Flanges and Fittings

Flanges and Fittings

Ferritic 444 SS Fittings and 444 SS Flanges is a low-carbon (C), low nitrogen (N), dual-stabilized ferritic stainless steel. Among the AISI 444 SS properties are pitting and crevice corrosion resistance superior to most ferritic stainless steels and some austenitic stainless steels. The 444 SS composition makes it a superior grade alloy with highly stabilized chemical composition, mechanical and thermal properties.

Chemical Composition

GRADE

 

Ni

Cr

Si

C

Mn

P

S

Mo

Fe

SS 430

Min

16

 

Max

0.5

18

1

0.12

1

0.04

0.03

BALANCE

Properties

444 Stainless Steel Fittings and 444 Stainless Steel Flanges chemical composition provides it with excellent corrosion resistance in moderately severe environments of many types that include chlorides and organic acids found in foods and beverages.

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 (μΩ.m)

0-100°C

0-315°C

0-538°C

at 100°C

at 500°C

0-100°C

SS 430

7.8

200

10.4

11

11.4

26.1

26.3

460

600

The ferritic class of stainless steel is generally considered to be weldable by common fusion and resistance techniques. SS 444 material properties also provide satisfactory resistance to dilute sulfuric acid solutions and to highly concentrated sodium hydroxide.

Specification of Flange 

The specified ASTM Standard Specification for Wrought Ferritic 444 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

According to  application and uses in pipes and tubes SS 444 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 444  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 Ferritic 444 Stainless Steel Fittings is ASTM A403, having Specific manufacturing Standards as ASME/ANSI B16.9, ASME B16.28, MSS-SP-43. 

SS 444 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

SS 444 Fitting and Flange are mainly used in Food processing and wine making equipment, roofing and cladding in marine environments, hot water tanks and geysers, automotive components and heat exchanger tubings.