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Chock Supplied to Stabbing Mill Weight 10MT |
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| 1 |
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The Chokes shall be of cast steel free from manufacturing defects, internal defects like blow holes, cavities and surface defects like Cracks, Hard Spots, etc. |
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| 2 |
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The Choke bores shall be hydrostatically tested at 100 PST for checking internal soundness of casting. |
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Thecasting shall be ultrasonically tested to IS9565-86 level 3. |
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The forgings shall be ultrasonically tested to BHEL standard AA085-01-18 level 2. |
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The hydraulic cylinders of Bottom Choke assemblies shall be tested at 150 ATA for 13 minutes without leakage. |
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The forged rings, nuts, threaded rings, split rings, wear plates, etc shall be oil hardened and tempered to a hardness of 180-220 BHN. |
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All plugs, screws, bolts, nuts shall be cadmium coated and plungers of hydraulic cylinders shall be hard chrome plated to a thickness of 21 microns. |
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| 8 |
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Thechoke assemblies shall be interchangeable with those of existing chokes. |
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