Flanges and Fittings

Flanges and Fittings

316 SS pipe fittings and 316 Stainless Steel Flanges are an Austenitic standard molybdenum-bearing grade, which is very useful stainless steel and is highly resistant to general corrosion. Austenitic SS 316 is better than the conventional nickel chromium stainless steels such as 302 and 304.

CHEMICAL COMPOSITION

GRADE

 

Ni

Cr

Si

C

Mn

P

S

Mo

Fe


SS 316

MIN

10

16

0

 

2

 

MAX

14

18

0.75

0.08

2

0.045

0.03

3

BALANCE


SS 316L

MIN

10

16

 

2

 

MAX

14

18

0.75

0.03

2

0.045

0.03

3

BALANCE


SS 316H

MIN

10

16

0

0.04

0.04

   

2

 

MAX

14

18

0.75

0.1

0.1

0.045

0.03

3

BALANCE

The molybdenum gives SS 316 flanges and 316 SS Fittings better overall corrosion resistant properties than Grade 304, particularly higher resistance to pitting and crevice corrosion in chloride environments. The austenitic structure also gives these grades excellent toughness, even down to cryogenic temperatures.

Specification of Flange 

The specified ASTM Standard Specification for Wrought Austenitic 316 Stainless Steel Flanges is ASTM A182 with manufacturing standard such as ANSI/ASME B16.5, B16.48, BS4504, B 16.47 Series A & B, BS 10, EN-1092, DIN, etc

Mechanical Properties of Flange

Grade

Tensile Strength

Yield Strength

Elongation

Reduction of area

[MPA]

[MPA]

(% in 50mm) min

min %

SS 316

515

205

30

50

SS 316H

515

205

30

50

SS 316L

485

170

30

50

According to  application and uses in pipes and tubes SS 316  flanges are broadly grouped into different sort, for example, Welding Neck Flange(WNF) & Long Welding Neck Flange(LWNF), Slip-on Flange(SOF), Lap Joint Flange(LJW), Blind Flange, Socket Welding Flange (SWF), Threaded Flange(THW), Plate Flange.

SS 316  Flange for the most part has different  face type, for example, Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ), blind flange, with various class rating as 50 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16,din 2.4856 , 25, 40 & ANSI B16.5.

Specification of Fittings

The  Specification for Wrought Austenitic 316 Stainless Steel Fittings is ASTM A403, having Specific manufacturing Standards as ASME/ANSI B16.9, ASME B16.28, MSS-SP-43. 

Mechanical Properties of Fittings

Grade

Tensile Strength

Yield Strength

[MPA]

[MPA]

SS 316/H/L

515

205

Stainless steel 316 pipe fittings are categorically available are Elbow, Reducer, Tee, Coupling, Bend, Stub End, Cap, Nipple, Washer, Cross, Union etc which are available in different  types such as Welded, Seamless and Fabricated having thickness range from 5s, 10s, 40s, 80s, 10, 20, 40, STD, 60, 80, XS, 100, 120, 140, 160, XXS available with NACE MR 01-75

Application

UNS S31600 Flanges are used in many industries such as chemical processing equipment, rubber industry, paper & pulp industry, pollution control equipment, pharmaceutical industries and more. SS 316 is a low carbon containing variant of 316 and bears better immunity towards sensitization when compared.

PHYSICAL PROPERTIES

Grade

Density (g/cm3)

Elastic Modulus (GPa)

Mean Co-eff of Thermal Expansion (μm/m/°C)

Thermal Conductivity (W/m.K)

Specific Heat ( J/Kg.K)

Electrical Resistivity (nΩ.m)

0-100°C

0-315°C

0-538°C

at 100°C

at 500°C

0-100°C

SS 316/L/H

8

193

15.9

16.2

17.5

16.3

21.5

500

740

SS 316 or ASTM A 403 Pipe Fittings is utilized in number of utilizations like in pharmaceutical and sustenance preparing apparatus, careful inserts, marine outside trim, and modern hardware that hold the destructive strategy synthetic compounds that is utilized to make inks, rayon, paper, materials, blanches, elastic and photographic synthetic substances.