钢管支架系统

Designed by corrosion engineers, Nu-Bolt™ is a standard pipe U-Bolt modified with a variety of corrosion resistant treatments to provide reliable, long-term service in severe operating environments associated with offshore oil & gas production and coastal process facilities.

Type 316 alloy stainless steel is used as the structural metal. This is a molybdenum-bearing grade steel which gives the better overall corrosion resistance properties than Type 304 and higher creep strength at elevated temperatures. Type 316 resists chloride attack, and is ideal for use in marine atmospheres and other corrosive environments.

Polyshrink is applied over the shank of the U-Bolt to protect the paint system during installation. Polyshrink is not designed to protect the U-Bolt. The material is a crosslinked, high compressive strength, UV-stable polyolefin, and is good for continuous operation up to 230°F (110°C).

Standard, stocked U-Bolt coatings:

Hot Dip Galvanize – suitable for moderately aggressive areas.

SermaGard® – an aluminum-ceramic coating offering superior corrosion resistance in aggressive environments.

I-Rod® is a high-strength thermoplastic rod in a half round configuration. I-Rod is inserted so the round surface interfaces with the pipe.

The half round profile:

Minimizes contact crevice, and thus eliminates moisture retention.

Provides a standoff between the pipe and support, and thus:
- Insulates electrically.
- Improves maintainability.
- Improves inspectability.

The high-strength thermoplastic material also:

Provides excellent compressive strength.

Is UV stable.

Has a low friction coefficient, which assists in pipe fitting when used as a beam dressing, and reduces coating damage during new construction.

When used independently as a beam dressing, I-Rod® is typically supplied in 5’ and 10’ lengths.

I-Rod Specifications (Standard High Impact Thermoplastic)

Property Value	Units	ASTM Test	Value
Density, 73ºF	-	D792	1.41
Tensile Strength, 73ºF	psi	D638	9,800
Tensile Modulus of Elasticity, 73ºF	psi	D638	440,000
Elongation (at break), 73ºF	%	D638	30-60
Flexural Modulus of Elasticity, 73ºF	psi	D790	455,000
Flexural Strength, 73ºF	psi	D790	13,800
Compressive Strength, 10% def, 73ºF	psi	D695	16,000
Coefficient of Friction (dry vs steel) Dynamic	-	PTM 55007	0.25
IZOD Impact (notched), 73ºF	ft-lbs/in of notch	D256	1.5
Hardness, Rockwell, 73ºF	-	D785	119-122
Deformation Under Load	%	D621	1.0
Melting Point	ºF	D3418	329
Coefficient of Linear Expansion	in/in/ºF	E831	5.8 x 10-5
Continuous Service Temperature	ºF	-	194
Heat Deflection Temperature, 264 psi	ºF	D648	220
Flammability Rating	-	VL94	HB
Volume Resistivity	Ohm-cm	D257	1.0 x 1015
Dielectric Strength, Short Term	V/mm	D149	420

Property Value	Units	ASTM Test	Value
Density, 73ºF	-	D792	1.28
Tensile Strength, 73ºF	psi	D638	16,500
Tensile Modulus of Elasticity, 73ºF	psi	D638	475,000
Elongation (at break), 73ºF	%	D638	80
Flexural Modulus of Elasticity, 73ºF	psi	D790	500,000
Flexural Strength, 73ºF	psi	D790	20,000
Compressive Modulus, 73ºF	psi	D695	480,000
Compressive Strength, 10% def, 73ºF	psi	D695	22,000
Coefficient of Friction (dry vs steel) Dynamic	-	PTM 55007	0.42
IZOD Impact (notched), 73ºF	ft-lbs/in of notch	D256	0.5
Hardness, 73ºF	-	D785	R125 / M112
Melting Point	ºF	D3418	N/A
Coefficient of Linear Expansion	in/in/ºF	E831	3.1 x 10-5
Continuous Service Temperature	ºF	-	340
Heat Deflection Temperature, 264 psi	ºF	D648	392
Flammability Rating	-	UL94	V-O
Volume Resistivity	Ohm-cm	D257	6.7 x 1017
Dielectric Strength, Short Term	V/mm	D149	830
Thermal Conductivity	BTU-in/ ft2 hr ºF	C177	0.90
Flammability Rating		UL94	V-O