shall not exceed 1.00%.
(
2) The sum of chromium and molybdenum shall not exceed 0.32%.
Note:
For each reduction of 0.01% below the specified carbon maximum (0.35%), an increase of 0.06% manganese above the specified maximum (1.05%) will be permitted up to a maximum of 1.35%.

Mechanical Properties of ASTM/ASME A/SA105 Materials

Tensile Strength min.Yield Strength min.Elongation min.Reduction of Area, min.Hardness
MPaksiMPaksi%%HB
48570250362230137-187

 

Shipped Flange Photos

ASME B16.47A/B16.47b Carbon Steel FlangeASME B16.47A/B16.47b Carbon Steel Flange
ASME B16.47A/B16.47b Carbon Steel FlangeASME B16.47A/B16.47b Carbon Steel Flange
 

Production Range

DN15-DN3000
Maximum weight 6tons
25,000tons production annual year

Manufacturing Standard

ANSI B16.5,ANSI B16.47 Series A&B,ANSI B16.48,ANSI B16.36
API 605,API 16D,API 17D
BS4504,BS3293
DIN
AS
EN1092-1
GOST
EEMUA145

Inspection Certificate

EN10204-3.1
EN10204-3.2 byTUV,BV,Lloyds,GL,DNV,SGS,ABS,RINA,Moody or other third parties

FAQ

What is the difference between ASME B16.5, ASME B16.47 Series A, Series B and API 605 Flanges
ASME B16.5 standard covers Steel Pipe Flanges and Flanged Fittings from NPS 1/2 through NPS 24 Metric/Inch in pressure class 150 to class 2500. It covers pressure-temperature ratings, materials, dimensions, tolerances, marking, testing, and methods of designating openings for pipe flanges and flanged fittings. Two very important flanges such as weld neck flange and blind flanges are very commonly used in piping systems. The term "B16.5" or "B16 5" is used interchangeability and refers to same standard. However, the standard ASME B16 5 (ANSI B16 5) only covers size up to 24 inches. For bigger sizes, ASME B16.47 standard covers pressure-temperature ratings, materials, dimensions, tolerances, marking, and testing for pipe flanges in sizes NPS 26 through NPS 60 and in ratings Classes 75, 150, 300, 400, 600, and 900.

However, the standard ASME B16.47 is further divided into ASME B16.47 series A and ASME B16.47 series B flange for Blind flange and Weldneck flange. Series B flange was also formerly known as API 605 flange. Term B16.47 or B 16 47 or ANSI B 16 47 are all used interchangeabily and refers to the same standard.

ASME B16.47(Large Diameter Steel Flanges) is a standard for large diameter steel pipe flanges sized from NPS 26 through NPS 60. The latest version provides dimensions and ratings in both metric and inch units. The ASME B16.47 incorporate MSS SP-44: Steel Pipeline Flanges and API 605: Large Diameter Carbon Steel Flanges. Therefore, the MSS SP-44 flanges are designated as ASME B16.47 Series A flanges, while API 605 flanges are designated as ASME B16.47 Series B flanges within this standard. Materials covered in this standard are as that in ASME B16.5 except for nickel alloys which means they share the same pressure-temperature chart for the selection of flange materials.

So what is the difference between ASME B16.47 Series A and Series B (API605) flanges?

Generally speaking, ASME B16 47 Series A flanges are much thicker, heavier and stronger than Series B flanges in the same size and pressure rating thus can withstand more external loading than Series B type. ASME B16.47 Series B flanges need more but smaller fasteners (bolts & nuts) than Series A flanges and have a smaller bolt circle diameter than that of Series A flanges. The smaller bolt circle diameter results in less flange movement after installation. Both Series A and Series B standards define weld neck flanges and blind flanges in raised face type (RF) but only Series A defines ring type joint (RTJ) flanges from Class 300 through Class 900 within this standard. From a commercial point of view, ASME B16.47 Series A flanges are more expensive than ASME B16 47 Series B flanges.

Most piping users or designers may choose Series A flanges for the new pipeline or equipment. But if you are doing some refurbishment, replacement job or non-critical piping design, Series B flanges are more popular.

Conclusions: Standard weld neck, slip on, blind etc. flanges are covered by standard B16.5 for sizes up to 24" nominal pipe. Sizes 26" and bigger are covered by B16.47 series A or series B for weldneck and blind flanges. Series A flange is heavier, thicker and cost more whereas series B flange has more bolt holes and is lighter cheaper than series A. API605 flange and series B flanges are same thing.