Monolithic Insulating Joint 300mm DN40-DN700 PN1.6 Mpa PN2.5 Mpa PN4.0 Mpa PN6.4 Mpa PN10.0 Mpa

Name:Monolithic Insulating Joint Standard:GB3289.37 3298.38-82 Specifications:DN40-DN700 Connection mode:Welding Production method:Forged Acceptance: OEM/ODM, Trade, Wholesale, Regional Agency, Payment: T/T, L/C, PayPal Any inquiries we are happy to reply, please send your questions and orders. Stock Sample is Free & Available

Products Details

Product Introduction

Insulated joint is an indispensable and important pipeline accessory in the gas transmission and distribution system and oil pipeline system. It is mainly used in the gas transmission and distribution system and the gas pressure regulating station. Its function is to insulate and isolate the sections of the gas transmission and distribution pipeline, the gas pressure regulating station and the transmission and distribution pipeline from each other, protect it from electrochemical corrosion, extend its service life, and can also be directly buried for use. Based on the comparison, analysis and research with foreign products, the integrated insulation joint of our company is mainly designed for the leakage problems that often occur in China's gas transmission and distribution pipelines.

Product Features and Structural Principles

The integral insulating joint is composed of the following parts: upper and lower pipes, sleeves, insulating parts, seals, and insulating coatings. The upper and lower pipes of the insulating joint are connected with the end pieces, and the insulating parts and sealing parts are clamped to form a double sealing structure with insulating properties. The sleeve adopts two forms of groove welding or direct welding with the upper pipe, which firmly seals the insulating parts and the upper and lower pipes inside to form a "sealed container", which not only ensures good insulation effect, but also greatly improves the pressure bearing capacity of the insulation structure.

Pressure rating

PN25 pressure class insulated joint
Type Specification A B L  Steel pipe material
DN25-25 DN25 34 4 250 Steel Pipe
20 GB/T8163
DN25B-25 32 4 250
DN40-25 DN40 48 4 300
DN50-25 DN50 60 4 350
DN50B-25 57 4 350
DN65-25 DN65 76 5 350
DN80-25 DN80 89 5 400
DN100-25 DN100 114 5 400
DN100B-25 108 5 400
DN125-25 DN125 140 6 500
DN125B-25 133 6 500
DN150-25 DN150 168 7 500
DN150B-25 159 7 500
DN200-25 DN200 219 7 500
DN250-25 DN250 273 8 800
DN300-25 DN300 325 8 800
DN350-25 DN350 356 8 900
DN350B-25 377 8 900
DN400-25 DN400 406 8 900 Steel Pipe 16MnR
GB6654
DN400B-25 426 8 900
DN450-25   DN450 457 8 900
DN450B-25 480 8 900
DN500-25 DN500 508 10 900
DN500B-25 530 10 900
DN600-25 DN600 610 10 1000
DN600B-25 630 10 1000
DN700-25 DN700 711 10 1200
DN700B-25 720 10 1200
DN800-25 DN800 813 12 1300
DN800B-25 820 12 1300
PN40 pressure class insulated joint
Type  Specification A B L Steel pipe material
DN25-40 DN25 34 4 250 Steel Pipe 20
GB/T8163
DN25B-40 32 4 250
DN40-40 DN40 48 4 300
DN50-40 DN50 60 4 350
DN50B-40 57 4 350
DN65-40 DN65 76 5 350
DN80-40 DN80 89 5 400
DN100-40 DN100 114 5 400
DN100B-40 108 5 400
DN125-40 DN125 140 6 500
DN125B-40 133 6 500
DN150-40 DN150 168 7 500
DN150B-40 159 7 500
DN200-40 DN200 219 7 500
DN250-40 DN250 273 8 800
DN300-40 DN300 325 10 800
DN350-40 DN350 356 12 900
DN350B-40 377 12 900
DN400-40 DN400 406 10 900 Steel Plate 16MnR
DN400B-40 426 10 900
DN450-40 DN450 457 10 900
DN450B-40 480 10 900
DN500-40 DN500 508 12 900
DN500B-40 530 12 900
DN600-40 DN600 610 14 1000
DN600B-40 630 14 1000
DN700-40 DN700 711 14 1200
DN700B-40 720 14 1200
DN800-40 DN800 813 16 1300
DN800B-40 820 16 1300

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