JP6348441B2 - 複合容器の圧力サイクル試験方法 - Google Patents
複合容器の圧力サイクル試験方法 Download PDFInfo
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Description
複合容器1に対する圧力サイクル試験では、最小圧力が設計圧力の10%以下、及び最大圧力が設計圧力(常用圧力の1.1倍)の100%以上と規定されている。また、繰り返しの周波数が0.25Hz(15サイクル/分)を超えないこと、及び複合容器1の外表面温度が試験中に50℃を超えないこと、及び決められた試験サイクル数Nで行うことが規定されている。試験サイクル数Nは、試験の回数等により決定される。また、最低限サイクルの10%が最小設計温度で実施され、残りのサイクルは常温で実施される。複合容器1が破裂や漏れによる破壊を起こさずに、N回の圧力サイクルに耐え、且つ、追加的に実施されるN回の圧力サイクルにおいて、破裂による破壊を起こさなければ、合格となる。
設計確認試験における常温圧力サイクル試験として、まず、複合容器1に液体を充填し、大気圧と最高充填圧力(常用圧力)以上の上限圧力との間の圧力変動を毎分10回以下の割合で1万回以上繰り返すこと、及び、この場合、当該最高充填圧力の90%以上の圧力における保持時間は1.2秒間を超えることが規定されている。続いて、大気圧と耐圧試験圧力以上の上限圧力との間の圧力変動を毎分10回以上の割合で30回以上繰り返すこと、及び、この場合、当該耐圧試験圧力の90%以上の圧力における保持時間は1.2秒間を超えることが規定されている。続いて、破裂試験を行うことが規定されている。
設計確認試験における常温圧力サイクル試験として、複合容器1に液体を充填し、2MPa以下の圧力と最高充填圧力(常用圧力)の125%以上の圧力との間を、毎分10回以下で45000回以上往復させることが規定されている。合格基準は、11250回以下で漏れがなく、且つ、破裂しないこととされている。
参考文献:日本材料学会 腐食防食部門委員会編、「実験で学ぶ 腐食防食の理論と応用」、晃洋書房、1999年9月
R=ρ(L/A)
という関係が成り立つ。導電率Kは、ρの逆数であり、
K=1/ρ=L/(A×R)
で表される。この式を用いて、実施例1の水道水の導電率を求めた。実施例2のイオン交換水の導電率についても、実施例1と同様にして求めた。求めた導電率を表3に示す。
Claims (6)
- 金属製ライナの外周側に強化層を備え、高圧気体を保持可能な複合容器の圧力サイクル試験方法であって、
溶質が添加された溶液を圧力媒体として前記複合容器に充填する第1工程と、
前記複合容器に充填した前記圧力媒体の加圧及び減圧を複数サイクル繰り返し実施する第2工程と、を含み、
前記溶質は、アミン系及び有機酸系の少なくともいずれかを含み、
溶質の添加量は、1〜10wt%であり、
前記第2工程における前記圧力媒体の加圧により前記複合容器の内部圧力が基準圧力に到達し、かつ、基準圧力に到達するまでの時間が基準時間以上である場合、前記第2工程を終了する、複合容器の圧力サイクル試験方法。 - 前記溶液の溶媒は、導電率が2×10−4S/cmより低い、請求項1に記載の複合容器の圧力サイクル試験方法。
- 前記溶液の溶媒は、導電率が1×10−5S/cmより低い、請求項1に記載の複合容器の圧力サイクル試験方法。
- 前記溶液の溶媒は、導電率が5×10−6S/cmより低い、請求項1に記載の複合容器の圧力サイクル試験方法。
- 前記溶液の溶媒は、イオン交換水である、請求項1〜4のいずれか一項に記載の複合容器の圧力サイクル試験方法。
- 前記複合容器は、水素ステーション用蓄圧器である、請求項1〜5のいずれか一項に記載の複合容器の圧力サイクル試験方法。
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IT201700009278A1 (it) * | 2017-01-27 | 2018-07-27 | True Keg S R L | Metodo di prova per testare il comportamento meccanico sotto pressione di almeno un contenitore in materiale polimerico per liquidi alimentari |
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