RIOGLASS PTR® 80-4G

• outer diameter: 80,0 mm + 0,30 / – 0,30 mm
• wall thickness: 2,0 mm + 0,2 / – 0,2 mm
• steel-type: EN1.4541 or AISI321
• average solar absorptance of all receivers
  delivered:
  α ≥ 0,955 (95,5%) 2) ASTM
• absorptance of single absorber: αASTM ≥ 0,9452)
•  average thermal emittance of all receivers delivered (400°C): ε ≤ 0.0953) (9,5%)
• emittance of single absorber (400°C): ε ≤ 0.123)

• borosilicate glass 4)
• outer diameter: 136 mm ± 3.0 mm
• antireflective coating on ≥ 95,0% of aperture length
• average solar transmittance of coated area of all receivers
  delivered: τ ≥ 0.9652) (96,5 %)
• transmittance of single glass envelope in coated
  area: τ ≥ 0,960 2) (96,0 %)

• 31 kg +3,0 kg / -3,0 kg (unfilled)

• initial residual gas pressure ≤ 10-4 mbar

non-corrosive thermal oil with an effective partial pressure of dissolved hydrogen of pH2 < 30 Pa 5)

DIN1.4316 or DIN1.4551

Maximum bulk fluid temperature: 400 ºC

Reynolds number Re > 20.000

Solar concentration ratio: C < 100

• Min / max temperature ambient: -10ºC / +50ºC
• Max. relative humidity: 95%
• Max. design wind speed: 40 m/s
• Max. base wind speed: 30 m/s – wind class 3
• Max. equivalent acceleration 0,4 g in case of seism
• Compliance with maximum C2 corrosivity class conditions according to ISO9223

The RIOGLASS PTR®80-4G receivers are designed, manufactured and inspected in compliance to the following regulations

• Pressure Equipment Directive 2014/68/UE of the European Parliament
• ASME Sec. VIII Div. 1

Further requirements included in referred standards such as EN10217-7, A249, etc. are considered with the RIOGLASS PTR®80-4G receiver.

Standards for power or process piping (ASME B31.1 or ASME B31.3) are not designated for the RIOGLASS PTR®80-4G solar receiver as a component of pressure vessel. However, by following the requirements of ASME Sec. VIII Div. 1, RIOGLASS PTR®80-4G receivers fulfil also applicable requirements of ASME B31.1 and ASME B31.3.