ASTM A182 SS Blind Flange

ASTM A182 is the standard specification for rolled or forged alloy, as well as stainless-steel pipe flanges, forged fittings, and parts and valves used for high-temperature service. ASTM A182 SS blind flange refers to a blind flange produced using ASTM A182 standard material.

We manufacture ASTM A182 SS304L and SS316L Blind Flange, which comes in many shapes and dimensions according to the client’s particular requirements. The ASME B16.5 Blind Flange follows the industrial standard of quality and safety, and these are available in size NPS 1/2” to NPS 24”. It is frequently produced from forged, cast, or plate material.

SS304L and SS316L BL Flange

ASTM A182 SS blind flanges are solid discs used to close pipelines or create stops.It is called a “Blind” flange because it does not have a bore or an opening in the center, unlike other types of flanges that are designed to connect pipes or equipment.

Blind flanges are manufactured without a bore and used to blank off the ends of piping, Valves and pressure Pressure Vessel openings From the standpoint of internal pressure and bolt loading, blind flanges, particularly in the larger sizes, are the most highly stressed flange types.Such flanges are suitable for use in hostile environments that have extremes of temperature, pressure or other sources of stress. This type of flange has been used successfully at pressures up to 5,000 psi.

ASTM A182 SS blind flange is forged from stainless steel material, which has the characteristics of high temperature resistance and corrosion resistance. SS304L and SS316L are common stainless steel flange materials.SS304L and SS316L blind flanges widely used in the industrial industry.

ASTM A182 SS304L BL Flange

ASTM A182 SS304L blind Flanges are different from its SS304 material variant in terms of the carbon content- 304 has a maximum carbon range of 0.08%, whereas it 0.03% in the case of 304L. The range of carbon content influences the corrosion resistance property of the flanges.

We produced SS304L blind flange in different size for customers, and we are certified to cater to the challenging requisites of a number of industries through our outstanding products and attentive services.

Equivalent Grades Of ASTM A182 SS 304L BL Flange

STANDARD	WERKSTOFF NR.	UNS	GOST	JIS	BS	AFNOR	EN
SS 304L	1.4307	S30403	Z3CN18‐10	SUS 304L	304S11	03X18H11	X2CrNi18-9 / X2CrNi19-11

Chemical Composition

CHEMICAL	LIMITS	C	Mn	P	S	Si	Ni	Cr	N
ASTM A182 F304L	MIN						8.00	18.00
	MAX	0.03	2.00	0.045	0.030	1.00	13.00	20.00	0.10

Mechanical Properties

MATERIAL	T.S (MPA)	Y.S (MPA)	EL %	R/A %
ASTM A182 F304L	485 min	170 min	30 min	50 min

SS316L BL Flange

SS 316L blind flange is made up of an austenitic stainless steel that has chromium, nickel and molybdenum in its composition with less carbon than the 316 material. The 4% molybdenum in the flanges makes them corrosion resistant against chloride ion rich environments. ZIZI Engineering is a leading supplier and exporter of these flanges. There are classes ranging from 150 to 2500.

Material Equivalent of SS 316L Flange

STANDARD	WERKSTOFF NR.	UNS	JIS	BS	GOST	AFNOR	EN
SS 316L	1.4404 / 1.4435	S31603	SUS 316L	316S11 / 316S13	03Ch17N14M3 / 03Ch17N14M2	Z3CND17-11-02 / Z3CND18-14-03	X2CrNiMo17-12-2 / X2CrNiMo18-14-3

Chemical Composition

CHEMICAL	LIMITS	C	Mn	P	S	Si	Ni	Cr	Mo	N
ASTM A182 F316L	MIN						10.00	16.00	2.00
	MAX	0.03	2.00	0.045	0.030	1.00	15.00	18.00	3.00	0.01

Mechanical Properties

MATERIAL	T.S (MPA)	Y.S (MPA)	EL %	R/A %
ASTM A182 F316L	485 min	170 min	30 min	50 min

Difference Between SS304L & SS316L Material

SS304L and SS316L are two common stainless steel materials that differ significantly in multiple aspects.

Chemical composition

SS304L

The main alloying elements include chromium (Cr) and nickel (Ni), with chromium accounting for about 18% and nickel accounting for about 8% to 12%.

The carbon (C) content is relatively low, usually below 0.03%, which helps to improve its welding performance and resistance to intergranular corrosion.

SS316L

In addition to containing chromium and nickel elements similar to SS304L, molybdenum (Mo) element is also added, with a molybdenum content of about 2% to 3%.

It also has a lower carbon content, usually below 0.03%.

Corrosion resistance

SS304L

It has good corrosion resistance to most acids, bases, solvents, and salts at room temperature.

Suitable for general corrosive environments, but may not be as good as SS316L in certain highly corrosive media.

SS316L

Due to the addition of molybdenum element, its corrosion resistance is superior to SS304L.

Capable of resisting various corrosive media, including sulfuric acid, nitric acid, chloride, and seawater.

Especially suitable for highly corrosive environments, such as marine engineering and chemical equipment.

Mechanical performance

SS304L

Has high strength and toughness, and can withstand certain tensile and compressive forces.

Easy to process and shape, with good plasticity and malleability.

SS316L

It also has higher strength and toughness, but compared to SS304L, its yield strength and tensile strength may be higher.

It also has good processing performance, but may exhibit different behaviors in certain processing processes due to the addition of molybdenum element.

Application

SS304L 

Water piping

Storage tanks

Indoor electrical enclosures

Kitchen equipment

Appliances

SS316L

Chemical piping

Pharmaceutical equipment

Medical equipment

Chemical equipment

Structural steel and components in marine environments

Dimension and Weight of ASTM A182 SS BL Flange

Stainless steel Blind flange dimensions are covered in ASME B16.5 – which covers Pipe Flanges and Flanged Fittings for size NPS 1/2” to 24” . For above NPS 26” to 60” it should be as per ASME B16.47. Pressure rating from Class 150 to Class 2500.

Class 150 BL Flange Dimension and Weight Data Sheet

Nominal Pipe Size		A	C	G	H	I	J	Weight
inch	mm	mm	mm	mm	Number of Holes	mm	mm	kg/piece
1/2	21.3	88.9	11.2	35. 10	4	15.7	60.45	0.42
3/4	26.7	98.6	12.7	42.9	4	15.7	69.85	0.61
1	33.4	108	14.2	50.8	4	15.7	79.25	0.86
11/4	42.2	117.3	15.7	63.5	4	15.7	88.9	1.17
11/2	48.3	127	17.5	73. 15	4	15.7	98.6	1.53
2	60.3	152.4	19. 10	91.9	4	19.1	120.7	2.42
21/2	73.0	177.8	22.4	104.6	4	19.1	139.7	3.94
3	88.9	190.5	23.9	127	4	19.1	152.4	4.93
31/2	101.6	215.9	23.9	139.7	8	19.1	177.8	6.17
4	114.3	228.6	23.9	157.2	8	19.1	190.5	7.00
5	141.3	254	23.9	185.7	8	22.4	215.9	8.63
6	168.3	279.4	25.4	215.9	8	22.4	241.3	11.3
8	219.1	342.9	28.4	269.7	8	22.4	298.5	19.6
10	273.0	406.4	30.2	323.9	12	25.4	362	28.8
12	323.8	482.6	31.75	381	12	25.4	431.8	43.2
14	355.6	533.4	35. 10	412.8	12	28.4	476.3	58.1
16	406.4	596.9	36.6	469.9	16	28.4	539.8	76.0
18	457.2	635	39.6	533.4	16	31.75	577.9	93.7
20	508.0	698.5	42.9	584.2	20	31.75	635	122
24	609.6	812.8	47.8	692.2	20	35.1	749.3	185

December 12, 2024