Cross reference guides, application and ... - INSCO Group

More documents

Recommendations

Info

TemperatureTemperature Adjustment FactorsIn general, the strength and therefore the pressure rating of metalhose decreases as the temperature increases. Thus, as the operatingtemperature of a metal hose assembly increases, the maximumallowable working pressure of the assembly decreases. The pressureratings shown in the specifications charts for corrugated andinterlocked hose are valid at 70°F. Elevated service temperatures willdecrease these pressure ratings by the factors shown in the followingchart for the alloy used in the braid wire. What also must be consideredis the maximum working temperature of the end fittings, of the hoseand their method of attachment.For example to calculate the maximum working pressure for:• 3⁄4” ID, 321 stainless steel corrugated hose• with single-braided, 304L braid• at 800°F.From the corrugated metal hose specification table, the maximumworking pressure at 70°F is 792 PSIG. Multiply 792 PSIG by 0.73.The maximum working pressure at 800°F is 578 PSIG.Temperature Adjustment Factor Based on Braid AlloyTemperature(˚F)304/304LStainlessSteel316 LStainlessSteel321StainlessSteelCarbonSteel70 1.00 1.00 1.00 1.00 1.00 1.00150 .95 .93 .97 .99 .93 .92200 .91 .89 .94 .97 .90 .89250 .88 .86 .92 .96 .87 .86300 .85 .83 .88 .93 .83 .83350 .81 .81 .86 .91 .82 .81400 .78 .78 .83 .87 .79 .78450 .77 .78 .81 .86 .77 .75500 .77 .77 .78 .81 .73 ----600 .76 .76 .77 .74 .72 ----700 .74 .76 .76 .66 .71 ----800 .73 .75 .68 .52 .70 ----900 .68 .74 .62 ---- ---- ----1,000 .60 .73 .60 ---- ---- ----1,100 .58 .67 .58 ---- ---- ----1,200 .53 .61 .53 ---- ---- ----1,300 .44 .55 .46 ---- ---- ----1,400 .35 .48 .42 ---- ---- ----1,500 .26 .39 .37 ---- ---- ----MonelBronzeSaturated Steam Pressure To Temperature (PSIG)Saturated Steam PressureTo Temperature (Hg)SaturatedSteam (PSIG)Temp (˚F)SaturatedSteam (PSIG)Temp (˚F)SaturatedSteam (PSIG)Temp (˚F)0 212 150 366 450 46010 238 175 377 475 46520 259 200 388 500 47030 274 225 397 550 48040 287 250 406 600 48950 298 275 414 700 50560 307 300 422 800 52075 320 325 429 900 53480 324 350 436 1000 54690 331 375 442 1250 574100 338 400 448 1500 606125 353 425 454 2500 669Saturated SteamVacuum (in. of Hg)Temp (˚F)---- 029.84 2029.74 3229.67 4029.39 6028.89 8027.99 10026.48 12024.04 14020.27 16015.20 1806.46 200DS-EN-1000 (05)800-232-3539 610-367-2260 Fax 877-647-4011 www.penflex.com sales@penflex.com 20pflex.catalog_090403.indd 204/6/09 6:04:43 PM
Pressure Loss and Flow Velocity InformationPressure LossFor the same flow characteristics, the pressure loss is higher in metalhoses than rigid piping, due to the profile of the corrugations. As arough estimation, expect the pressure loss in corrugated hoses to be150 percent higher than in new, smooth steel pipes.Classification of MotionFlow Velocity ConsiderationThe flow velocity in corrugated metal hose should never exceed 150ft./sec. for gas or 75 ft./sec. for liquids. When a hose is installed ina bent condition, the flow values should be reduced proportionally tothe degree of the bend. Where the flow velocity exceeds these rates, aninterlocked metal hose liner or larger hose I.D. is recommended.Random MotionSuch motion is non-predictable and occurs from the manual handlingof a hose assembly. Care must be taken to prevent over-bending ofthe hose and to avoid external abrasion of the wire braid. An armorcovering of interlocked hose provides protection againstthese abuses.Axial MotionThis type of motion occurs when there is extension or compression ofthe hose along its longitudinal axis. This class of motion is restrictedto unbraided corrugated hose only and is accommodated by travelingloops (see pg. 18) or bellows specifically designed for this purpose.Angular MotionThis type of motion occurs when one end of a hose assembly isdeflected in a simple bend with the ends not remaining parallel.To find the live hose length:L = πRØ/180 + 2(s)L = Live Hose Length (inches)Lπ = 3.1416R = Minimum Centerline BendRadius — Dynamic (in.)Ø = Angular Deflection (degreesS = Outside Diameter of HoseOffset MotionOffset motion occurs when one end of the hose assembly is deflectedin a plane perpendicular to the longitudinal axis with the endsremaining parallel. This movement can be due to a one-time (static)bend or movement which repeatedly occurs slowly over time (such asthermal expansion).• The appropriate formula to use to calculate Live Hose Lengthdepends on the condition of the moving end.• When the offset motion occurs to both sides of the hose centerline,use total travel in the formula;i.e., 2 x “T.”• The offset distance “T” for constant flexing should never exceed25 percent of the centerline bend radius “R.”• If the difference between “L” and “Lp” is significant, exercise careat installation to avoid stress on hose and braid at the maximumoffset distance.L = Live Hose Length (inches)Lp = Projected Live Hose Length (inches)R = Minimum Centerline Bend Radius — Dynamic (in.)T = Offset Motion to One Side of Centerline (inches)RC LOC LMinimum Bend Radius Occurs at Offset PositionMoving end is free to move “out of line” at neutral position.To find the live hose length:L = 6(RT) + T 2Lp = L 2 – T 2L = 6(RT) + T 2Lp = L 2 – T 2RRMinimum Bend Radius Occurs at Crowded PositionMoving end of hose is restricted to move only upand L down = 20(RT) as hose crosses neutral position.To find the live hose length:Lp = L 2 – T 2L = 20(RT)Lp = L 2 – T 2RRLpLpLLLL LpLpTTTTC LC LC LC LC LC LEnd of assembly freeto move out of lineat neutral positionEnd of assembly freeto move out of lineat neutral positionTTTTC LC LC LC LC LC LDS-EN-1000 (05)800-232-3539 610-367-2260 Fax 877-647-4011 www.penflex.com sales@penflex.com 21pflex.catalog_090403.indd 214/6/09 6:04:44 PM
Page 2 and 3: Exceptional ValueAbout PenflexPenfl
Page 4 and 5: Table of ContentsQuick Find Pressur
Page 6 and 7: The Penflex Product to Fit Your Req
Page 8 and 9: Light weight, price competitive to
Page 10 and 11: Penflex’s most widely used hoseSe
Page 12 and 13: Heavy Duty for Higher Pressure Appl
Page 14 and 15: Heavy Duty for Extreme Pressure App
Page 17 and 18: Bronze Braid for Series 794 HoseBro
Page 19: Technical InformationSelection Crit
Page 23 and 24: Assembly InstallationPenflex corrug
Page 25 and 26: Assembly Installation (continued)Do
Page 27 and 28: Glossary (continued)Cycle-Motion: T
Page 29 and 30: Glossary (continued)Profile: Used i

Cross reference guides, application and ... - INSCO Group

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?