A105 Blind Flange Dimensions

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A105 Blind Flange is a high-performance forged carbon steel component used to seal the ends of piping systems, valves, and pressure vessel openings. These flanges are designed to withstand high pressure and temperature conditions, making them essential in industries like oil & gas, petrochemical, power generation, and water treatment. One of the most trusted names in the manufacturing and supply of A105 Blind Flanges is Raj Bhoomi Engineers, a reputed Indian company recognized for its quality standards and global supply network.

Raj Bhoomi Engineers is a leading manufacturer, stockist, and exporter of ASTM A105 Blind Flanges, producing them in accordance with international standards like ASME B16.5 and ANSI specifications. Their flanges come in a variety of sizes, pressure ratings (Class 150 to Class 2500), and face types such as Raised Face (RF), Flat Face (FF), and Ring Type Joint (RTJ). Each product undergoes rigorous testing for mechanical strength, chemical composition, dimensional accuracy, and corrosion resistance, ensuring superior performance in demanding applications.

With a strong manufacturing base and extensive inventory, Raj Bhoomi Engineers supplies A105 Blind Flanges not only to domestic clients but also exports them across the globe. Their international market reach includes key regions such as Oman, Qatar, Saudi Arabia, UAE, Kuwait, and extends to European countries like Spain and Germany, as well as North America (USA and Canada) and multiple African countries. Their reputation for on-time delivery and consistent product quality has made them a reliable global partner.

What sets Raj Bhoomi Engineers apart is their commitment to precision engineering and customer satisfaction. Each A105 Blind Flange is manufactured using high-grade raw materials and advanced forging technologies to meet diverse client specifications. They maintain strict quality control measures, and certifications such as ISO and PED compliance ensure that their products meet global standards.

Specification of A105 Blind Flange

Specification	Details
Material Grade	ASTM A105 (Carbon Steel)
Standard	ASME B16.5 / ANSI B16.5 / ASTM A105 / DIN / EN / BS
Size Range	½” NB to 48” NB (Nominal Bore)
Pressure Rating (Class)	150#, 300#, 600#, 900#, 1500#, 2500#
Flange Types	Weld Neck, Slip-On, Blind, Socket Weld, Threaded, Lap Joint, Orifice
Facing Type	Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ)
Connection Type	Welded, Thread

Their A105 Blind Flanges are commonly used in piping systems where a secure seal is needed at the end of a pipe or in pressure testing situations. The blind design helps isolate systems for maintenance or inspection without any risk of leakage. With high mechanical strength and excellent weldability, these flanges serve as a dependable choice in both moderate and severe service environments.

Raj Bhoomi Engineers has established itself as a key player in the global supply of A105 Blind Flanges, providing top-quality products with unmatched reliability. Their dedication to engineering excellence and customer-centric service makes them a preferred supplier in both emerging and developed markets around the world. Whether for oil refineries in the Middle East or chemical plants in Europe and North America, Raj Bhoomi Engineers continues to deliver value through its robust flange solutions.

A105 Blind Flange Chemical Properties

Element	Composition (%)
Carbon (C)	0.35 max
Manganese (Mn)	0.60 – 1.05
Phosphorus (P)	0.035 max
Sulfur (S)	0.040 max
Silicon (Si)	0.10 – 0.35
Copper (Cu)	0.40 max (if specified)
Nickel (Ni)	0.40 max (if specified)
Chromium (Cr)	0.30 max (if specified)
Molybdenum (Mo)	0.12 max (if specified)
Vanadium (V)	0.08 max (if specified)

A105 Blind Flange Dimensions Mechanical Properties

Property	Value	Unit	Notes
Tensile Strength	485 – 655	MPa	Minimum 70 – 95 ksi
Yield Strength (0.2% Offset)	≥ 250	MPa	Minimum 36 ksi
Elongation (in 2")	≥ 22	%	For standard specimen
Reduction of Area	≥ 30	%	May vary depending on test method
Hardness (Brinell)	≤ 187	HB	Maximum, as per ASTM A105 specification
Impact Energy (Charpy V-Notch)	Not required unless specified	–	Required only for low-temperature service

A105 Blind Flange Weight Chart

NPS (inches)	Class 150 Weight (kg)	Class 300 Weight (kg)	Class 600 Weight (kg)	Class 900 Weight (kg)	Class 1500 Weight (kg)	Class 2500 Weight (kg)
1/2"	0.6	0.8	1.0	1.3	1.6	2.0
3/4"	0.8	1.1	1.4	1.7	2.0	2.4
1"	1.0	1.5	2.0	2.5	3.2	4.0
1 1/4"	1.4	2.1	2.9	3.6	4.6	5.7
1 1/2"	1.8	2.8	3.8	4.8	6.2	7.7
2"	2.4	3.9	5.3	6.9	9.0	11.2
2 1/2"	3.4	5.3	7.4	9.6	12.5	15.6
3"	4.4	6.8	9.5	12.3	15.9	19.9
4"	6.9	10.3	14.5	18.8	24.2	30.4
5"	9.8	14.7	20.5	26.4	33.9	42.5
6"	12.9	19.6	27.5	35.5	45.7	57.3
8"	21.9	31.5	44.5	57.2	73.3	91.7
10"	34.7	50.2	70.8	90.9	116.5	145.8
12"	47.3	68.4	96.5	124.5	159.2	199.2
14"	63.2	91.3	128.8	166.2	212.5	265.6
16"	81.8	118.1	166.6	215.2	275.4	344.2
18"	101.4	146.6	206.3	266.3	340.5	425.6
20"	123.5	178.7	251.3	324.7	415.5	519.7
24"	188.2	271.4	382.1	494.1	633.3	791.4

Features of A105 Blind Flange Dimensions

Healthy, non-toxic, and stain-free
High temperature and pressure resistance
Hot welding connection
Leak prevention
Excellent heat insulation
Lightweight and easy to transport
Smooth inner wall for reduced pressure loss
Low noise
Suitable for exposed or hidden installation
Chemical corrosion resistance

Available Types Of A105 Blind Flange Dimensions

A105 Pressure Vessel Flange	Forged A105 Blind Flange
A105 Flange RTJ	A105 RF Blind Flange
CS HEAVY BLRF FLANGE	ANSI B16.47 Series A Blind Flange
ANSI B16.47 Series B Blind Flange	MSS SP-44 A105 Blind Flange
A105 Schedule 160 Blind Flange	ANSI/ASME B16.5 Blind Flange
ANSI/ASME B16.47 Series A(MSS SP44) Blind Flanges	ANSI/ASME B16.47 Series B Blind Flange
carbon steel slip on flanges	Custom A105 Blind Flange
A105 Forged Oversized Flange	A105 XXS Blind Flange

Applications Industry

Pharmaceutical Equipment
Chemical Equipment
Sea Water Equipment
Heat Exchangers
Condensers
Pulp and Paper Industry

Off-Shore Oil Drilling Companies
Power Generation
Petrochemicals
Gas Processing
Specialty Chemicals
Pharmaceuticals

FAQs – A105 Blind Flange Dimensions

1. What standard covers the dimensions of A105 Blind Flanges?

A105 Blind Flange dimensions are covered by ASME B16.5 (for sizes ½” to 24”) and ASME B16.47 (for sizes 26” to 60”). These standards define outside diameter, thickness, bolt circle, number of bolt holes, and raised face height.

2.Do A105 Blind Flange dimensions vary with pressure rating?

Yes. The higher the pressure class (150, 300, 600, 900, 1500, 2500), the thicker and heavier the flange becomes, with more and/or larger bolt holes to handle higher operating pressure.

3. How do you specify an A105 Blind Flange dimensionally?

It is specified by: Nominal Pipe Size (NPS) Pressure Class (e.g., 150, 300, 600, etc.) Facing Type (RF, RTJ, or FF) ASME Standard (B16.5 / B16.47)

4.Where can I get the dimensional details for procurement?

Exact dimensions are available in ASME standards and in manufacturer’s catalogues. Suppliers usually provide dimension and weight charts along with the quotation for easy reference.

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