J-Collar 是一种用于夹紧管道的锻件，常用于深水海底管线J型模式铺设系统中。是一种安装超重型管线安全可靠的方法。

Type 1---J-collar without Weld Overlay

Type 2---J-collar with Weld Overlay

J-collar安装时通过对接焊方式与管道连接，然后再由吊装系统将J-collar与管线安全地放入水下。

应用范围

Nominal pipe size (NPS):
6” to 24”

Service:
Standard (i.e. crude oil, natural gas, etc.) or Sour (i.e. hydrogen sulfide, carbon dioxide, etc.)

Design dimension:
As per DNVGL-ST-F101 or customer’s specification

Design temperature range:
-29°C to 121°C

设计

ASME BPVC, Section VIII, Division 1 and 2
DNVGL-ST-F101 Submarine pipeline systems
NACE MR0175 Sulfide Stress Cracking Resistant Metallic Materials for Oilfield Equipment
ASTM A694 Standard Specification for Carbon and Alloy Steel Forgings for Pipe Flanges, Fitting, Valves, and Parts for High-Pressure Transmission Service

J-collar 可以应用于各种工况环境，包括不同的应力载荷，不同的温度与压力等，为了验证产品设计的正确性与安全性，每种工况每规格的J-Collar 均应进行有限元分析。

Material

J-Collar： ASTM A694 F60/F65 with quenching and tempering
Weld Overlay (if required)：Inconel 625

External Coating：HBE-OS recommended by Roc-Master