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SEAM TESTING METHOD [8 records]

Record 1 2011-11-14

English

Subject field(s)
  • Engineering Tests and Reliability
  • Joints and Connections (Construction)
  • Waterproofing (Construction)
OBS

The pressurized dual seam [testing] method was mentioned earlier in connection with the double-wedge thermal seam method. The air channel that results between the double seam is inflated to approximately 30 lb/in[ upperscript 2] for 100 to 200 ft. If no drop in pressure occurs, the seam is acceptable;...

OBS

The hot wedge or hot knife method consists of an electronically heated resistance element in the shape of a blade that is passed between the two sheets to be sealed. As it melts the surfaces, roller pressure is applied. An interesting variation is the dual-hot-wedge method, which forms two parallel seams with an unbonded space between them. This space is subsequently pressurized with air and any lowering of pressure signifies a leak in the seam.

French

Domaine(s)
  • Fiabilité, contrôle et essais (Ingénierie)
  • Joints et assemblages (Construction)
  • Étanchéité (Construction)
OBS

Contrôle d'étanchéité de soudure sur [géo]membrane bitumineuse au moyen d'une cloche à vide.

OBS

Double soudure: Modalité d'assemblage comportant la réalisation simultanée de deux joints parallèles, effectués en soudure automatique et séparés par une zone non soudée. Ce canal central sert généralement à faire des tests d'étanchéité du joint, sous pression

Spanish

Save record 1

Record 2 2001-05-07

English

Subject field(s)
  • Strength of Materials
  • Engineering Tests and Reliability
  • Joints and Connections (Construction)
CONT

Seam Testing Methods... There are number of procedures available which have applicability on different geomembranes... the ultrasonic impedance plane method works on the principle of acoustic impedance. A continuous wave of 160 to 185 kHz is sent through the seamed liner and a characteristic dot pattern is displayed on a CRT screen. Calibration of the dot pattern is required to signify a good seam; otherwise, it is not. The method has potential for all types of geomembranes but still needs additional development work.

French

Domaine(s)
  • Résistance des matériaux
  • Fiabilité, contrôle et essais (Ingénierie)
  • Joints et assemblages (Construction)

Spanish

Save record 2

Record 3 1991-03-06

English

Subject field(s)
  • Joints and Connections (Construction)
  • Waterproofing (Construction)
  • Soil Mechanics (Engineering)
CONT

The pressurized dual seam [testing] method was mentioned earlier in connection with the double-wedge thermal seam method. The air channel that results between the double seam is inflated to approximately 30 lb/in2 for 100 to 200 ft. If no drop in pressure occurs, the seam is acceptable;...

OBS

The hot wedge or hot knife method consists of an electronically heated resistance element in the shape of a blade that is passed between the two sheets to be sealed. As it melts the surfaces, roller pressure is applied. An interesting variation is the dual-hot-wedge method, which forms two parallel seams with an unbonded space between them. This space is subsequently pressurized with air and any lowering of pressure signifies a leak in the seam

French

Domaine(s)
  • Joints et assemblages (Construction)
  • Étanchéité (Construction)
  • Mécanique des sols
OBS

Joint: Zone de liaison entre lés, nappes (ou panneaux),

OBS

Double soudure: Modalité d'assemblage comportant la réalisation simultanée de deux joints parallèles, effectués en soudure automatique et séparés par une zone non soudée. Ce canal central sert généralement à faire des tests d'étanchéité du joint, sous pression

Spanish

Save record 3

Record 4 1991-03-06

English

Subject field(s)
  • Joints and Connections (Construction)
  • Waterproofing (Construction)
  • Soil Mechanics (Engineering)
OBS

The pressurized dual seam [testing] method was mentioned earlier in connection with the double-wedge thermal seam method. The air channel that results between the double seam is inflated to approximately 30 lb/in2 for 100 to 200 ft. If no drop in pressure occurs, the seam is acceptable;,,,

OBS

The hot wedge or hot knife method consists of an electrically heated resistance element in the shape of a blade that is passed between the two sheets to be sealed. As it melts the surfaces, roller pressure is applied. An interesting variation is the dual-hot-wedge method, which forms two parallel seams with an unbonded space between them. This space is subsequently pressurized with air and any lowering of pressure signifies a leak in the seam

French

Domaine(s)
  • Joints et assemblages (Construction)
  • Étanchéité (Construction)
  • Mécanique des sols
OBS

Double soudure : Modalité d'assemblage comportant la réalisation simultanée de deux joints parallèles, effectués en soudure automatique et séparés par une zone non soudée. Ce canal central sert généralement à faire des tests d'étanchéité du joint, sous pression.

OBS

Soudure : Longtemps utilisé comme synonyme de "soudage" (...), ce terme est maintenant réservé exclusivement pour désigner le cordon de soudure exécuté par un procédé de soudage quelconque.

Spanish

Save record 4

Record 5 1991-03-06

English

Subject field(s)
  • Engineering Tests and Reliability
  • Joints and Connections (Construction)
  • Waterproofing (Construction)
CONT

Seam Testing Methods... The pressurized dual seam [testing] method was mentioned earlier in connection with the double-wedge thermal seam method. The air channel that results between the double seam is inflated to approximately 30 lb/in2 for 100 to 200 ft. If no drop in pressure occurs, the seam is acceptable;...

OBS

The hot wedge or hot knife method consists of an electrically heated resistance element in the shape of a blade that is passed between the two sheets to be sealed. As it melts the surfaces, roller pressure is applied. An interesting variation is the dual-hot-wedge method, which forms two parallel seams with an unbonded space between them. This space is subsequently pressurized with air and any lowering of pressure signifies a leak in the seam

French

Domaine(s)
  • Fiabilité, contrôle et essais (Ingénierie)
  • Joints et assemblages (Construction)
  • Étanchéité (Construction)
OBS

Contrôle d'étanchéité de soudure sur [géo]membrane bitumineuse au moyen d'une cloche à vide.

OBS

Double soudure: Modalité d'assemblage comportant la réalisation simultanée de deux joints parallèles, effectués en soudure automatique et séparés par une zone non soudée. Ce canal central sert généralement à faire des tests d'étanchéité du joint, sous pression.

Spanish

Save record 5

Record 6 1990-10-31

English

Subject field(s)
  • Engineering Tests and Reliability
  • Plastics Industry
OBS

Seam Testing Methods... Electric sparking is an old technique used to detect pinholes in thermoplastic liners. The method uses a high-voltage... current and any leakage to ground(through an unbonded area) will result in sparking. This method is not very sensitive to overlapped seams of the type generally used in liners and is used only rarely for this purpose.

French

Domaine(s)
  • Fiabilité, contrôle et essais (Ingénierie)
  • Industrie des plastiques
OBS

Pendant la pose du géotextile, on contrôlera : l'orientation et la disposition des nappes, la bonne exécution des assemblages, en particulier le sens et la longueur de recouvrement des nappes, les dispositions prises contre le soulèvement des nappes par le vent (...)

OBS

Electric spark/étincelle électrique.

Spanish

Save record 6

Record 7 1990-09-14

English

Subject field(s)
  • Engineering Tests and Reliability
OBS

Seam Testing Methods... The air lance method uses a jet of air at approximately 50 lb/in. 2 pressure coming through an orifice of 3/16 in. diameter. It is directed beneath the upper edge of the overlapped seam to detect unbonded areas.... The method works best on relatively thin flexible geomembranes....

OBS

Air lance: A device used to test, in the field, the integrity of field seams in plastic sheeting. It consists of a wand or tube through which compressed air is blown.

French

Domaine(s)
  • Fiabilité, contrôle et essais (Ingénierie)
OBS

Lance à air: Appareil utilisé sur le chantier pour vérifier l'étanchéité des joints dans les feuilles de plastique. Il consiste en un tube à travers lequel on souffle de l'air comprimé.

Spanish

Save record 7

Record 8 1990-09-14

English

Subject field(s)
  • Engineering Tests and Reliability
CONT

Seam Testing Methods... The air lance method uses a jet of air at approximately 50 lb/in. 2 pressure coming through an orifice of 3/16 in. diameter. It is directed beneath the upper edge of the overlapped seam to detect unbonded areas.... The method works best on relatively thin flexible geomembranes....

OBS

Air lance: A device used to test, in the field, the integrity of field seams in plastic sheeting. It consists of a wand or tube through which compressed air is blown.

French

Domaine(s)
  • Fiabilité, contrôle et essais (Ingénierie)
OBS

Lance à air: Appareil utilisé sur le chantier pour vérifier l'étanchéité des joints dans les feuilles de plastique. Il consiste en un tube à travers lequel on souffle de l'air comprimé.

Spanish

Save record 8

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