Haihao Group supplies ASTM A387 Gr22 Cl2 hemispherical pressure vessel heads for Russian Client

At Haihao Group, we take pride in delivering high-quality products tailored to the specific needs of our global clients. Recently, we successfully completed the production of a batch of ASTM A387 Gr22 Cl2 material hemispherical pressure vessel heads for a valued customer in Russia.

ASTM A387 Gr22 Cl2 hemispherical pressure vessel head

Product Overview

The hemispherical heads, also known as “half-sphere heads,” are critical components for high-pressure vessels. Due to their geometry, they can withstand higher internal pressures compared to other types of heads such as elliptical or torispherical designs. The evenly distributed stress across the curved surface ensures excellent durability and safety under demanding operating conditions.

The material used — ASTM A387 Grade 22 Class 2 — is a chromium-molybdenum alloy steel, specifically engineered for use in elevated temperature service. Its composition and mechanical properties provide outstanding resistance to high-temperature creep, oxidation, and corrosion.

Key Features of ASTM A387 Gr22 Cl2 Hemispherical Heads

Material Standard: ASTM A387 Grade 22 Class 2

Material Composition:

Chromium (Cr): 2.00–2.50%

Molybdenum (Mo): 0.90–1.10%

Mechanical Properties:

Tensile Strength: 90–115 ksi (620–795 MPa)

Yield Strength (Min): 60 ksi (415 MPa)

Excellent toughness and durability at high temperatures.

Applications:

• High-pressure boilers
• Heat exchangers
• Oil and gas industry vessels
• Power generation facilities

ASTM A387 Gr22 Cl2 hemispherical pressure vessel heads

Production Highlights

Haihao Group utilized advanced forming and heat treatment technologies to ensure the hemispherical heads meet stringent quality standards.

Forming: Cold or hot forming techniques were used based on the thickness and diameter requirements.

Heat Treatment: Normalization and tempering processes were carried out to enhance the mechanical properties and stress resistance of the final products.

Quality Control: Each head underwent rigorous dimensional inspections, non-destructive testing (NDT), and material analysis to guarantee full compliance with the customer’s technical specifications and international standards.

The successful delivery of these ASTM A387 Gr22 Cl2 hemispherical heads not only demonstrates our strong production capacity and quality commitment but also deepens our cooperation with clients in the Russian market.