Normal Stresses

Difference between ASTM A53 and ASTM A106?

1. A106-B contains silicon, min.0.10%where A53-B haszero%, andsilicon is the important element for improving the heat resistance criteria.2. A106-B contains manganese0.29-1.06%, where A53-B1.2%.3. A106-B contains low sulfur and phosphorus, max.0.035%where A53-B contains0.05and0.045%respectively.

Additional Comments on the topic:-

Chemical composition of A53 and A106 are not the same. A106 has silicon. As stated before, it is considered killed. The reason it is suitable for certain services is that welds that meet hardness requirements(NACE or Code)can be made with A106 with the use of low hydrogen electrodes and a preheat without using post weld heat treatment. HIC resistant Steels (Hydrogen induced cracking)will normallybe killed carbon steels.A106, being a killed steel, is suitable for some services with Hydrogen present while A53 is notWhat is the difference between API 5L and ASTM A106 pipes?

Grade 1(ASTM A252) Minimum Yield Strength: 30,000 psi Maximum Yield Strength: None Minimum Tensile Strength: 50,000 psi Notes: This grade is a standard grade for ASTM A252. The specification covers the requirements for welded and seamless steel piling pipe.Grade 2(ASTM A252) Minimum Yield Strength: 35,000 psi Maximum Yield Strength: None Minimum Tensile Strength: 60,000 psi Notes: This grade is a standard grade for ASTM A252. The specification covers the requirements for welded and seamless steel piling pipe.Grade 3(ASTM A252) Minimum Yield Strength: 45,000 psi Maximum Yield Strength: None Minimum Tensile Strength: 66,000 psi Notes: This grade is a standard grade for ASTM A252. The specification covers the requirements for welded and seamless steel piling pipe.Grade A(ASTM A53, A106, A523, API 5L PSL1 )Minimum Yield Strength: 30,000 psi Maximum Yield Strength: None Minimum Tensile Strength: 48,000 psi Notes: This grade may be used for standard pipe, line pipe, or conduit pipe as specified in the various ASTM and API specifications.Grade B(ASTM A53, A106, A523, API 5L PSL1)API 5L PSL2Minimum Yield Strength: 35,000 psi 35,000 psi Maximum Yield Strength: None 65,000 psi Minimum Tensile Strength: 60,000 psi 60,000 psi Maximum Tensile Strength: None 110,000 psi Notes: This grade may be used for standard pipe, line pipe, or conduit pipe as specified in the various ASTM and API specifications.Grade C(ASTM A106) Minimum Yield Strength: 40,000 psi Maximum Yield Strength: None Minimum Tensile Strength: 70,000 psi Notes: This grade can only be manufactured by the seamless process and is intended for high-temperature service as outlined in ASTM A106.API 5L X42PSL1PSL2Minimum Yield Strength: 42,000 psi 42,000 psi Maximum Yield Strength: None 72,000 psi Minimum Tensile Strength: 60,000 psi 60,000 psi Maximum Tensile Strength None 110,000 psi Notes: This is a standard line pipe grade specified in API (American Petroleum Institute) specification 5L.API 5L X46PSL1PSL 2Minimum Yield Strength: 46,000 psi 46,000 psi Maximum Yield Strength: None 76,000 psi Minimum Tensile Strength: 63,000 psi 63,000 psi Maximum Tensile Strength: None 110,000 psi Notes: This is a standard line pipe grade specified in API (American Petroleum Institute) specification 5L.API 5L X52PSL1PSL2Minimum Yield Strength: 52,000 psi 52,000 psi Maximum Yield Strength: None 77,000 psi Minimum Tensile Strength: 66,000 psi 66,000 psi Maximun Tensile Strength: None 110,000 psi Notes: This is a standard line pipe grade specified in API (American Petroleum Institute) specification 5L.API 5L X56PSL1PSL2Minimum Yield Strength: 56,000 psi 56,000 psi Maximum Yield Strength: None 79,000 psi Minimum Tensile Strength: 71,000 psi 71,000 psi Maximum Tensile Strength: None 110,000 psi Notes: This is a standard line pipe grade specified in API (American Petroleum Institute) specification 5L.API 5L X60PSL1PSL2Minimum Yield Strength: 60,000 psi 60,000 psi Maximum Yield Strength: None 82,000 psi Minimum Tensile Strength: 75,000 psi 75,000 psi Maximum Tensile Strength: None 110,000 psi Notes: This is a standard line pipe grade specified in API (American Petroleum Institute) specification 5L.API 5L X65PSL1PSL2Minimum Yield Strength: 65,000 psi 65,000 psi Maximum Yield Strength: None 87,000 psi Minimum Tensile Strength: 77,000 psi 77,000 psi Maximum Tensile Strength: None 110,000 psi Notes: This is a standard line pipe grade specified in API (American Petroleum Institute) specification 5L.API 5L X70PSL1PSL2Minimum Yield Strength: 70,000 psi 70,000 psi Maximum Yield Strength: None 90,000 psi Minimum Tensile Strength: 82,000 psi 82,000 psi Maximum Tensile Strength: None 110,000 psi Notes: This is a standard line pipe grade specified in API (American Petroleum Institute) specification 5L.Shut Off Head"Shut-off " head is a condition, when a centrifugal pump runs with discharge valve closed.-When a serviced pump is to be tested for its performance, we are running pump with different discharge condition to ensure that the pump is capable of performing as designed.-Shut-off head is the maximum head generated by a centrifugal pump with zero flow and relatively less power.Because it has to overcome very small head[up to discharge valve],less frictional losses and inertia loads.-So, shut off head is a part of the characteristic curves.#Caution:Dont run the centrifugal pump for a prolonged period in shut-off condition ,or else the liquid will get vaporize and pump will run dry and damaged the important part of the pumps like mechanical seal/gland packings, bearing ,etc.

#It IS A STANDARD OPERATING PROCEDURE "to operate a cf pump with closed discharge valve during start-up after proper priming to minimize the heavy loading of the liquid column .As the pump gain its normal speed, gradually open the discharge valve .Like-wise , when stopping a pump, close the discharge valve and then stop the pump.

#At its BEP(best efficiency point) the pump should be running between 80% and 85% of its shutoff head.#"Head pressure" on the other hand is more complicated. "Head" may be simply defined as anyresistance to the flow of a pump. When pump manufacturers list the head pressure, they are referring to the vertical discharge pressure head. Described in very simple terms, a pump's vertical discharge "pressure-head" is the vertical lift in height (usually measured in feet of water) at which a pump can no longer exert enough pressure to move water. At this point, the pump may be said to have reached its "shut-off" head pressure. When you look at a flow curve chart for apump, the "shut-off head" is the point on the graph where the curved line becomes horizontal as the flow rate at that point is zero. The higher a pump's head pressure, the more powerful the pump.

What do WOG Refer to in the case of valves?

I could find some valve's Pressure Rating are mentioned as 200 psi/WOG.

I think they are saying that the valve can withstand 200psi pressure for water/oil/gas. Correct me if I am wrong... I would appreciate more details on this.... Thanks in Advance...

http://acronyms.thefreedictionary.com/WOWOGWater-Oil-Gas (valves, pressure)

WOG is a do-not-exceed pressure, at normal ambient. It corresponds to "CWP" (Cold Working Pressure), the maximum pressure rating allowed under normal "ambient" temperature conditions, -29C to 38C.