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ASTM A420 WPL6 Low Temperature Pipe Fittings Reducer & Elbow

Click to preview:ASTM A420 A420M 01D ASTM A420 WPL6 Pipe Fittings Specification Specifications : ASTM/ASME A420 WPL6 / A860 – MSS-SP-75 WPHY 42 / 46 / 52 / 56 / 60 / 65 / 70 Low temperature Steel : A420 WPL3 / A420 WPL6 Size : ½”NB to 48″NB in Sch 10s, 40s, 80s, 160s, XXS Dimensions : ANSI/ASME B16.9, B16.28, MSS-SP-75 Schedules : Sch.40 to Sch.XXs Types : Seamless / Welded Reducer A420 WPL6 20''x1.75''~16''x1.44'' ASME B16.9 EL90 A420 WPL6 LR 14''x1.25'' ASME B16.9 A420 WPL6 EL90 ASME B16.9 Elbows What's the ASTM A420? ASTM A420 is the standard specification for pipe fittings of carbon steel and alloy steel used for low temperature services. WPL6 is the most used grade material under A420.  Besides Grade WPL6, the…

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ASTM A420 WPL6 Pipe Fittings Specification

Specifications : ASTM/ASME A420 WPL6 / A860 – MSS-SP-75 WPHY 42 / 46 / 52 / 56 / 60 / 65 / 70

Low temperature Steel : A420 WPL3 / A420 WPL6

Size : ½”NB to 48″NB in Sch 10s, 40s, 80s, 160s, XXS

Dimensions : ANSI/ASME B16.9, B16.28, MSS-SP-75

Schedules : Sch.40 to Sch.XXs

Types : Seamless / Welded

What’s the ASTM A420?

ASTM A420 is the standard specification for pipe fittings of carbon steel and alloy steel used for low temperature services. WPL6 is the most used grade material under A420. 

Besides Grade WPL6, the standard also includes WPL9, WPL3, WPL8, impact test temperature correspondingly at -45℃, -75℃, -100℃, -195℃.

ASTM A420 covers elbow, tee, reducer, cap, union and etc, which manufactured according to ASME B16.9, ASME B16.11, MSS SP-79 and MSS SP-95, types in seamless and welded structual pipe fittings. These fittings commonly used in pressure pipelines and pressure vessel/tanks at lower temperature.

ASTM A420 WPL6 pipe fittings compatible with ASTM A333 Grade 6 Pipe and ASTM A350 LF2 Class 1 Flange.

Chemical Composition of ASTM A420 WPL6 Fittings

1) Steel shall comply with the chemical composition requirements of each material specified in Table Chemical Requirement.
2) The chemical composition of the weld metal is not required to meet the same restrictions as the base metal. However, the composition of the weld deposit metal shall meet the minimum mechanical and impact properties specified in this standard.
The tensile properties of the pipe fitting materials shall be in accordance with the tensile properties required for the material grades listed in Table Tensile Requirements.

Table Chemical Requirement

Mechanical Properties A420 WPL6 Material

Table Tensile Requirements

Manufacturing Methods for A420 WPL6 Fittings

Forging or forming operations may be performed by hammer forging, press forging, perforating, extrusion, top forging, rolling, bending, welding or machining, or two or more methods at the same time. The molding process should ensure that no harmful defects on the fittings making.

Heat Treatment

Fittings under ASTM A420 shall be furnished in the normalized, normalized and tempered, annealed, or quenched and tempered condition. All welding shall be completed prior to the austenitizing heat treatment.

Impact test performance

The impact properties of base metal and weld metal shall comply with Tables Charpy Impact Requirements.

Table Charpy Impact Requirements

Hydro-static Tests

1) Hydro-static testing is not required under ASTM A420.
2) All fittings shall be capable of withstanding without failure, leakage, or impairment of their serviceability, a hydro-static test pressure equal to that prescribed for the specified matching pipe of equivalent material.

Radio-Graphic Examination

All fusion-welded butt joints shall be subjected to full length radio-graphic inspection in accordance with ASME Boiler and Pressure Vessel Code. Generally speaking, radiography or ultrasonic examination shall be performed after all forming operations have been done. But if the fittings made from the pipes that has been done such test already, then no need to do again.

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