Overview
Pipe cap is the pipe fitting which designed to be the ends of a piping ,its shape looks like a cap of people, so it get the name of pipe cap. In the butt welding pipe fittings range, the steel pipe cap is welded with the pipes directly to block off the flowing in a piping system.
ASTM A403 WP304 pipe fittings mean the pipe fittings which material is Wrought Austenitic Stainless grade A403 WP304, they are used for the pressure piping systems of moderate and high temperature services. ASTM A403 is the standard of pipe fittings material,it indicates the materials properties of different kinds of stainless steel,WP304 is one of the steel grade in this standard.304 a kind of common stainless steel,it is widely used to make for the manufacture of equipment and parts which needs good comprehensive performance,corrosion resistance and formability. In order to keep inherent corrosion resistance of stainless steel,steel must contain more than 18% chromium and more than 8% nickel. ASTM A403 WP304 is the most common stainless steel pipe fittings material.
Specification
Type | Cap |
Size | 1/2"to 24" |
Wall thickness | sch10, sch20, sch30, std, sch40, sch60, xs, sch80, sch100, sch120, sch140, sch160, xxs, sch5s, sch20s, sch40s, sch80s etc. |
Standard | ANSI B16.9 |
End | BW |
Technics | Forged |
Shape | Equal |
Connection | Welding |
Material | Stainless Steel: ASTM A182 F304/304L/316/316L, etc |
Application | Petroleum, chemical, power, gas, metallurgy, shipbuilding, construction, etc |
Chemical Composition
Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
SS 304 | 0.08 max | 2 max | 0.75 max | 0.045 max | 0.030 max | 18 – 20 | – | 8 – 11 | – |
SS 304L | 0.035 max | 2.0 max | 1.0 max | 0.045 max | 0.03 max | 18 – 20 | – | 8 – 13 | – |
SS 304H | 0.10 max | 2.0 max | 0.75 max | 0.045 max | 0.03 max | 18 – 20 | – | 8 – 10.5 | – |
Mechanical Properties
Grade | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
SS 304 | 8.0 g/cm3 | 1400 °C (2550 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
SS 304L | 8.0 g/cm3 | 1400 °C (2550 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
SS 304H | 8.0 g/cm3 | 1400 °C (2550 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 40 % |
Applications
1. Pipe and Tubes for petrochemical industry
2. Pharmaceutical industry
3. Food industry
4. Aviation and aerospace industry
5. Architectural decoration
