1. Overview

Suitable for welded pipe joints in pipeline systems using oil as medium.Process lubricationThe nominal pressure is 31.5MPa, and the operating temperature is -25~+80℃. Welded end straight pipe joint, welded end straight long pipe joint, welded straight pipe joint, welded right angle pipe joint, welded four way pipe joint, welded bulkhead straight pipe joint, welded bulkhead right angle pipe joint, welded The types and dimensions of branch pipe joints and welded hinged pipe joints shall be as specified in Figures 1 to 10 and Table 1.

2. Structural form

3. Dimensions

4. Marking instructions

a. Welded end straight pipe joint with pipe outer diameter D0 of 18mm, thread diameter d of 22mm, and pitch of 1.5mm:

Pipe joint 18-M22 × 1.5 JB/966-77

b. Welded end-through long pipe joint with pipe outer diameter D0 of 18mm, thread diameter d of 22mm, and pitch of 1.5mm:

Pipe joint 18-M22×1.5 JB/1883-77

c. Welded end straight pipe joint with pipe outer diameter D0 of 28mm:

Pipe joint 28 JB970-77

d. Welded right-angle pipe joint with pipe outer diameter D0 of 28mm:

Pipe joint 28 JB971-77

e. Welded tee pipe joint with pipe outer diameter D0 of 18mm:

Pipe joint 18 JB972-77

f. Welded four-way pipe joint with pipe outer diameter D0 of 18mm:

Pipe joint 18 JB973-77

g. Welded bulkhead straight pipe joint with pipe outer diameter D0 of 28mm:

Pipe joint 28 JB974-77

h. Welded bulkhead straight-through angle pipe joint with pipe outer diameter D0 of 28mm:

Pipe joint 28 JB975-77

i. Welded branch pipe joint with pipe outer diameter D0 of 28mm:

Pipe joint 28 JB977-77

j. Type A welded hinged pipe joint with pipe outer diameter D0 of 28mm:

Pipe joint 28A JB978-77