CPVC管施工應注意事項

  1. CPVC 管之耐熱使用範圍：CPVC管一般使用於 200° F（ 93° C ）以下之熱溫流體，其使用溫度與使用壓力之關係。
  2. 混凝土之埋設：CPVC 管應儘量避免埋設於混凝土之內，如需埋設時須留意伸縮問題，且打混凝土前，管線須試 10kgf/cm 2的靜水壓，並維持 1 小時，無破裂或漏水時始可打混凝土。
  3. 膠合劑的選用：CPVC 管線的接合須採用耐熱性 CPVC 膠合劑，不可採用一般性之硬質 UPVC 膠合劑。
  4. 現場熱加工之防止：CPVC 管或 CPVC 接頭，禁止在工地作熱加工或以焊條焊接。
  5. 結凍之防止：CPVC 管與一般 UPVC 管相同，在寒帶地區之露出配管，須做凍結防止措施，其保溫材應採用耐熱性材質。
  6. 紫外線的防止：陽光直接照射，表面會加速褪色，故露出配管時，管線需以保溫材料保護或表面加以被覆。
  7. CPVC 管之褪色問題：CPVC 管長期使用於 80~90° C 之高溫下，表面雖會變白，但是對品質上不會有異常。
  8. CPVC 管的支撐：CPVC 管的支撐距離，如下表所示供參考。
  1. Range of heat resistance of CPVP: the CPVC pipe is usually used for heated fluids of up to 200° F （ 93 ° C ） . The relationship between temperature and the applicable pressure is given in Table.
  2. Embedding in RC: Embedding of CPVC pipes in RC shall be avoided. When necessa- ry, be sure to leave a proper expansion marg- in. Before grouting RC, a 1-hour static hydr- aulic test of 10kgf/cm 2 shall be conducted and the test shall show no fracture of leakage.
  3. Selection of adhesives: Adhesion of the CPVC pipe shall be carried out with a heatre- sistant type for CPVC and no ordinary vinyl adhesive shall be used.
  4. Prevention of site heating: No CPVC or UPVC fittings shall be heated or welded with arod in the work site.
  5. Prevention of freezing: Just like an ordinary UPVC pipe, all adapters used in cold areas shall be provided with freezing measured and the insulation material shall be heat-resistant.
  6. Prevention of ultraviolet rays: Direct sunshine on the surface of the pipe would make the pipe decolor. The protruding adapter shall be coated with insulation materials.
  7. Decoloring CPVC: When used in environment of 80~90° C for long periods of time, the surface of the pipe may turn whitish, though the quality remains the same.
  8. Support of CPVC: CPVC pipes shall be properly supported at the following pitch:
單位:m / Unit:m
標稱管徑 Nominal diameter 縱向支撐距離 Longitudinal pitch 橫向支撐距離 Horizontal pitch
35m /m ( 11/ 4” ) 以下 /and under 1.0 0.6
40m /m ( 11/ 2” ) ~ 65m /m ( 21/ 2” ) 1.5 1.0
80m /m ( 3” ) ~ 150m /m ( 6” ) 2.0 1.5
200m /m ( 8” )以上 /and up 2.5 2.0

9. CPVC 管的搬運卸貨：CPVC 管於搬運中或施工中應防止掉落，卸貨時亦禁止用拋落之不當方法。

10. CPVC 管管線之伸縮問題：

  • CPVC 管線之解決伸縮問題，請儘量採用圈狀伸縮接頭，不宜採用有橡膠環的伸縮接頭。
  • CPVC 管橫向直向配管，每 9M 長需裝配 1PC 伸縮接頭，如不採用伸縮接頭，則每 7m 以內採用 90 ?彎頭作平面狀配管，以縮短直線配管長度，並由彎頭來吸收熱脹冷縮所產生之內應力，其考慮伸縮問題的橫向配管施工，請參考照下圖。

9. Handling and unloading of CPVC pipe: When handing or installing CPVC pipes，keep them from falling. When unloading them, do not drop them.

10. Expansion of CPVC pipes:

  • As solution to the issue of expansion of CPVC pipes, use only tubular adapters rather than adapters having a rubber ring.
  • One expansion adapter shall be provid-ed to the CPVC pipe in both horizontal and vertical direction at every 9meters. If no expansion adapter is used, a flat bend of 90 ? shall be provided at every than 7 meters.The purpose of this adapter is to reduce the stretch of the linear pipin- g and the bend would absorb the internal stress created by the expansion. For trans- verse piping works, the issue of expansio- n shall be dealt in the following manner.