Values calculated using industry accepted formula t kdp where t torque, k torque coefficient dimensionless, d nominal diameter inches, p bolt clamp load lbs. A193 b7 suggested assembly torque values the tapped hole or nut must have an equal or greater proof load than the studs minimum ultimate tensile strength. Fluorolon 7545 kc multi gaskets on frp flat face flange class 150 bolting pattern flange size in. Target torque value per bolt size for standard flanges bolt grade. Astm a193 grade b8 specification covers requirements for 304304l stainless steel bolting material with high tensile properties, for use in high temperature or highpressure service and other special purpose applications. Torquetension relationship for astm a193a193m b7 and b16. Call or email us lightning bolt and supply today, where our fastener experts can meet all of your fastener needs any fasteners any material. Correct torque for bolt stress asme mechanical code. Based on the dhs standards, danloc group is considered an essential and critical business because we support the continued safe operations of pipelines, refineries, chemical plants and other critical manufacturing. This class offers a good grade of commercial products such as machine screws, bolts.
Astm a193 grade b7 bolts, grade b7 stud bolts, sa 193 gr. Astm a193 a193m b8 and b8m class 1 torque tension guide. Specifications for identification of bolts and screws was published. Ptfe coatings, lubrication, and assembly factors can alter these values. Like the astm a193 specification, unless otherwise specified, the 8un thread series is specified on fastener larger than 1 in diameter. Astm a193 specification covers requirements for chemical composition, mechanical properties, heattreatment, hardness, recommended nutswashers and markings for grade b8 fasteners. Stud bolts bolting torque tables table 1 astm a193. If lubrication is to be applied to the nut bolt,multiply the recommended torque by the appropriate factor shown in the table on. Astm sa193 b8 stud bolts, astm a193 b8 class 1 hex bolts. Viha steel is your source for astm a193 b8m class 2 bolts from 14 to 2 diameter in multiple lengths with standard or custom thread lengths. Table iii load and torque values for other materials. Set the torque wrench to the 60% torque value and repeat step 1.
Astm a193 b8 bolt a193 b8 stud bolt a193 b8 hex bolt. Lubricate on bolt threads and nut faces with compatible antiseize. Astm a193 a193m19 standard specification for alloysteel and stainless steel bolting for high temperature or high pressure service and other special purpose applications. A193 b7 studs, sa 193 b7 2h stud bolts, astm a193 b7 stud. A193 b7 bolting is available in metric sizes from m6 to m180 and imperial sizes from 14 to 7 inches, in diameter. Stud bolts bolting torque tables table 1 astm a193 and. These are tested based on various advanced testing machines and are also corrosion resistant.
Set the torque wrench to the 30% torque value and apply the torque. We supply best quality astm a193 grade b8 bolts, astm a193 b8 class 1 studs, astm a193 grade b8 fasteners exporter at cheapest available prices. In preparing this guide to torque values, the following basic assumptions have been made. Bolt size, tpi, proof load lbs, clamp load lbs, tightening torque ft lbs.
Astm a193 grade b7 bolts and threaded studs are manufactured from a chromiummolybdenum steel and are quenched and tempered heat treated to develop the desired mechanical properties strength. Bolt torque can be checked with a tool such as a torque wrench, but without a value as a guideline, a torque wrench offers no advantage. Suggested torque values for use with teadit 905 metalbest. Bolt torque calculator determining proper torque to bolt. The astm standard covers alloy steel and stainless steel bolting materials for high temperature or high pressure service. Torquetension relationship for stainless steel astm a193 a193m. Alloysteel and stainless steel bolting materials for hightemperature service1 this standard is issued under the. This specification covers requirements for chemical composition, mechanical properties, heattreatment, hardness, recommended nutswashers and markings for b8m class 2 fasteners. Astm a193 grade b7 specification boltport fasteners. Glossary of fastener terms the bolt supply house ltd. Astm a193a193m b8 and b8m class 1 torquetension guide. Astm a193 grade b7 torque chart boltport fasteners.
As specified in api 6a, clamp load calculated as 50% of the yield strength for the b7m and l7m specified in astm a193 a193m and a320a320m. Astm a193 grade b7 chromiummolybdenum alloy steel astm a193 grade b7 is a material specification for low alloy chromiummolybdenum steel, used for manufacturing of bolts, studs, stud bolts and other fasteners for bolting pressure vessels, valves, flanges and fittings for various process industries across major industrial sectors. Check all bolts at 100% torque with a circular pattern. Consult lgt engineering for bolt materials not listed. When it comes to the astm a193 grade b7 bolts, these hardware parts are designated for high temperature or highpressure service. Values in this chart are advisory only, all applications vary. A193 grade b7 is the most commonly used bolt specification coupled with a194 grade 2h nuts for bolting carbon steel pipeline.
Boltport uses alloy steel aisi 4140 bar stock or forging stock to produce b7 headed and nonheaded bolts. In simple terms, for a given torque, clamping load applied by the studbolts and nuts increases as the. Bolting material astm specifications bolting material specifications common designation. Yield strength is defined as the tension applied stress at which. Common bolt torque values can be looked up, but finding an accurate reference isnt always easy. We stock a large amount of astm a320 grade b8m stud bolts. We manufacture complete range of heavy hex bolts in metric and imperial sizes with coarse, fine, extra fine threads and full compliance to astm a193 grade b8. There a number of websites that will give bolt torque chart pdf and metric bolt torque chart pdf and these are free to download. Recommended torque for b7 studs astm a193 based upon 50% yield bolt diameter lubricated torque using copper, graphite or comparable lubricant with a coe. To arrive at the correct torque value, several other values must be found first. A bolt torque chart will give the estimated torque calculations. Astm a193 grade b8m class 2 specification boltport.
Astm a193 b7 metric bolts are available in various sizes and widths. Clamp load calculated as 75% of the yield strength for the b7, b16 and l7 specified in astm a193 a193m and a320a320m. Clamp load is also known as preload or initial load in tension on bolt. Set the torque wrench to the 30% torque value and apply the torque wrench in the crisscross pattern for that particular flange until.
A193 b8m,astm a93 grade b8m, a193 b8m class 2,astm a193 b8m,b8m bolts,b8m studs,grade b8m,b8m stainless,astm a193 grade b8m stud bolts etc. Bolt torque values fluorolon kc multi gaskets frp flat face flanges kc multi gaskets on frp flat face flanges with astm a193 gr. If lubrication is to be applied to the nut bolt,multiply the recommended torque by the appropriate factor shown in the table on page 7. The above table is applicable only for astm a320 grade b8, class 2 and a193 grade b8, class 2 stud bolts. Astm a193 b8m astm a193 b8m bolt astm a193 b8m hex bolt. Astm a193 grade b8 heavy hex bolts boltport fasteners.
We stock a variety of astm a193 din933, din 931, ansiasme b18. Manufacturers and suppliers of alloy steel a193 b8 threaded rods in mumbai india. Bolting quick reference guide aw chesterton company. Torque value based on 75% of proof load and finish as recieved steel.
L is the nominal length of the studbolt of the first to the last full thread excluding the chamfered at each end. There are several grades under astm a193 namely b7, b8 class 1, b8m class 1, b8 class 2, b8m class 2. Torq bolt manufactures astm a193 bolts, astm a193m bolts to your custom specifications, and we guarantee to meet your delivery schedule. This manual is applicable to slab gate valve and its purpose is to give guidance to the user with regard to. Lubricated refers to fasteners in the as received condition, which is normally a light preservative oil coating on unplated fasteners and no oil coating on plated fasteners. Lightning bolt is an iso 9001 certified fastener manufacturer for astm a320 grade b8 class 2 stud bolts. Asme bolting assembly torque values forged components. Clamp load calculated as 75% of the yield strength for the b7 specified in astm a193.
Table iii values for materials other than astm a193 grade b7 tables for use with rc series hydraulic cylinders. K is an experimental nut factor based on astm a193, b7 studs with heavy hex nuts material yield strength 12 214 diameter studs. Target torque value per bolt size for standard flanges. For combined temperature range of valve body and bolting material see next page. This specification is intended for use in pressure vessels, valves, flanges, and fittings. Tightening torque values from the formula tkdp, where t tightening torque, ib. Astm a193 b7 studs ped certified sa 193 b7 2h stud bolts manufacturer in india, astm a193 b7 stud material suppliers. Astm a193 b7 grade bolts are made of alloy steel, aisi 41404142 quenched and tempered and are intended for use in pressure vessels, valves, flanges, and fittings. Bolting quick reference guide n thread lubricant selection n bolting installation procedure. Studbolts and threaded bolts most important chemical elements corresponding materials. Torquetension relationship for astm a193a193m b7 and. B7 studs is the most common specification grade for stud bolts. Ktorquefriction coefficient, d nominal bolt diameter, in and pbolt clamping load developed by tightening, lb.
Grade b7 is the most common grade of a193 bolts used in construction. B8, class 2 bolting materials are strain hardened and have different yield strengths depending on bolt diameter. Assuming new, noncoated and well lubricated bolts astm a193 gr. The intent of this torque table is to find the balance between bolt yield and allowable gasket stress to achieve a longterm reliable seal. Here is the bolt torque chart for the astm a193 b7 grade bolts. The torque values can only be achieved if nut or tapped hole has a proof load greater than. We manufacture astm a193 stud bolts in national coarse unc thread pitches, mainly used in traditional applications. It is caused by a pushing or pulling force at 90 from the axis of a part. Astm a193 carriage bolt, astm a193 b8m flange bolt, astm a193 heavy hex bolt, astm a193 b8m hex cap screw, astm a193 b8m allen cap screw, astm a193 machine screw. B7 threaded studs and short, headed bolts are readily available in the marketplace. The torque values can only be achieved if nut or tapped hole has a proof load greater than or equal to the bolt s minimum ultimate tensile strength. Suggested torque values for use with teadit 905 metalbest gaskets standard asme b16. Torque values for 14 and 516in series are in inchpounds. A193 b7 b16 bolt size yield stress inch psi psi % lbf.
Astm a193 bolts, astm sa193 hex bolts, a193 hex head bolts. Astm a193 grade b8 specification boltport fasteners. Astm a193, grade b8 class 2 stainless steel, aisi 304, carbide solution treated, strain hardened specialized manufacturer of. Torquetension relationship for astm a193 b7 bolts and studs. The torque values can only be achieved if nut or tapped hole has a proof load greater than or equal to. Astm a193 a193m b8 and b8m class 1 torque tension guide 14 20 0. Apart from this it has many other features due to which this product is high in demand in the market. This info and more on our specialized a193 microsite originally approved in 1936, this specification is heavily utilized in petroleum and chemical construction applications. I note that in most cases, the required bolt stress is low way below the allowable tensile stress allowed for the bolt. Lightning bolt has one of the largest known inventories of blue ptfe b7 cap screws.
As a trusted partner, danloc group is open for business, so you can perform in your business. Astm a193 grade b8m class 2 specification for high tensile bolts, screws, stud bolts, anchor bolts, threaded rods, round bars and other externally threaded fasteners, made from 316 stainless steel. For nonstandard flanges, consult lgt engineering for target bolt stress and torque values. Astm a193 grade b8 specification for high tensile bolts, screws, stud bolts, anchor bolts, threaded rods, round bars and other externally threaded fasteners, made from 304 stainless steel. The torque values can only be achieved if nut or tapped hole has a proof load greater than or equal to the bolts minimum ultimate tensile strength. B8 class 1 or similar low strength and nuts are used with throughhardened washers. Astm a193 grade b7 bolts, grade b7 stud bolts, sa 193 gr b7. Torque and tensioning load values for a193 b8 type 304 and b8m type 316 class 1 stainless steel material. Astm a193 scope this specification is heavily utilized in petroleum and chemical construction applications and covers alloy steel and stainless steel bolting materials for high temperature or highpressure service. Astm a193 b7 metric bolts is a mixture of titanium and other chemical components.
Boltport offers astm a193 grade b8 heavy hex bolts to asme b18. On large projects, b7 stud bolts are commonly sold together with bolt and gasket packages. Torque estimating chart astm a193, grade b7 studs lubricant. A193 gr b7 bolts and a194 gr 2h nuts can only be used at moderate temperatures depending on the permissible differential. Metric bolt torque chart lists the typical maximum recommendations for tightening torques for metric bolts.
1364 1051 1133 641 204 1457 681 1160 627 847 811 1004 528 1383 764 716 712 150 1459 347 310 337 679 1544 1390 139 239 105 324 695 1096 940 1264 872 186 1396 1197 438 1250 365 715 76 721 252 1440 752