GRAYLOC在压力管道中的应用

在高压管道设计过程中，如管内流体为高压、高温、强腐蚀、强冲刷流体或介质时，应考虑用GRAYLOC卡兰替换传统法兰。该产品的特点是：较传统法兰更轻便、安装简洁、安装过程中无需对孔，安装后无需日常维护，更重要的是该产品采取的是硬密封，管类压力越大时，密封效果越好，从根本上颠覆了传统法兰运作原理。该产品在国外的安全使用已超过50年，国内部分行业也开始慢慢了解并开始接受，目前主要应用在：海洋平台建设、FPSO浮式生产储藏泄油船、LNG船、煤化、化工、石化航空航天等领域，TX们可以参考一下介绍对该产品进行一个更加直观全面的了解。

以下为该产品的详细介绍。

A Grayloc[size=-1]® connector has three components: a metal seal ring, two hubs and a clamp assembly.
Metal Seal Ring - The seal ring is a "T" in cross section. The leg of the "T" forms a rib that is held by the hub faces as the connection is made. The two arms form lip seals that create an area of sealing surface with the inner surface of the hub.
Two Hubs - The clamp fits over the two hubs and forces them against the seal ring rib. As the hubs are drawn together by the clamp assembly, the seal ring lips deflect against the inner sealing surfaces of the hubs. This deflection elastically loads the lips of the seal ring against the inner sealing surface of the hub, forming a self-energized seal.
Clamp Assembly - Designed to provide nearly 360 degree clamping contact with the hubs.  A relief notch in the centre of the clamp segments allow even distribution of makeup forces.  No specific orientation is required when installed.
Internal pressure reinforces this seal, so that the sealing action of the Grayloc[size=-1]® connector is both self-energized and pressure-energized



Anything the pipe can take, so can the Grayloc[size=-1]® Connector
When manufactured from the same material as the pipe, the Grayloc[size=-1]® connector surpasses the strength of the pipe and that of most other components
The rib of the seal ring prevents the seal lip from being crushed by over-tightening. While it acts as a positive stop during makeup, the rib also transfers compressive and bending loads from one hub element to another. The rib has bearing area ample to carry the most severe loading that the piping system can withstand.


Tension - The Grayloc[size=-1]® connection withstands greater tension loads than conventional ANSI flanges. In almost every case, Grayloc connections will withstand more tension loading than the pipe itself. Destructive tests have shown that pipe can be loaded in tension to failure without causing the Grayloc[size=-1]® connection to leak


Bending - Grayloc[size=-1]® connections are designed to withstand severe bending loads without leaking or loosening. Numerous independent tests have been run to evaluate Grayloc[size=-1]® connections under bending. In one, a 2-1/2" GR 20 Grayloc[size=-1]® connection was welded to 2-1/2" Sch. XX pipe and subjected to a 2" cold bend, 36" on center. The connection did not leak and clamp bolting remained tight.

Compression - In normal piping applications, it is not possible to overload the Grayloc[size=-1]® connection or seal ring in compression. When very high compressive loads occur, the maximum load on the connection is determined by the limit of the pipe. In most cases, the area of the seal ring rib is equal to or larger than that of the cross section of adjoining pipe.


Service Extremes - Vibration, heat, cold and thermal shock often accompany service in which psi connectors are heavily loaded. psi connectors consistently withstand severe situations without routine maintenance. Special designs permit maintenance-free service even under the extreme conditions shown in the table.

Grayloc vs. Flanges
Size	Connection	W.P.  (psi)	Diameter (inches)	Length (inches)	Weight (pounds)
3"	Grayloc Connector ANSI 1500 Flange API 5000 Flange	6,593 3,705 5,000	6.875 10.500 10.500	6.750 9.250 8.625	37 121 92
6"	Grayloc Connector ANSI 1500 Flange API 5000 Flange	6,359 3,705 5,000	12.000 15.500 15.500	9.500 13.500 14.250	144 407 365
10"	Grayloc Connector ANSI 1500 Flange API 5000 Flange	5,368 3,705 5,000	17.625 23.000 23.000	12.325 20.000 20.875	415 1100 1032

[ 本帖最后由 tekflow 于 2009-3-12 10:52 编辑 ]

有广告的嫌疑。说实在的，办公室里天天都有推销这玩意的，管道、法兰这方面的新产品很少采用，如果是阀门、换热器等，只要符合有关检测标准、手续齐全是可以考虑的。管道在设计上还是严格参照标准进行的，因为标准是经过检验的、可靠的，选用标准件不会出错，就是出了错也是标准的问题，和设计人员无关。新产品虽然可能有一定的优点，但是责任问题谁也不敢担的。传统的采制、连接方式，我们都比较熟悉，对将来的的使用是有把握的，对新材质就不敢了，才诞生2年的新产品就敢保证用10年、甚至50年，依据呢？你敢相信吗？

[ 本帖最后由 破坏之王 于 2009-3-17 23:47 编辑 ]

高压工况下，这种法兰还是很有用的。支持一下楼主。

顶一下，

GLOC卡箍法兰有替代传统法兰的前景。