LR Elbow (Long Radius Elbow)

【Technology brief】

LR Elbow (Long Radius Elbow).

【Materia】

ASTM A234, ASME SA234 WPB , WPBW, WPHY 42, WPHY 46, WPHY 52, WPH 60, WPHY 65 & WPHY 70

【Size】

Seamless Elbow ( 1/2″~24″), ERW / Welded / Fabricated Elbow (1/2″~48″)

Description

HGFF Group Co.,Ltd is a Supplier of custom spiral wound gaskets. HGFF engineered spiral wound gaskets are ideal for applications that demand a gasket with the highest-quality flexibility and recovery to maintain a seal even in conditions characterized by fluctuating temperature and pressure.

Composed of a steel centering (outer) ring, a spiral wound sealing strip (filler) and an inner ring made of special steel, spiral wound gaskets are created by winding alternating strips of metal and filler material. Depending on the chemical compatibility requirements, the filler and winding material can be changed.

The spiral wound gasket depends upon the mechanical characteristics of a formed metal spiral strip, rather than the compressive virtues of more traditional gasket materials. This makes it particularly suitable for low or fluctuating bolt loads. The sealing strips, or fillers, are usually graphite, although other materials such as PTFE, Non-Asbestos, ceramic., may be used, the windings are always s/steel

These gaskets are manufactured to International specifications such as ASME, DIN, JIS, BS We also manufacture to customer’s specifications

Product Structure

Spiral wound gaskets are used in Refinery, Petrochemical, Chemical, Steam lines and Process Industries, where they have many advantages over older types of gaskets.

FLANGE STANDARDS

FLANGE STANDARDS SOR, SIO, SIOH, SIR type spiral wound gaskets can be manufactured in accordance with all relevant gasket standards and specifications to suit the following

ASME/ANSIB16.5 MSS SP44 (ASME B16.47 SERIES A) (AWWA)
BS 1560, BS10, BS4504 DIN FLANGES, JIS FLANGES
API 605 (ASME B16.47 SERIES B) FRENCH NF STANDARD

COMMON FILLERS USED

FILLERS MATERIALS MAX. WORKING TEMPERATURE
Graphite Mica 350 F (Temperature)
Graphite 99.8% purity 1200 C
Non-asbestos 550 C
PTFE 250 C
Ceramic 1000 C

WINDING MATERIAL:

SS304 650 Deg C
SS316 800 Deg C
SS347 870 Deg C
SS321 870 Deg C
Monal400 800 Deg C
Nickel 200 600 Deg C
Titanium 540 Deg C
Iconel600 1000 Deg C
Inconel625 1000 Deg C
Incoloy825 1000 Deg C

INNER AND OUTER RING

Carbon Steel, Stainless Steel 304,304L, 316,316L,316Ti,321,347, MONEL® 400,Inconel® 600,625,800, Incoloy® 800, 825, Nickel 200, Titanium, Hastelloy, Copper.

SPIRAL WOUND GASKET SIZES

Size & Shape as per Prevailing International standards or Customer needs can be produce

Technical Parameters

Spiral wound Gasket Dimensions: ASME B16.20: For Flanges to B16.47 Series A CLASS 150 LB

NPS Inner Ring Sealing Element Outer Ring
  Inside Dia (d1) Inside Dia (d2) Outside Dia (d3) Outside Dia (d4)
26 654.1 673.01 704.9 774.7
28 704.9 723.9 755.7 831.9
30 755.7 774.7 806.5 882.7
32 806.5 825.5 860.6 939.8
34 857.3 876.3 911.4 990.6
36 908.1 927.1 968.5 1047.8
38 958.9 977.9 1019.3 1111.3
40 1009.7 1028.7 1070.1 1162.1
42 1060.5 1079.5 1124.0 1219.2
44 1111.3 1130.3 1178.1 1276.4
46 1162.1 1181.1 1228.9 1327.2
48 1212.9 1231.9 1279.7 1384.3
50 1263.7 1282.7 1333.5 1435.1
52 1314.5 1333.5 1384.3 1492.3
54 1358.9 1384.3 1435.1 1549.4
56 1409.7 1435.1 1485.9 1606.6
58 1460.5 1485.9 1536.7 1663.7
60 1511.3 1536.7 1587.5 1714.5