ASTM and GB standards
Size: 1-4"
Working pressure: 14-105MPa
Alloy Forged
According to API-7K

Features:

1) Commonly used to connect pipelines for well head equipment of oil wells and gas
wells, and connect pipelines for drilling, flushing, cementing and fracturing equipment

2) Different sealing types meet various requirements with reliable performance;
self-locking ACME thread provides easy and convenient put-on and take down;
spare parts of the same model are interchangeable; unions of different rated
pressure are easily identified by colors

3) Standards: all materials are compliant to ASTM and GB standards, hammer unions
for sour environment are manufactured in accordance with National Association of
Corrosion Engineers (NACE) MRO175 and American Petroleum Institute (API) RP-14E

4) End connections: either LP female thread or welded type, customers' specifications
are also acceptable

5) Size: 1-4"

6) Working pressure: 14-105MPa