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YOUNGNAM METAL
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GRIP-RING PIPE COUPLING
Model
GR-L
Series
GRIP Type
Product Description

GR-L※ PIPE O.D specifications are available in all sizes
SizeO/D(mm)RangeMLUW.PW.TP N.m(kgf/cm)
NDD1D2IndustrialShipIndustrialShip
15 1.2″21.3 21.7 22.0O/D±0.3M6 × 40L724039400.353~5 (30~50)
20 3/4″26.9 26.7 27.2O/D ±0.5M6 × 40L724047400.44~6 (40~60)
25 1″33.4 33.7 34.0O/D ±0.6M8 × 45L100555140200.450.455~8 (50~80)
32 1-1/4″42.2 42.4 42.7O/D ±0.6M8 × 45L100556240200.550.5510~12 (100~120)
40 1-1/2″40.9 44.5 48.3 48.6O/D ±1.0M8 × 45L100556640200.60.610~12 (100~120)
50 2″54.0 57.0 60.3 60.5O/D ±1.0M10 × 65L139848136181.31.315~18 (150~180)
65 2-1/2″66.7 69.0 73.0 76.3O/D ±1.0M10 × 65L1398410036181.41.415~18 (150~180)
80 3″79.8 84.0 88.9 89.1O/D ±1.5M12 × 75L20312211532162.92.940~50 (400~500)
90 3-1/2″98.0 101.6O/D ±1.5M12 × 75L20312214432163.23.240~50 (400~500)
100 4″106.3 108.0 114.3 118.0O/D ±1.5M12 × 75L20312214432163.23.240~50 (400~500)
125 5″129.0 133.0 139.8 141.3O/D ±1.5M14 × 90L20412817528144.84.860~80 (600~800)
150 6″154.0 159.0 165.2 168.3O/D ±1.5M14 × 90L20412819628145.25.260~80 (600~800)
200 8″204.0 216.3 219.1O/D ±2.0M16 × 120L255157260241211.016.2120~150 (1200~1500)
250 10″254.0 267.4 273.1O/D ±2.0M16 × 120L255157300201012.318.4120~150 (1200~1500)
300 12″304.0 318.5 323.9 325.0O/D ±2.0M18 × 140L25515735014714.921.3170~190 (1700~1900)


ND: Nominal Diameter (A)
ℓ: Allowable Shrinkage/Expansion Clearance (m/m)
D1: Actual Outer Diameter of Pipe (m/m)

U : Outer Diameter of Coupling (m/m)
M: Fastener Bolt Size/Length (m/m)
W.P: Working Pressure (kgf·cm2)
D2: Min./Max. Allowable Limit for Pipe (m/m)

L : Coupling Width (m/m)
P: Optimum Locking Torque Value Nm (kgf·)cm
W/T: Weight Per Unit (kg)

※ The specifications are subject to change for quality improvement.